GMR Switch Precision Digital Sensors
GMR Switch™ Precision Digital
gital Sensors
When GMR sensor elements are combined with digital on-board signal processing
electronics, the result is the GMR Switch. The GMR Switch offers unmatched precision
and flexibility in magnetic field sensing.
The GMR Switch will accurately and reliably sense magnetic fields with less error than
any other magnetic sensor on the market today. In addition, there is little shift in the
magnetic field operate point of the GMR Switch over voltage and temperature extremes.
This gives NVE’s customer the ability to make a high precision, high tolerance magnetic
sensing assembly.
The GMR switch can operate over a wide range of magnetic fields, and is the most
precise magnetic sensor on the market. It is the clear choice when a digital output signal
is required of a magnetic sensor.
Operate Point Error Band for Typical Magnetic Sensors
(4.5V to 30V, -40C to +125C)
Allegro 3141LLT
(Hall Effect)
200
Honeywell SS441A
(Hall Effect)
Magnetic
Operate Point
(Gauss)
150
NVE AD023-00
(GMR)
NVE AD022-00
(GMR)
Honeywell 2SSP
(AMR)
50
NVE Corporation
(800) 467-7141
The GMR Switch Holds Tighter
Operate Point Specifications
Than Any Competing Product!
NVE AD021-00
(GMR)
11409 Valley View Road, Eden Prairie, Minnesota 55344 USA
Email: info@nve.com
11/15/02
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GMR Switch Precision Digital Sensors
Quick Reference: GMR Switch Digital Sensors
The following table lists some of NVE’s most popular GMR Switch products and their
key specifications:
NVE AD004-02
NVE AD005-02
NVE AD021-00
NVE AD022-00
NVE AD024-00
NVE AD124-00
NVE AD621-00
Typical
Magnetic
Operate
Point
(Oe1)
20
40
20
40
28
28
20
Typical
Magnetic
Release
Point
(Oe1)
10
25
10
25
14
14
10
NVE AD824-00
28
18
NVE ADH025-00
11
5
Part Number
Output
Type2
Maximum
Operation
Temperature
(°C)
Package
Type3
Sink
Sink
Sink
Sink
Sink
Source
Sink +
Source
2 Sinks +
SCP
Sink
125
125
125
125
125
125
125
SOIC8
SOIC8
MSOP8
MSOP8
MSOP8
MSOP8
MSOP8
125
MSOP8
150
MSOP8
Notes:
1.
1 Oersted (Oe) = 1 Gauss in air
2.
Output Types:
Sink = Up to 20mA current sink
Source = Up to 20mA current source
SCP = Short Circuit Protection available for external transistor
3.
See Appendix for package dimensions
Note on Availability of Products
NVE keeps about 25 of the most popular types of GMR Switch products in
stock at our manufacturing facility. However, because there are over 100
different varieties of GMR Switch parts, some part numbers may require a 6 to 8
week lead time before production quantities are available. Please contact NVE
for further information.
NVE Corporation
(800) 467-7141
11409 Valley View Road, Eden Prairie, Minnesota 55344 USA
Email: info@nve.com
11/15/02
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GMR Switch Product Selection Guide
GMR Switch Product Selection Guide
NVE’s GMR Switch is available in a wide range of packaging, output type, and magnetic
trigger field varieties. The purpose of this selection guide is to explain the different
output and packaging options, as well as to provide information on how to specify the
correct part number when ordering.
All NVE GMR Switch product part numbers follow the same general form. As shown
below, the first “x” in the part number specifies output type and available voltage
regulator output, the next two x’s specify trigger field and direction of sensitivity, and the
last pair specify the package type. The following sections define these variations in
detail.
NVE ADxxx-xx
Output Type and
Available Regulator
Package Type
Trigger Field, Direction of
Sensitivity, Low Voltage Operation
Output Type and Available Regulator
The first numeric digit of the part number NVE ADxxx-xx specifies the output type, and
the availability of a regulated voltage supply on a separate pin. The following four output
types are available:
20 mA Current Sink
20 mA Current Source
Separate 20 mA Sink and Source
Two Separate 20 mA Sinks
All outputs turn ON when the magnetic field is applied. An output that turns OFF when
the magnetic field is applied is available as a custom product; please consult NVE.
Some of NVE’s GMR Switches also feature a regulated supply voltage available external
to the part on a separate pin. This regulator provides a 5.8V reference capable of
supplying up to 3 mA of drive current. This regulated output may be used to run an LED
or other low power device.
NVE Corporation
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GMR Switch Product Selection Guide
In addition to these options, NVE recently introduced a GMR Switch that has provisions
for shutting down an external power transistor in case a short circuit is detected. This is
useful in applications where the finished sensor assembly must be “bulletproof,” or
immune to improper connection.
The following table defines the first digit in the NVE AD part number:
NVE AD x xx-xx
Number
0
1
2
3
4
5
6
Meaning
20mA Current Sink
20 mA Current Source
Separate 20mA Current Sink and 20mA Current Source
Two Separate 20mA Current Sinks
20mA Current Sink + Regulated Output Voltage
20 mA Current Source + Regulated Output Voltage
Separate 20mA Current Sink and 20mA Current Source +
Regulated Output Voltage
Two Separate 20mA Current Sinks + Regulated Output
Voltage
Two Separate 20mA Current Sinks + Regulated Output
Voltage + Short Circuit Detection and Shut-Off
Separate 20mA Current Sink and 20mA Current Source +
Regulated Output Voltage + Short Circuit Detection and
Shut-Off
7
8
9
Trigger Field, Direction of Sensitivity, Low Voltage Operation
The second and third numeric digits of the part number NVE ADxxx-xx specify the
magnetic trigger field and direction of sensitivity of the part. Five different magnetic
trigger fields are available for the GMR Switch:
-
10 Gauss
20 Gauss
28 Gauss
40 Gauss
80 Gauss
(10 Oe, 1.0 mT, 0.8 kA/m)
(20 Oe, 2.0 mT, 1.6 kA/m)
(28 Oe, 2.8 mT, 2.23 kA/m)
(40 Oe, 4.0 mT, 3.2 kA/m)
(80 Oe, 8.0 mT, 6.4 kA/m)
Other magnetic trigger field levels ranging up to 250 Gauss are available on a custom
basis; please contact NVE.
NVE Corporation
(800) 467-7141
11409 Valley View Road, Eden Prairie, Minnesota 55344 USA
Email: info@nve.com
11/15/02
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GMR Switch Product Selection Guide
In addition to defining the magnetic operate point, these two digits are used to define the
direction of sensitivity and optional low voltage operation. The GMR Switch can be
ordered in Standard Axis or Cross Axis directions of sensitivity; for definitions please see
NVE AD Series Sensitivity Direction and Pin Configuration later in this section.
NVE also makes a GMR Switch with the on-chip voltage regulator bypassed. This limits
the voltage range of the part, but allows it to operate at voltages as low as 3.0V.
The following table defines the second and third digits in the NVE AD part number:
NVE AD x xx-xx
Number
04
05
06
20
21
22
23
24
25
81
82
83
84
Meaning
20 Gauss OP, Standard Direction of Sensitivity
40 Gauss OP, Standard Direction of Sensitivity
80 Gauss OP, Standard Direction of Sensitivity
28 Gauss OP, Standard Direction of Sensitivity
20 Gauss OP, Cross Axis Direction of Sensitivity
40 Gauss OP, Cross Axis Direction of Sensitivity
80 Gauss OP, Cross Axis Direction of Sensitivity
28 Gauss OP, Cross Axis Direction of Sensitivity
10 Gauss OP, Cross Axis Direction of Sensitivity
(ADH Series Only; see page 38)
20 Gauss OP, Cross Axis Direction of Sensitivity, Low Volt
40 Gauss OP, Cross Axis Direction of Sensitivity, Low Volt
80 Gauss OP, Cross Axis Direction of Sensitivity, Low Volt
28 Gauss OP, Cross Axis Direction of Sensitivity, Low Volt
Note: For parts that operate at 10 Gauss, see the following section describing the NVE
ADH Series sensors.
