Data Sheet
LINEAR HALL-EFFECT IC
AH49E
General Description
Features
The AH49E is a small, versatile linear Hall-effect
device that is operated by the magnetic field from a
permanent magnet or an electromagnet. The output
voltage is set by the supply voltage and varies in proportion to the strength of the magnetic field.
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The integrated circuitry features low noise output,
which makes it unnecessary to use external filtering. It
also includes precision resistors to provide increased
temperature stability and accuracy. The operating temperature range of these linear Hall sensors is -40oC to
85oC, appropriate for commercial, consumer and
industrial applications.
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·
Miniature Construction
Power Consumption of 3.5mA at VCC=5V for
Energy Efficiency
Single Current Sourcing Output
Linear Output for Circuit Design Flexibility
Low Noise Output Virtually Eliminates the Need
for Filtering
A Stable and Accurate Output
Temperature Range of -40oC to 85oC
Responds to Either Positive or Negative Gauss
Applications
The AH49E is available in standard TO-92S and SOT23-3 packages.
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Current Sensing
Motor Control
Position Sensing
Magnetic Code Reading
Ferrous Metal Detector
Vibration Sensing
Liquid Level Sensing
Weight Sensing
SOT-23-3
TO-92S
Figure 1. Package Types of AH49E
Aug. 2010 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
1
Data Sheet
LINEAR HALL-EFFECT IC
AH49E
Pin Configuration
Z3 Package
N Package
(TO-92S )
(SOT-23-3 )
GND
3
3
OUT
2
GND
1
VCC
1
2
VCC
OUT
(Top View)
(Front View)
Figure 2. Pin Configuration of AH49E
Pin Description
Pin Number
TO-92S
SOT-23-3
Pin Name
Function
1
1
VCC
Supply voltage
2
3
GND
Ground pin
3
2
OUT
Output
Aug. 2010 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
2
Data Sheet
LINEAR HALL-EFFECT IC
AH49E
Functional Block Diagram
1 (1)
HALL
Sensor
3 (2)
Amplifier
VCC
OUT
65µA
Typ.
2 (3)
GND
A (B)
A for TO-92S
B for SOT-23-3
Figure 3. Functional Block Diagram of AH49E
Ordering Information
AH49E
Package
TO-92S
SOT-23-3
-
Circuit Type
E1: Lead Free
G1: Green
Packages
Z3: TO-92S
N: SOT-23-3
Blank: Bulk
TR: Tape and Reel
Temperature
Range
-40 to 85oC
Part Number
Lead Free
AH49EZ3-E1
Green
AH49EZ3-G1
AH49ENTR-G1
Marking ID
Lead Free
AH49E
Green
AH49G
GJ1
Packing Type
Bulk
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Products with
"G1" suffix are available in green package.
Aug. 2010 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
3
Data Sheet
LINEAR HALL-EFFECT IC
AH49E
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
Supply Voltage
VCC
8
V
Output Current
IO
10
mA
Operating Temperature
TA
-40 to 100
o
TSTG
-50 to 150
oC
3000
V
Storage Temperature Range
ESD (Human Body Model)
C
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended
periods may affect device reliability.
Recommended Operating Conditions
Parameter
Symbol
Min
Max
Unit
Supply Voltage
VCC
3.0
6.5
V
Operating Temperature
TOP
-40
85
oC
Aug. 2010 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
4
Data Sheet
LINEAR HALL-EFFECT IC
AH49E
Electrical Characteristics
(VCC=5V, TA=25oC, unless otherwise specified.)
Parameter
Supply Current
Quiescent Output Voltage
Symbol
Conditions
ICC
VNULL
Output Voltage Sensitivity
Output Voltage Span
VOS
Output Resistor
RO
Magnetic Field Range
B
Typ
Max
Unit
3.5
4.5
mA
@ B=0GS
2.25
2.5
2.75
V
B=0GS to ±1000GS
1.1
1.6
2.1
mV/GS
1.0 to
(VCC-1.0)
0.8 to
(VCC-0.8)
60
±650
Linearity of Span
Output Noise
Min
BW=10Hz to 10kHz
Aug. 2010 Rev. 1. 3
V
120
Ω
±1000
GS
0.7
%
90
µV
BCD Semiconductor Manufacturing Limited
5
Data Sheet
LINEAR HALL-EFFECT IC
AH49E
Transfer Characteristics (VCC=5V)
boosting further if the changing frequency of the
magnetic field is high.
When there is no outside magnetic field (B=0GS), the
quiescent output voltage is one-half the supply voltage
in general.
For TO-92S package, if a south magnetic pole
approches to the front face (the side with marking ID)
of the Hall effect sensor, the circuit will drive the
output voltage higher. Contrary, a north magnetic pole
will drive the output voltage lower. The variations of
voltage level up or down are symmetrical. Due to
SOT-23-3 is reversed packaging with TO-92S, so the
magnetic performance is also reversed. Therefor, if
the reversed magnetic pole approches to the front face
(the side with marking ID), the output is the same as
TO-92S package.
.
Greatest magnetic sensitivity is obtained with a supply
voltage of 6V, but at the cost of increased supply
current and a slight loss of output symmetry. So, it is
not recommended to work in such condition unless the
output voltage magnitude is a main issue. The output
signal can be capacitively coupled to an amplifier for
V
Typical
Output
Voltage
4.0 V
2.5 V
1.0 V
-1000
-500
0
B (Gauss)
500
1000
Figure 4. The Transfer Characteristics of AH49E
South Pole
North Pole
TO-92S Package
SOT-23-3 Package
Aug. 2010 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
6
Data Sheet
LINEAR HALL-EFFECT IC
AH49E
Typical Performance Characteristics
5
5
B=0GS
No load
VCC=5V
No load
4
3
3
VOUT(V)
VOUT(V)
4