NVE AD Series Sensitivity Direction and Pin Configuration
Pin configuration is for the NVE AD Series GMR Switches is given in the following
diagrams. In addition, most GMR Switch parts are available with a choice of two
directions of sensitivity. “Standard” direction of sensitivity is defined as the direction
parallel to the edge of the package containing the pins. “Cross-Axis” direction of
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GMR Switch Product Selection Guide
sensitivity is defined as the direction perpendicular to the edge of the package containing
the pins. Pin configuration and sensitivity direction for the SOIC8 and MSOP8 packages
are defined in the drawings below:
NVE AD0xx-xx through NVE AD7xx-xx, NVE ADH0xx-xx:
Standard Axis
N/C
Source
Sink(2)
VCC
VCC
N/C*
Source
Sink(1)
N/C*
Cross Axis
Ground
Vreg
Sink(2)
Vreg
Sink(1)
N/C
Ground
Note: In the case of a Standard Axis Part with the Vreg pin option, Sink(1) will appear at the pin labelled N/C*
NVE AD8xx-xx through NVE AD9xx-xx:
Cap2
VCC
AD8xx-xx
Cap
Sink(2)
Cross Axis
Cap2
VCC
AD9xx-xx
ShortH
Cap
Sink(1)
Source
Vreg
Ground
Ground
ShortL
Sink
Cross Axis
Vreg
Pin configuration and sensitivity direction for the AD0xx-10 TDFN6 package are defined
in the drawing below:
AD0xx-10
N/C
Out
N/C
Test
N/C
Cross Axis
N/C
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Ground
Ground
AD0xx-10
VCC
Standard Axis
VCC
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N/C
Out
GMR Switch Product Selection Guide
Package Type
NVE GMR Switches are available in three different packages: an SOIC 8 pin package,
an MSOP 8 pin small outline package, and a TDFN 6 pin ultra-miniature package.
Package drawings are shown in the Appendix.
The following table defines the last two digits in the NVE AD part number:
NVE AD x xx-xx
Number
00
02
101
Package Type
MSOP8
SOIC8
TDFN6
1
Note : At this time, the TDFN6 package is only available in AD0xx-10 configuration.
In addition to these three package types, NVE offers a custom version of the MSOP8
package for the NVE AD024-00 part. In this version, the BD012-00, all three
connections are made on one side of the package, and the pins on the other side of the
package are clipped off flush with the body of the package. This allows the user to
position the sensing element as close to the edge of a circuit board or assembly as
possible. A pinout of this package is shown below:
VCC
BD012-00
N/C*
Cross Axis
Out
Ground
The maximum length of the clipped leads is 0.30mm, leading to an overall package
length of 4.25mm, as compared to 4.90mm for the normal MSOP8 package. This part is
available in tape and reel format only.
Other versions of the GMR Switch may be available in this package configuration on a
special order basis. Please contact NVE for further information.
NVE Corporation
(800) 467-7141
11409 Valley View Road, Eden Prairie, Minnesota 55344 USA
Email: info@nve.com
11/15/02
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GMR Switch Product Selection Guide
Characteristics Over Voltage and Temperature
Typical Operate Points (OP) and Release Points (RP)
AD004 and AD005
Applied Field
(Oersteds)
50
Ambient Temperature = 25C
40
AD005 OP
30
AD005 RP
20
AD004 OP
AD004 RP
10
0
5
10
15
20
25
30
Supply Voltage
Operate Point (OP) and Release Point (RP) Variation
Over Temperature
Applied Field (Oe)
50
40
AD005 OP
30
AD005 RP
20
AD004 OP
AD004 RP
10
0
-40
0
40
80
120
Temperature (C)
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GMR Switch Product Selection Guide
Temperature (C)
Operating Temperature Derating Curves for SOIC8,
MSOP8, and TDFN6 Packages in Free Air
130
SOIC8
120
110
100
MSOP8
and
TDFN6
90
80
5
10
15
20
25
30
Supply Voltage (V)
Output Current Derating Curve
Maximum Output
Current (mA)
25
20
(Continues to 30V)
15
10
4.5
6
7.5
9
10.5
Supply Voltage (V)
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AD0xx-xx to AD7xx-xx
AD0xx-xx to AD7xx-xx
Features:
⇒
⇒
⇒
⇒
⇒
⇒
⇒
Precision Magnetic Operate Point
Excellent Temperature and Voltage Performance
Digital Outputs
Frequency Response 0 to 250KHz
Optional Voltage Regulator Output
Optional Low Voltage Version
Small, Low Profile Surface Mount Packages
Applications:
⇒ General Digital Position Sensing
⇒ Pneumatic Cylinder Position Sensing
⇒ Speed Sensing
Description:
The NVE AD0xx-xx to AD7xx-xx GMR Switches are digital output magnetometers that
offers precision operate points over all temperature and input voltage conditions. They
are available with magnetic trigger fields from 20 to 80 Gauss, and four different output
configurations, making them an extremely flexible and user-friendly design.
Functional Block Diagram (NVE AD0xx-xx to NVE AD7xx-xx,
Except NVE AD08x-xx):
Voltage
Regulator
(5.8V)
Current Sinking
Output
4.5V to 30V
GMR
Bridge
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Comparator
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AD0xx-xx to AD7xx-xx
Functional Block Diagram (NVE AD08x-xx):
3.0V to 6.0V
Current Sinking
Output
GMR
Bridge
Comparator
Output Characteristic as a Function of Magnetic
Field, for AD024-00 GMR Switch
Output Current, mA
(10V Supply, 1K Load Resistor)
12
10
ON
OFF
8
OFF
ON
6
4
2
0
-40
-20
0
20
40
Applied Magnetic Field (Oe)
Magnetic Characteristics:
Typical Operate
Minimum
Maximum Operate
Minimum
1,2
Point
Operate Point
Point
Differential
20
15
25
5
28
21
34
5
40
30
50
5
80
60
100
5
Note: All Values in Oersteds (Oe); 1 Oe = 1 Gauss in Air
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Maximum
1,2
Differential
14
20
25
35
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11/15/02
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AD0xx-xx to AD7xx-xx
Electrical Specifications (NVE AD0xx-xx to NVE AD7xx-xx,
except NVE AD08x-xx):
Parameter
4
Supply Voltage
Supply Current, Single Output
3
Current Sinking Output
3
Current Sourcing Output
Output Leakage Current
Sinking Output Saturation Voltage
Sourcing Output Saturation Voltage
6
Regulated Output Voltage
Regulated Output Current
Symbol
VCC
ICC
IO
IO
ILEAK
VOL
VOH
VREG
IREG
Min
4.5
2.5
0
0
3.5
Max
30
4.5
20
20
10
0.4
VCC-2.5
6.2
3.0
Units
V
mA
3
mA
3
mA
μA
V
V
V
mA
Test Condition
Operating
Output Off, VCC=12V
Operating
Operating
Output Off, VCC=12V
Output On, IOL=20mA
Output On, IOL=20mA
Operating
Operating
Units
V
mA
mA
3
mA
μA
V
Test Condition
Operating
Output Off, VCC=3V
Output Off, VCC=6V
Operating
Output Off, VCC=5V
Output On, IOL=20mA
Electrical Specifications (NVE AD08x-xx):
Parameter
Supply Voltage
Supply Current, Single Output
Supply Current, Single Output
2
Current Sinking Output
Output Leakage Current
Sinking Output Saturation Voltage
Symbol
VCC
ICC
ICC
IO
ILEAK
VOL
Min
3.0
0.7
1.7
0
Max
6.0
1.2
2.2
20
10
0.4
Absolute Maximum Ratings (NVE AD0xx-xx to NVE AD7xx-xx,
except NVE AD08x-xx):
Parameter
Supply Voltage
Reverse Battery Voltage
Current Sinking Output Off Voltage
Current Sourcing Output Off Voltage
Current Sinking Reverse Output Voltage
Current Sourcing Reverse Output Voltage
Continuous Output Current
4
Operating Temperature Range
Storage Temperature Range
5
Magnetic Field
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Symbol
VCC
VRBP
I0
TA
TS
H
Min
-40
-65
Max
33
-33
33
0
-0.5
-0.5
24
125
150
None
Units
V
V
V
V
V
V
mA
°C
°C
Oe
11409 Valley View Road, Eden Prairie, Minnesota 55344 USA
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AD0xx-xx to AD7xx-xx
Absolute Maximum Ratings (NVE AD08x-xx):
Parameter
Supply Voltage
Reverse Battery Voltage
Current Sinking Output Off Voltage
Current Sinking Reverse Output Voltage
Continuous Output Current
4
Operating Temperature Range
Storage Temperature Range
5
Magnetic Field
Notes:
1.
2.
3.
4.
5.
6.
Symbol
VCC
VRBP
I0
TA
TS
H
Min
-40
-65
Max
7
-0.5
33
-0.5
24
125
150
None
Units
V
V
V
V
mA
°C
°C
Oe
Differential = Operate Point – Release Point
Minimum Release Point for AD0xx-xx to AD7xx-xx, except AD08x-xx, = 5 Oe. Minimum Release
Point for AD08x-xx = 3.5 Oe.
Output current must be limited by a series resistor. Exceeding absolute maximum continuous output
current ratings will result in damage to the part. See the figure in the GMR Switch Product Selection
Guide for an output current derating curve.
Thermal power dissipation for the packages used by NVE is 240°C/Watt for the SOIC8 package,
and 320°C/Watt for the MSOP8 and TDFN6 packages. See the Figure on Ambient Temperature vs.
Supply Voltage for derating information. Heat sinking the parts by attaching them to a PCB
improves temperature performance.
There is no maximum magnetic field that will cause damage to the device.
If VCC>6.6V, VREG=5.8V. If VCC<6.6V, VREG= VCC – 0.9V.
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AD8xx-xx to AD9xx-xx
AD8xx-xx to AD9xx-xx
Features:
⇒
⇒
⇒
⇒
⇒
⇒
Short Circuit Detection and Shutoff of External Power Transistor
Precision Magnetic Operate Point
Excellent Temperature and Voltage Performance
Digital Outputs
Frequency Response 0 to 250KHz
Small, Low Profile Surface Mount Packages
Applications:
⇒ General Digital Position Sensing
⇒ Pneumatic Cylinder Position Sensing
⇒ Speed Sensing
Description:
NVE AD8xx and AD9xx GMR Switches are designed specifically for use with an
external high current output transistor in industrial control environments. These parts
provide the same precise magnetic performance NVE’s GMR Switch is known for, with
the additional functionality of short circuit protection (SCP) for the output stage of the
circuit. The protection circuit is designed to shut off the output stage when a short circuit
condition exists; after a time interval specified by the user, the circuit turns back on. If
the short circuit condition still exists, the output stage is again shut off and the cycle
repeats. The use of this sensor, along with external reverse battery protection and
overvoltage protection, results in a “bulletproof” sensor assembly. A functional block
diagram of this sensor is shown below:
VDD
Vreg
Sink1
GMR
Bridge
Comparator
Comparator
ShortH
Sink2
Cap2
SCP Turn
On Delay
Cap
Off State
Timer
Ground
These digital sensors with SCP are available for use with current sinking or current
sourcing outputs, in a range of magnetic field operate points. They are provided in an
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AD8xx-xx to AD9xx-xx
MSOP8 package, with the cross-axis direction of sensitivity. An LED driver to indicate
the presence of the magnetic field is also standard on these products. An SOIC8 package
and standard axis sensitivity are available on a special order basis.
Typical Circuit Configuration:
VDD
RBIAS1
Pin 1
Cap2
VDD
Cap
ShortH
RSHORT
AD821-00
Sink2
Sink1
Ground
Vreg
RBIAS2
Output
RLED
t2 Cap
t1 Cap
VDD
Pin 1
Cap2
VDD
Cap
ShortL
AD921-00
Source
Sink1
Ground
Vreg
Output
t2 Cap
t1 Cap
RLED
RBIAS2
RBIAS1
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AD8xx-xx to AD9xx-xx
Output Transistor Current in Short Circuit mode:
Current (mA)
Output Transistor Current in Short Circuit
300
200
100
t
Notes:
1.
t1
2
Time
The t2 Cap is used to delay the startup of the SCP circuitry, in order to avoid triggering the SCP
circuitry on normal startup transients: see t2 on the graph above. Typical value is 16V, 0.001μF, for
a 35μs delay.
2.
The t1 Cap is used to set the “Off” time of the SCP circuitry; see t1 on the graph above. Typical
value is 16V, 0.01μF, for a 15ms Off time.
3.
The voltage across RSHORT is monitored by the IC; if this voltage exceeds 145mV (typical), the SCP
circuitry is activated. Typical value of RSHORT is 0.47 Ohms, 1/16 watt. This will result in SCP
circuitry turning on at about 300mA of output current.
4.
RBIAS1 and RBIAS2 are used to bias the output transistor. Typical values for RBIAS1 and RBIAS2 are 16K
and 3K, respectively, to supply 1mA drive to the output transistor.
5.
RLED is sized for whatever LED current is required by the user; maximum of 3 mA.
Magnetic Characteristics:
Typical Operate
Point
20
28
40
80
Minimum
Operate Point
15
21
30
60
Maximum
Operate Point
25
32.5
50
100
Minimum
1,2
Differential
5
5
5
5
Maximum
1,2
Differential
14
15
25
35
Note: All Values in Oersteds (Oe); 1 Oe = 1 Gauss in Air
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AD8xx-xx to AD9xx-xx
Electrical Specifications:
Parameter
4
Supply Voltage
Supply Current
2
Current Sinking Output
2
Current Sourcing Output
Output Leakage Current
Sinking Output Saturation Voltage
Sourcing Output Saturation Voltage
6
Regulated Output Voltage
Regulated Output Current
Short High Voltage
Short Low Voltage
Symbol
VCC
ICC
IO
IO
ILEAK
VOL
VOH
VREG
IREG
ShortH
ShortL
Min
4.5
1.75
0
0
3.5
0.12
0.12
Max
30
3.5
2.0
2.0
10
0.4
VCC-2.0
6.0
3.0
0.17
0.17
Units
V
mA
3
mA
3
mA
μA
V
V
V
mA
V
V
Test Condition
Operating
Output Off, VCC=12V
Operating
Operating
Output Off, VCC=12V
Output On, IOL=2mA
Output On, IOL=2mA
Operating
Operating
Output On
Output On
Absolute Maximum Ratings:
Parameter
Supply Voltage
Reverse Battery Voltage
Current Sinking Output Off Voltage
Current Sourcing Output Off Voltage
Current Sinking Reverse Output Voltage
Current Sourcing Reverse Output Voltage
Continuous Output Current
4
Operating Temperature Range
Storage Temperature Range
5
Magnetic Field
Symbol
VCC
VRBP
I0
TA
TS
H
Min
-40
-65
Max
33
-0.5
33
0
-0.5
-0.5
5
125
135
None
Units
V
V
V
V
V
V
mA
°C
°C
Oe
Notes:
1.
Differential = Operate Point – Release Point
2.
Minimum Release Point for AD8xx-xx to AD9xx-xx = 5 Oe.
3.
Output current must be limited by a series resistor. Exceeding absolute maximum continuous output
current ratings will result in damage to the part.
4.
Thermal power dissipation for the packages used by NVE is 240°C/Watt for the SOIC8 package, and
320°C/Watt for the MSOP8 and TDFN6 packages. See the Figure on Ambient Temperature vs. Supply
Voltage for derating information. Heat sinking the parts by attaching them to a PCB improves
temperature performance.
5.
There is no maximum magnetic field that will cause damage to the device.
6.
If VCC>6.6V, VREG=5.8V. If VCC<6.6V, VREG= VCC –0.9V.
NVE Corporation
(800) 467-7141
11409 Valley View Road, Eden Prairie, Minnesota 55344 USA
Email: info@nve.com
11/15/02
Web: www.nve.com
ADH0xx-xx
Features:
⇒
⇒
⇒
⇒
⇒
Precision Low Field Magnetic Operate Point
Excellent Temperature and Voltage Performance
Digital Output
Frequency Response 0 to 250KHz
Small, Low Profile Surface Mount Packages
Applications:
⇒ Low Field Digital Position Sensing
⇒ Pneumatic Cylinder Position Sensing
⇒ Speed Sensing
Description:
The NVE ADH0xx Series GMR Switch uses NVE’s high sensitivity, high temperature
GMR material to provide a very low magnetic field operate point. It offers the same
precision operate points over all temperature and input voltage conditions as our other
GMR Switch products. It is available in standard form as the NVE ADH025-00 with a
magnetic trigger field of 10 Gauss, a current sinking output, and a cross axis
configuration. Custom versions with trigger fields ranging from 6 to 40 Gauss, and
different output options and sensitivity directions could be manufactured for specific
customer requirements; please contact NVE for details.
Note: Functional Block Diagram for the NVE ADH0xx-xx Series sensors is the same as
for the NVE AD0xx-xx sensors.
Output Current, mA
(10V Supply, 1K Load Resistor)
Output Characteristic as a Function of Magnetic
Field, ADH025-00
12
10
8
ON
OFF
OFF
ON
6
4
2
0
-14 -12 -10
-8
-6
-4
-2
0
2
4
6
8
10
12
14
Applied Magnetic Field (Oe)
NVE Corporation
(800) 467-7141
11409 Valley View Road, Eden Prairie, Minnesota 55344 USA
Email: info@nve.com
11/15/02
Web: www.nve.com
Magnetic Characteristics, NVE ADH025-00:
Typical Operate
Minimum
Maximum
Minimum
1
Point
Operate Point
Operate Point
Differential
10
8
12
3.5
Note: All Values in Oersteds (Oe); 1 Oe = 1 Gauss in Air
Maximum
1
Differential
10
Electrical Specifications, NVE ADH0xx-xx:
Parameter
4
Supply Voltage
Supply Current, Single Output
3
Current Sinking Output
Output Leakage Current
Sinking Output Saturation Voltage
Symbol
VCC
ICC
IO
ILEAK
VOL
Min
4.5
3.0
0
Max
30
6.0
20
10
0.4
Units
V
mA
3
mA
μA
V
Test Condition
Operating
Output Off, VCC=12V
Operating
Output Off, VCC=12V
Output On, IOL=20mA
Absolute Maximum Ratings:
Parameter
Supply Voltage
Reverse Battery Voltage
Current Sinking Output Off Voltage
Current Sourcing Output Off Voltage
Current Sinking Reverse Output Voltage
Current Sourcing Reverse Output Voltage
Continuous Output Current
4
Operating Temperature Range
Storage Temperature Range
5
Magnetic Field
Notes:
1.
Symbol
VCC
VRBP
I0
TA
TS
H
Min
-40
-65
Max
33
-33
33
0
-0.5
-0.5
24
125
150
None
Units
V
V
V
V
V
V
mA
°C
°C
Oe
Differential = Operate Point – Release Point
2.
Minimum Release Point for ADH0xx-xx = 2.0 Oe.
3.
Output current must be limited by a series resistor. Exceeding absolute maximum continuous output
current ratings will result in damage to the part. See the figure in the GMR Switch Product Selection
Guide for an output current derating curve.
4.
Thermal power dissipation for the packages used by NVE is 240°C/Watt for the SOIC8 package,
and 320°C/Watt for the MSOP8 and TDFN6 packages. See the Figure on Ambient Temperature vs.
Supply Voltage for derating information. Heat sinking the parts by attaching them to a PCB
improves temperature performance.
5.
There is no maximum magnetic field that will cause damage to the device.
NVE Corporation
(800) 467-7141
11409 Valley View Road, Eden Prairie, Minnesota 55344 USA
Email: info@nve.com
11/15/02
Web: www.nve.com
Data Sheet
ADL-Series
Nanopower Digital Switches
Key Features
• Ultraminiature 1.1 mm x 1.1 mm x 0.45 mm ULLGA package
• Precise Detection of Low Magnetic Fields
• Low Voltage Operation to 2.4 V
• Typical Power Consumption As Low As 72 nW at 2.4 V
• Digital Switch Output
• Continuously Operating or Duty-Cycled Versions
Description
ADL-Series sensors are Giant Magnetoresistive (GMR) Digital Switches designed to run at low voltages and
extremely low currents. The devices are manufactured with NVE’s patented spintronic GMR technology for
unmatched miniaturization, sensitivity, precision, and low power.
NVE’s new ULLGA leadless package measures just 1.1 mm x 1.1 mm x 0.45 mm. Bare die
(0.625 mm x 0.625 mm) are also available for extremely space-critical applications.
Configured as a magnetic “switch,” the output turns on when the magnetic field is applied, and turns off
when the field is removed. The applied magnetic field can be of either polarity, and the magnetic operate
point is extremely stable over supply voltage and temperature.
The ICs consist of a GMR sensor element, CMOS signal processing circuitry to convert the analog sensor
element output to a digital output, and optional oscillator and timing circuitry for power management duty
cycling.
Internally duty cycled versions conserve power. Two different duty-cycle frequencies are available, offering
a trade-off between update frequency and power consumption. An integrated latch ensures the output is
available continuously. The continuously operating versions have a frequency response of 250 kHz.
ADL-Series Digital Switches are ideal for battery-powered devices such as gas and water meters, portable
instruments, or anyplace where an extremely low power device is required. The continuously operating
versions consume less than a milliwatt, and the duty-cycled versions consume less than a microwatt. The
output is current-sinking and can sink up to 100 microamps.
Versions of this part with different magnetic characteristics and duty-cycle update frequencies are available.
Please contact NVE for details.
SB-00-017
February 2012
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
•
www.nve.com
ADL-Series Nanopower Digital Switches
Functional Block Diagrams
VDD
Out
VDD
Out
Oscillator
and Timing
Comparator
GMR
Sensor
Element
Continuously-operating versions
(ADL9xx)
Comparator
GMR
Sensor
Element
Latch
Duty-cycled versions
(ADL0xx/ADL1xx)
Operation
The direction of magnetic field sensitivity is planar to the package. As the field varies in intensity, the digital
output will turn on and off. The user must provide a pull-up resistor on the output terminal.
Sensor Activation With a Permanent Magnet
The diagrams below show two permanent magnet orientations that will activate the sensor in the direction of
sensitivity (planar to the package):
Magnet
Magnet
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
•
www.nve.com
ADL-Series Nanopower Digital Switches
Electrical and Magnetic Specifications
(specifications valid over all operating voltage and temperature ranges):
Parameter
Magnetic Operate Point (ADLx21)
Magnetic Operate Point (ADLx22)
Magnetic Operate Point (ADLx24)
Operate/Release Differential
Operating Voltage (VDD)
Quiescent Current at 2.4 V (ADL0xx)
Quiescent Current at 2.4 V (ADL1xx)
Quiescent Current at 2.4 V (ADL9xx)
Quiescent Current at 3.6 V (ADL0xx)
Quiescent Current at 3.6 V (ADL1xx)
Quiescent Current at 3.6 V (ADL9xx)
Peak Current During Sensor Sampling (3.0 V)
Output Drive Current
VOL at 100 μA Output Drive Current (VDD = 3.6 V)
Output Leakage Current
Update Frequency (ADL0xx)
Update Frequency (ADL1xx)
Operating Frequency (ADL9xx)
Temperature Range of Operation
Min.
15
30
21
2
2.4
Typ.
20
40
28
3.0
0.080
0.030
35
0.200
0.115
85
60
Max.
25
50
34
14
3.6
0.160
0.060
50
0.350
0.160
120
100
Units
|Oersteds|(1)
|Oersteds|(1)
|Oersteds|(1)
|Oersteds|
Volts
μA
μA
μA
μA
μA
μA
μA
μA
Volts
μA
Hz
Hz
kHz
°C
100
0.20
0.005
20
10
250
−40
55
30
125
Absolute Maximum Ratings
Parameter
Applied Magnetic Field
Supply Voltage
Output Off Voltage
Output Current
Maximum Junction Temperature
Storage Temperature
Rating
Unlimited(2)
5.5
5.5
200
+170
−65 to +170
Units
|Oersteds|
Volts
Volts
μA
°C
°C
Notes:
1. 1 Oe (Oersted) = 1 Gauss in air = 0.1 mT
2. Large Magnetic Fields WILL NOT damage NVE GMR Sensors
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
•
www.nve.com
ADL-Series Nanopower Digital Switches
Performance Over Temperature and Power Supply Range
Average current increases, but remains extremely low, over variations in supply voltage. The magnetic
operate and release points are very stable over temperature and supply voltage. Update frequency increases
as supply voltage increases.
Operate and Release Points vs. Temperature
(Typical; 3V Supply)
Average Current vs. Supply Voltage
(Typical)
275
40
250
30
Applied Field (Oe)
Current (nA)
225
200
175
150
125
10
0
-10
-30
-40
2.8
3
3.2
Supply Voltage
3.4
Release Point
-20
75
2.6
Release Point
20
100
2.4
Operate Point
3.6
Operate Point
-40
-25
5
20
35
50
65
80
95
110 125
Temperature (ºC)
Frequency Response vs. Supply Voltage
(Typical; 25ºC)
Operate Point vs. Supply Voltage
(Typical; 25ºC)
60
33
55
32
Magnetic Field (Oe)
Update Frequency (Hz)
-10
50
45
40
35
30
25
31
30
29
28
27
26
20
25
2.4
2.6
NVE Corporation
2.8
3
3.2
Supply Voltage
•
3.4
3.6
2.4
11409 Valley View Road, Eden Prairie, MN 55344-3617
2.6
•
2.8
3
3.2
Supply Voltage
(952) 829-9217
•
3.4
3.6
www.nve.com
Data Sheet
Package Drawings, Dimensions, and Specifications:
4-Lead ULLGA Package
1.1 mm x 1.1 mm x 0.45 mm; Lead Pitch 0.65 mm
Top View
Side View
1.10
0.45
Bottom View
1.10
0.35
0.30
4
2
1
0.10
3
0.60
0.05
0.40
1.10
0.20
1.10
0.65
Direction of Sensitivity
Dimensions in mm; ±0.10 mm
Pinout:
Pin 1
Pin 2
Pin 3
Pin 4
No Connect
VDD
Out
Ground
Part Numbering
The following example shows the ADL-Series part-numbering system:
ADL 0 21 - 14E
Base Part
ADL = Low hysteresis
digital switch
NVE Corporation
•
Duty Cycling
0 = 55 Hz duty cycled
1 = 30 Hz duty cycled
9 = Continuous
Typ. Magnetic
Operate Point
21 = 20 Oe
22 = 40 Oe
24 = 28 Oe
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
Package Type
01 = 0.625 mm x
0.625 mm bare die
14E = 1.1 mm x
1.1 mm RoHS ULLGA
(952) 829-9217
•
www.nve.com
ADL-Series Nanopower Digital Switches
Package Marking Codes:
Part Number
Mark
ADL021-14E
V
ADL022-14E
*
ADL024-14E
C
ADL121-14E
*
ADL122-14E
*
ADL124-14E
D
ADL921-14E
*
ADL922-14E
*
ADL924-14E
*
*Marking not yet assigned
©NVE Corporation
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
SB-00-017
February 2012
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
•
www.nve.com
ADL-Series Nanopower Digital Switches
Datasheet Limitations
The information and data provided in datasheets shall define the specification of the product as agreed between NVE and its customer, unless NVE and
customer have explicitly agreed otherwise in writing. All specifications are based on NVE test protocols. In no event however, shall an agreement be
valid in which the NVE product is deemed to offer functions and qualities beyond those described in the datasheet.
Limited Warranty and Liability
Information in this document is believed to be accurate and reliable. However, NVE does not give any representations or warranties, expressed or
implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information.
In no event shall NVE be liable for any indirect, incidental, punitive, special or consequential damages (including, without limitation, lost profits, lost
savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on
tort (including negligence), warranty, breach of contract or any other legal theory.
Right to Make Changes
NVE reserves the right to make changes to information published in this document including, without limitation, specifications and product descriptions
at any time and without notice. This document supersedes and replaces all information supplied prior to its publication.
Use in Life-Critical or Safety-Critical Applications
Unless NVE and a customer explicitly agree otherwise in writing, NVE products are not designed, authorized or warranted to be suitable for use in life
support, life-critical or safety-critical devices or equipment. NVE accepts no liability for inclusion or use of NVE products in such applications and such
inclusion or use is at the customer’s own risk. Should the customer use NVE products for such application whether authorized by NVE or not, the
customer shall indemnify and hold NVE harmless against all claims and damages.
Applications
Applications described in this datasheet are illustrative only. NVE makes no representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications and products using NVE products, and NVE accepts no liability for any
assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NVE product is suitable and fit for
the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customers. Customers should
provide appropriate design and operating safeguards to minimize the risks associated with their applications and products.
NVE does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party customers. The customer is responsible for all necessary testing for the
customer’s applications and products using NVE products in order to avoid a default of the applications and the products or of the application or use by
customer’s third party customers. NVE accepts no liability in this respect.
Limiting Values
Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the
device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the recommended
operating conditions of the datasheet is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the
quality and reliability of the device.
Terms and Conditions of Sale
In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NVE hereby expressly objects to
applying the customer’s general terms and conditions with regard to the purchase of NVE products by customer.
No Offer to Sell or License
Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication
of any license under any copyrights, patents or other industrial or intellectual property rights.
Export Control
This document as well as the items described herein may be subject to export control regulations. Export might require a prior authorization from national
authorities.
Automotive Qualified Products
Unless the datasheet expressly states that a specific NVE product is automotive qualified, the product is not suitable for automotive use. It is neither
qualified nor tested in accordance with automotive testing or application requirements. NVE accepts no liability for inclusion or use of non-automotive
qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall
use the product without NVE’s warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the
product for automotive applications beyond NVE’s specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies
NVE for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NVE’s
standard warranty and NVE’s product specifications.
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
•
www.nve.com
ADV001 Sensors
ADV001 Latching Bipolar Digital Switches
Features:
•
•
•
•
•
Latching bipolar operation (south field ON, north field OFF)
Extremely low operate points for high sensitivity
Digital switch output
MSOP8 and TDFN6 packages
Cannot be damaged by large magnetic fields
Description:
The ADV001 is a GMR Digital Switch™ product using a unique bipolar output GMR material. This
material allows the sensor to maintain a negative (south pole) operate point and a positive (north pole)
release point. The sensor is ideal for magnetic encoders with alternating north and south poles, or in any
other application where one polarity of field is required to turn the part on and the opposite polarity is
required to turn it off.
The magnetic operate/release points are extremely low—approximately −4 oersteds for the operate
point and +4 oersteds for the release point. Despite the high sensitivity, the operate points are stable
over a temperature range of −40°C to +125°C. The high sensitivity and excellent temperature stability
give the ADV001 better airgap performance and switching precision than other products. The output is
on/off current-sinking. The IC is available in an MSOP8 (part number ADV001-00E) or 2.5 mm x
2.5 mm TDFN6 package (part number ADV001-10E).
The following specifications are valid over all operating voltage and temperature ranges:
Parameter
Magnetic Operate Point1
Magnetic Release Point1
Operate/Release Differential
Operating Supply Voltage (VCC)
Quiescent Supply Current
(VCC = 12 V)
Output Drive Current
VOL
(VCC ≥ 5 V;
20 mA output sink current2)
Frequency Response
Temperature Range of Operation
Notes:
1.
2.
3.
4.
Min.
−10
0
2
4.5
Typ.
−4
4
2.5
0
100
−40
Max.
0
10
12
30
Units
Oersteds
Oersteds
Oersteds
Volts
4.5
20
mA
mA
0.400
Volts
KHz
°C
125
Other operate and release points are available; contact NVE for details.
VOL at VCC = 4.5 V may be higher than 0.400 V.
Large magnetic fields WILL NOT damage NVE GMR Sensors.
1 Oe (Oersted) = 1 Gauss in air = 0.1 mT.
-1www.nve.com phone: 952-829-9217 fax: 952-829-9189
ADV001 Sensors
Functional Block Diagram and Pinout
ADV001-00E
Vcc
Out
N/C
N/C
Output
GMR
Sensor
N/C
N/C
N/C
Ground
Direction of Sensitivity
(“South”)
Operation
The end user must apply a magnetic field planar with the IC package in the direction of sensitivity of
the part (the cross-axis direction). The part is configured for pull down operation when in the “ON”
state. An external pull-up resistor is required.
The following figures illustrate the switching operation:
S
S
a
lftiien
Co
n
N
VdE
N
ON
OFF
ON
OFF
OFF
Figure A
N
Figure B
Figure C
ON
OFF
Figure D
As a south magnetic field is applied to the pin 8 side of the sensor, the digital output will turn on
(Figure B). A north magnetic field applied to the pin 1 side will also turn the output on. The output will
remain latched on (Figure C) until an opposite field is applied (Figure D).
-2www.nve.com phone: 952-829-9217 fax: 952-829-9189
ADV001 Sensors
Package Drawings and Specifications
MSOP8 (ADV001-00E)
.118
(3.00)
.118 (3.00)
.193 (4.90)
NVE
XXX
.118 (3.00)
.021 (.533)
.154 (3.91)
.012 TYP.
.034 (.86)
.040 (1.02)
Dimensions: inches (mm)
.0256 (.65) X 6
.004 (.102) min
.012 (.305) max
Notes:
1. The MSOP8 package has thermal power dissipation of 320°C/Watt in free air.
2. Thermal performance is improved when the package is soldered to a circuit board.
2.5 mm x 2.5 mm TDFN6 (ADV001-10E)
dimensions in mm
Notes:
1. The TDFN6 package has thermal power dissipation of 320°C/Watt in free air.
2. Thermal performance is improved when the package is soldered to a circuit board.
-3www.nve.com phone: 952-829-9217 fax: 952-829-9189
ADV001 Sensors
Package
Pinout
VCC
Ground
Out
MSOP8
(ADV001-00E)
Pin 1
Pin 5
Pin 8
TDFN6
(ADV001-10E)
Pin 1
Pin 4
Pin 6
©NVE Corporation
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent
of the copyright owner.
SB-00-016
February 2012
-4www.nve.com phone: 952-829-9217 fax: 952-829-9189
ADV001 Sensors
Datasheet Limitations
The information and data provided in datasheets shall define the specification of the product as agreed between NVE and its customer, unless NVE
and customer have explicitly agreed otherwise in writing. All specifications are based on NVE test protocols. In no event however, shall an
agreement be valid in which the NVE product is deemed to offer functions and qualities beyond those described in the datasheet.
Limited Warranty and Liability
Information in this document is believed to be accurate and reliable. However, NVE does not give any representations or warranties, expressed or
implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information.
In no event shall NVE be liable for any indirect, incidental, punitive, special or consequential damages (including, without limitation, lost profits,
lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are
based on tort (including negligence), warranty, breach of contract or any other legal theory.
Right to Make Changes
NVE reserves the right to make changes to information published in this document including, without limitation, specifications and product
descriptions at any time and without notice. This document supersedes and replaces all information supplied prior to its publication.
Use in Life-Critical or Safety-Critical Applications
Unless NVE and a customer explicitly agree otherwise in writing, NVE products are not designed, authorized or warranted to be suitable for use in
life support, life-critical or safety-critical devices or equipment. NVE accepts no liability for inclusion or use of NVE products in such applications
and such inclusion or use is at the customer’s own risk. Should the customer use NVE products for such application whether authorized by NVE or
not, the customer shall indemnify and hold NVE harmless against all claims and damages.
Applications
Applications described in this datasheet are illustrative only. NVE makes no representation or warranty that such applications will be suitable for
the specified use without further testing or modification.
Customers are responsible for the design and operation of their applications and products using NVE products, and NVE accepts no liability for
any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NVE product is suitable
and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customers.
Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products.
NVE does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party customers. The customer is responsible for all necessary testing for the
customer’s applications and products using NVE products in order to avoid a default of the applications and the products or of the application or
use by customer’s third party customers. NVE accepts no liability in this respect.
Limiting Values
Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the
device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the recommended
operating conditions of the datasheet is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the
quality and reliability of the device.
Terms and Conditions of Sale
In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NVE hereby expressly objects
to applying the customer’s general terms and conditions with regard to the purchase of NVE products by customer.
No Offer to Sell or License
Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or
implication of any license under any copyrights, patents or other industrial or intellectual property rights.
Export Control
This document as well as the items described herein may be subject to export control regulations. Export might require a prior authorization from
national authorities.
Automotive Qualified Products
Unless the datasheet expressly states that a specific NVE product is automotive qualified, the product is not suitable for automotive use. It is
neither qualified nor tested in accordance with automotive testing or application requirements. NVE accepts no liability for inclusion or use of nonautomotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer
(a) shall use the product without NVE’s warranty of the product for such automotive applications, use and specifications, and (b) whenever
customer uses the product for automotive applications beyond NVE’s specifications such use shall be solely at customer’s own risk, and
(c) customer fully indemnifies NVE for any liability, damages or failed product claims resulting from customer design and use of the product for
automotive applications beyond NVE’s standard warranty and NVE’s product specifications.
-5www.nve.com phone: 952-829-9217 fax: 952-829-9189
AFL Sensors
AFL-Series Sensors—Low Power, Low Voltage Digital Switches
Features:
•
•
•
•
•
•
•
Low voltage operation to 0.9 V
Low current consumption
Digital switch output
Precise detection of low magnetic fields
Ultra-small packages (MSOP8 and TDFN6)
Available in millimeter-scale die
Cannot be damaged by large magnetic fields
Description:
NVE’s AFL-Series Sensors are digital switches designed to run at very low voltages and currents. The
parts can operate from a single battery. The output is configured as a switch to detect magnetic fields,
switching on at a specified magnetic field, and off when the field is removed. Current-sinking or
current-sourcing output configurations are available. Both configurations supply up to 100 µA. An
external pull-up or pull-down resistor is required. The devices are available in MSOP8 or TDFN6
packages, or in die form.
AFL Product Selection Guide
AFL-Series part numbers follow the general form below. The first “x” in the part number specifies the
voltage range, the second “x” denotes the output configuration, the third “x” specifies the magnetic
operate point, and the last character pair specifies the package. The following sections define these
options.
AFLxxx-xx
Voltage
Range of
Operation
Package Type
Output
Magnetic
Operate Point
-1www.nve.com phone: 952-829-9217 fax: 952-829-9189
AFL Sensors
Voltage Range of Operation
The first numeric digit of the part number in the form AFLxxx-xx specifies the operating voltage
range. Four ranges are available:
NVE AFL xxx-xx
Number
Voltage Range of Operation
0
0.9 V – 1.3 V
1
1.8 V – 2.5 V
2
2.7 V – 3.6 V
3
4.5 V – 5.5 V
The quiescent supply current specifications apply within these ranges. Parts may be operated at higher
voltage than shown up to a maximum of 7 V, but the quiescent current will increase. For example, a
“1xx-xx” part can be operated up to 3.0 V although it might it exceed the quiescent current
specification.
NVE can supply custom parts for different voltage ranges. Minimum order quantities, special pricing,
NRE charges, and lead times may apply. Please contact NVE with your requirements.
Output
The second digit of the part number specifies the output configuration. Four output types are available:
NVE AFL xxx-xx
Number
Output Type
0
Normally Off, Current Sink
1
Normally On, Current Sink
2
Normally On, Current Source
3
Normally Off, Current Source
“Normally Off” means that with no magnetic field applied the output will not provide current; when
the magnetic field is applied, the output current will turn on. “Normally On” is opposite. Parts will sink
or source up to 100 µA. Output current is not included in the quiescent current specification.
-2www.nve.com phone: 952-829-9217 fax: 952-829-9189
AFL Sensors
Magnetic Operate Point and Direction of Sensitivity
Standard magnetic operate points are shown in the table below. Non-standard magnetic operate points
are available, but special pricing, minimum order quantities, NRE charges, and lead times may apply.
NVE AFL xxx-xx
Number
Magnetic Operate Point
0
10 Oe
1
20 Oe
2
28 Oe
3
40 Oe
4
80 Oe
5
7 Oe
All AFL-Series parts feature cross-axis sensitivity as shown in the following diagrams:
VCC
Output
Test
Test
VCC
Ground
Test
Cross Axis
Output
Cross Axis
Ground
N/C
Test
Test
TDFN 6
Test
MSOP 8
Test
Package Types
AFL-Series parts are available in two different packages: an 8-pin Micro Small Outline Package
(MSOP) and a 6-pin ultra-miniature leadless TDFN package. Parts are also available in die form.
Package type part numbers are shown in the table below; drawings are at the end of this specification.
NVE AFL xxx-xx
Number
Package
Type
00
MSOP8
01
IC Only
10
TDFN6
Available Parts
The following parts in this series are currently available:
AFL000-00E
AFL001-10E
AFL020-00E
AFL100-10E
AFL300-00E
AFL000-10E
AFL002-10E
AFL030-00E
AFL103-01
AFL000-01
AFL005-10E
AFL100-00E
AFL200-00E
Notes:
1. Part types are continuosly added. Contact factory for
current part availability.
2. The “E” suffix indicates a lead-free, RoHS-compliant
package.
3. All die versions (-01 suffix) are lead-free and RoHS
compliant.
-3www.nve.com phone: 952-829-9217 fax: 952-829-9189
AFL Sensors
Electrical and Magnetic Specifications
Parameter
Magnetic Operate Point (AFLxx0-xx)
Operate/Release Differential (AFLxx0-xx)
Magnetic Operate Point (AFLxx1-xx)
Operate/Release Differential (AFLxx1-xx)
Magnetic Operate Point (AFLxx2-xx)
Operate/Release Differential (AFLxx2-xx)
Magnetic Operate Point (AFLxx5-xx)
Operate/Release Differential (AFLxx5-xx)
Operating Voltage (AFL0xx-xx)
Operating Voltage (AFL1xx-xx)
Operating Voltage (AFL2xx-xx)
Operating Voltage (AFL3xx-xx)
Quiescent Current (AFL000-xx)
Quiescent Current (AFL020-xx)
Quiescent Current (AFL030-xx)
Quiescent Current (AFL100-xx)
Quiescent Current (AFL200-xx)
Quiescent Current (AFL300-xx)
Maximum Output Drive Current (Sink or Source)
VOL at 100 μA Output Drive Current
Min.
7
1
15
3
21
3
4
1
0.9
1.8
2.7
4.5
20
30
15
25
30
30
100
Typ.
10
20
28
7
1.1
2.2
3.2
5.0
35
50
35
35
35
40
Max.
13
6
25
10
34
10
10
6
1.3
2.5
3.6
5.5
55
75
55
45
45
50
0.200
VCC −
0.150
100
−20
VOH at 100 μA Output Drive Current
Frequency Response
Temperature Range of Operation
Notes:
1. Large magnetic fields WILL NOT damage NVE GMR Sensors
2. One Oersted (Oe) = 1 Gauss in air = 0.1 mT
-4www.nve.com phone: 952-829-9217 fax: 952-829-9189
Units
|Oersteds|
|Oersteds|
|Oersteds|
|Oersteds|
|Oersteds|
|Oersteds|
|Oersteds|
|Oersteds|
Volts
Volts
Volts
Volts
μA
μA
μA
μA
μA
μA
μA
Volts
Volts
85
KHz
°C
AFL Sensors
Operation
The magnetic field must be applied planar to the package in the direction of sensitivity. When the
magnetic field reaches the magnetic operate point, the output will turn on. There should be a pull-up or
pull-down resistor on the output terminal.
Fuctional Diagrams and Pinout
VCC
(Pin 1)
AFL000-00
Output
N/C
Ground
GMR Bridge
Test
Test
Test
Test
Direction of Sensitivity
VCC
(Pin 1)
Output
AFL000-10
Test
Ground
GMR
Bridge
Test
Test
-5www.nve.com phone: 952-829-9217 fax: 952-829-9189
AFL Sensors
IC Drawing and Layout
The IC is approximately 1.45 mm x 1.5 mm. A die drawing is shown below:
Direction of Sensitivity
-6www.nve.com phone: 952-829-9217 fax: 952-829-9189
AFL Sensors
Package Drawings and Specifications
MSOP8
.118
(3.00)
.118 (3.00)
.193 (4.90)
NVE
XXX
.118 (3.00)
.021 (.533)
.154 (3.91)
.012 TYP.
.034 (.86)
.040 (1.02)
Dimensions: inches (mm)
.0256 (.65) X 6
.004 (.102) min
.012 (.305) max
Notes:
1. The MSOP8 package has thermal power dissipation of 320°C/Watt in free air.
2. Thermal performance is improved when the package is soldered to a circuit board.
2.5 mm x 2.5 mm TDFN6
dimensions in mm
Notes:
1. The TDFN6 package has thermal power dissipation of 320°C/Watt in free air.
2. Thermal performance is improved when the package is soldered to a circuit board.
-7www.nve.com phone: 952-829-9217 fax: 952-829-9189
AFL Sensors
The complete part number will not fit on TDFN6 or MSOP8 packages, so a three-digit code is used. The package codes are
listed below:
Part Number
AFL000-00E
AFL000-10E
AFL001-10E
AFL002-10E
AFL005-10E
AFL020-00E
AFL030-00E
AFL100-00E
AFL100-10E
AFL200-00E
AFL300-00E
Marking Code
PBBe
QBBe
QBXe
QBLe
QBKe
PBCe
PBDe
PBFe
QBFe
PBGe
PBHe
©NVE Corporation
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
SB-00-015
February 2012
-8www.nve.com phone: 952-829-9217 fax: 952-829-9189
AFL Sensors
Datasheet Limitations
The information and data provided in datasheets shall define the specification of the product as agreed between NVE and its customer, unless NVE
and customer have explicitly agreed otherwise in writing. All specifications are based on NVE test protocols. In no event however, shall an
agreement be valid in which the NVE product is deemed to offer functions and qualities beyond those described in the datasheet.
Limited Warranty and Liability
Information in this document is believed to be accurate and reliable. However, NVE does not give any representations or warranties, expressed or
implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information.
In no event shall NVE be liable for any indirect, incidental, punitive, special or consequential damages (including, without limitation, lost profits,
lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are
based on tort (including negligence), warranty, breach of contract or any other legal theory.
Right to Make Changes
NVE reserves the right to make changes to information published in this document including, without limitation, specifications and product
descriptions at any time and without notice. This document supersedes and replaces all information supplied prior to its publication.
Use in Life-Critical or Safety-Critical Applications
Unless NVE and a customer explicitly agree otherwise in writing, NVE products are not designed, authorized or warranted to be suitable for use in
life support, life-critical or safety-critical devices or equipment. NVE accepts no liability for inclusion or use of NVE products in such applications
and such inclusion or use is at the customer’s own risk. Should the customer use NVE products for such application whether authorized by NVE or
not, the customer shall indemnify and hold NVE harmless against all claims and damages.
Applications
Applications described in this datasheet are illustrative only. NVE makes no representation or warranty that such applications will be suitable for
the specified use without further testing or modification.
Customers are responsible for the design and operation of their applications and products using NVE products, and NVE accepts no liability for
any assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NVE product is suitable
and fit for the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customers.
Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products.
NVE does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party customers. The customer is responsible for all necessary testing for the
customer’s applications and products using NVE products in order to avoid a default of the applications and the products or of the application or
use by customer’s third party customers. NVE accepts no liability in this respect.
Limiting Values
Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the
device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the recommended
operating conditions of the datasheet is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the
quality and reliability of the device.
Terms and Conditions of Sale
In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NVE hereby expressly objects
to applying the customer’s general terms and conditions with regard to the purchase of NVE products by customer.
No Offer to Sell or License
Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or
implication of any license under any copyrights, patents or other industrial or intellectual property rights.
Export Control
This document as well as the items described herein may be subject to export control regulations. Export might require a prior authorization from
national authorities.
Automotive Qualified Products
Unless the datasheet expressly states that a specific NVE product is automotive qualified, the product is not suitable for automotive use. It is
neither qualified nor tested in accordance with automotive testing or application requirements. NVE accepts no liability for inclusion or use of nonautomotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer
(a) shall use the product without NVE’s warranty of the product for such automotive applications, use and specifications, and (b) whenever
customer uses the product for automotive applications beyond NVE’s specifications such use shall be solely at customer’s own risk, and
(c) customer fully indemnifies NVE for any liability, damages or failed product claims resulting from customer design and use of the product for
automotive applications beyond NVE’s standard warranty and NVE’s product specifications.
-9www.nve.com phone: 952-829-9217 fax: 952-829-9189
AHLxxx-14E Sensors
AHLxxx-14E
Nanopower Digital Switch
Key Features
• Low Voltage Operation to 0.9 V
• Extremely Low Power Consumption
• Digital Switch Output
• Precise Detection of Low Magnetic Fields
• Ultraminiature Package
Description
The AHLxxx-14E series sensors are Giant Magnetoresistive (GMR) Digital Switch devices designed to run
at low voltages and extremely low currents. The devices are manufactured with NVE’s patented spintronic
GMR technology for unmatched miniaturization, sensitivity, precision, and low power.
The output is configured as a magnetic “switch” where the output turns on when the magnetic field is
applied, and turns off when the field is removed. The IC is available for continuous duty operation, or
internally duty cycled at approximately 0.1% to conserve power. An integrated latch ensures the output is
available continuously in duty-cycled mode. The part is available in NVE’s new ULLGA leadless package
measuring just 1.1 mm x 1.1 mm x 0.45 mm.
The AHLxxx-14E parts are ideal for battery-powered devices such as gas and water meters, portable
instruments, or any place where an extremely low power device is required. The applied magnetic field can
be of either polarity, and in the duty-cycled operating mode the part consumes less than 1 microwatt. The
magnetic operate point is extremely stable over supply voltage and temperature variations. The output is
current-sinking, and can sink up to 100 microamps.
The product consists of an approximately 0.6 mm x 0.6 mm die containing a GMR sensor element, CMOS
signal processing circuitry to convert the analog sensor element output to a digital output, and an oscillator
and timing circuit for duty cycling. The plastic package is ultra-small, ultra-low profile, surface mount, lead
free, and RoHS compliant. Bare die are also available for extremely space-critical applications.
Versions of this part with different magnetic characteristics are available. Please contact NVE for details.
SB-00-027
February 2012
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
•
www.nve.com
AHLxxx-14E Sensors
Functional Block Diagrams
Out
VDD
GMR
Sensor
Element
Comparator
AHL9xx-14E
VDD
Out
Oscillator
and Timing
GMR
Sensor
Element
Comparator
Latch
AHL0xx-14E
Operation
The direction of magnetic field sensitivity is planar to the package. As the field varies in intensity, the digital
output will turn on and off. The user must provide a pull-up resistor on the output terminal.
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
•
www.nve.com
AHLxxx-14E Sensors
Sensor Activation With a Permanent Magnet
The diagrams below show two permanent magnet orientations that will activate the sensor in the direction of
sensitivity (planar to the package):
Magnet
Magnet
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
•
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AHLxxx-14E Sensors
Electrical and Magnetic Specifications
(specifications valid over all operating voltage and temperature ranges unless otherwise noted):
Parameter
Magnetic Operate Point (AHLx21-14E)
Magnetic Operate Point (AHLx24-14E)
Magnetic Operate Point (AHLx25-14E)
Magnetic Release Point
Hysteresis
Operating Voltage (VDD)(3)
Quiescent Current at 0.9 V (AHL0xx-14E)
Quiescent Current at 0.9 V (AHL9xx-14E)
Quiescent Current at 1.4 V (AHL0xx-14E)
Quiescent Current at 1.4 V (AHL9xx-14E)
Quiescent Current at 2.4 V (AHL0xx-14E)
Quiescent Current at 2.4 V (AHL9xx-14E)
Peak Current During Sensor Sampling
(AHL0xx-14E, 1.4 V)
Output Drive Current
VOL at 100 μA Output Drive Current
(VDD = 1.25 V)
Output Leakage Current
Frequency Response at 0.9V (AHL0xx-14E)
Frequency Response at 1.4V (AHL0xx-14E)
Frequency Response at 2.4V (AHL0xx-14E)
Frequency Response (AHL9xx-14E)
Temperature Range of Operation(3)
Min.
15
21
7
2.0
0.5
0.9
Typ.
20
28
10
Max.
25
34
14
1.25
0.032
15
0.095
35
0.460
75
25
12
2.4
0.060
35
0.150
55
0.650
110
55
0.05
0.20
100
30
80
120
40
110
260
100K
−40
0.5
60
160
375
85
Units
|Oersteds|(1)
|Oersteds|(1)
|Oersteds|(1)
|Oersteds|(1)
|Oersteds|(1)
Volts
μA
μA
μA
μA
μA
μA
μA
μA
Volts
μA
Hz
Hz
Hz
Hz
°C
Absolute Maximum Ratings
Parameter
Applied Magnetic Field
Supply Voltage
Output Off Voltage
Output Current
Maximum Junction Temperature
Storage Temperature
Notes:
1.
2.
3.
Rating
Unlimited(2)
5.5
5.5
200
+170
−65 to +170
Units
|Oersteds|
Volts
Volts
μA
°C
°C
1 Oe (Oersted) = 1 Gauss in air = 0.1 mT.
Large magnetic fields WILL NOT damage NVE GMR sensors.
Operation from −20°C to −40°C at supply voltages less than 1.0 V may not meet specifications.
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
•
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AHLxxx-14E Sensors
Typical Performance Characteristics
Supply Current vs. Supply Voltage, 25˚C, AHL9xx
Magnetic Operate Point vs. Supply V oltage
25˚C, AHLxxx-14E
70
Magnetic Operate Point (Oe)
12
Supply Current (μA)
60
50
40
30
20
10
0
11
10
9
8
0.9
1.2
1.5
1.8
Supply Voltage
2.1
2.4
0.9
1.5
2.1
2.4
Magnetic Operate Point vs. T emperature,
1.15V, AHLxxx-14E
450
12
400
Magnetic Operate Point
350
300
250
200
150
100
11
10
9
50
0
8
0.9
1.2
1.5
1.8
2.1
2.4
-40 -30 -20 -10
10 20 30 40
Temperature (˚C)
0
Supply Voltage
Frequency Response vs. Supply Voltage, 25˚C, AHL0xx
50
60
70
80
90
Supply Voltage vs. Temperature Derating Curve
300
1.2
250
Minimum Supply Voltag e
Frequency Response (Hz)
1.8
Supply Voltage
Average Supply Current vs. Supply Voltage, 25˚C
AHL0xx-14E
Average Current Requirement (nA)
1.2
200
150
100
50
0
1.1
1
0.9
0.8
0.9
1.2
NVE Corporation
1.5
1.8
Supply Voltage
•
2.1
2.4
-40
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0
•
20
40
Temperature (˚C)
(952) 829-9217
60
•
80
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AHLxxx-14E Sensors
Package Drawings, Dimensions, and Specifications:
4-Lead ULLGA Package
1.1 mm x 1.1 mm x 0.45 mm; Lead Pitch 0.65 mm
Top View
Side View
1.10
0.45
Bottom View
1.10
0.35
0.30
4
2
1
0.10
3
0.60
0.05
0.40
1.10
0.20
1.10
0.65
Direction of Sensitivity
Dimensions in mm; ±0.10 mm
Pinout:
Pin 1
Pin 2
Pin 3
Pin 4
No Connect
VDD
Out
Ground
©NVE Corporation
All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner.
SB-00-027
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
February 2012
• www.nve.com
AHLxxx-14E Sensors
Datasheet Limitations
The information and data provided in datasheets shall define the specification of the product as agreed between NVE and its customer, unless NVE and
customer have explicitly agreed otherwise in writing. All specifications are based on NVE test protocols. In no event however, shall an agreement be
valid in which the NVE product is deemed to offer functions and qualities beyond those described in the datasheet.
Limited Warranty and Liability
Information in this document is believed to be accurate and reliable. However, NVE does not give any representations or warranties, expressed or
implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information.
In no event shall NVE be liable for any indirect, incidental, punitive, special or consequential damages (including, without limitation, lost profits, lost
savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on
tort (including negligence), warranty, breach of contract or any other legal theory.
Right to Make Changes
NVE reserves the right to make changes to information published in this document including, without limitation, specifications and product descriptions
at any time and without notice. This document supersedes and replaces all information supplied prior to its publication.
Use in Life-Critical or Safety-Critical Applications
Unless NVE and a customer explicitly agree otherwise in writing, NVE products are not designed, authorized or warranted to be suitable for use in life
support, life-critical or safety-critical devices or equipment. NVE accepts no liability for inclusion or use of NVE products in such applications and such
inclusion or use is at the customer’s own risk. Should the customer use NVE products for such application whether authorized by NVE or not, the
customer shall indemnify and hold NVE harmless against all claims and damages.
Applications
Applications described in this datasheet are illustrative only. NVE makes no representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications and products using NVE products, and NVE accepts no liability for any
assistance with applications or customer product design. It is customer’s sole responsibility to determine whether the NVE product is suitable and fit for
the customer’s applications and products planned, as well as for the planned application and use of customer’s third party customers. Customers should
provide appropriate design and operating safeguards to minimize the risks associated with their applications and products.
NVE does not accept any liability related to any default, damage, costs or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party customers. The customer is responsible for all necessary testing for the
customer’s applications and products using NVE products in order to avoid a default of the applications and the products or of the application or use by
customer’s third party customers. NVE accepts no liability in this respect.
Limiting Values
Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) will cause permanent damage to the
device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the recommended
operating conditions of the datasheet is not warranted. Constant or repeated exposure to limiting values will permanently and irreversibly affect the
quality and reliability of the device.
Terms and Conditions of Sale
In case an individual agreement is concluded only the terms and conditions of the respective agreement shall apply. NVE hereby expressly objects to
applying the customer’s general terms and conditions with regard to the purchase of NVE products by customer.
No Offer to Sell or License
Nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication
of any license under any copyrights, patents or other industrial or intellectual property rights.
Export Control
This document as well as the items described herein may be subject to export control regulations. Export might require a prior authorization from national
authorities.
Automotive Qualified Products
Unless the datasheet expressly states that a specific NVE product is automotive qualified, the product is not suitable for automotive use. It is neither
qualified nor tested in accordance with automotive testing or application requirements. NVE accepts no liability for inclusion or use of non-automotive
qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall
use the product without NVE’s warranty of the product for such automotive applications, use and specifications, and (b) whenever customer uses the
product for automotive applications beyond NVE’s specifications such use shall be solely at customer’s own risk, and (c) customer fully indemnifies
NVE for any liability, damages or failed product claims resulting from customer design and use of the product for automotive applications beyond NVE’s
standard warranty and NVE’s product specifications.
NVE Corporation
•
11409 Valley View Road, Eden Prairie, MN 55344-3617
•
(952) 829-9217
•
www.nve.com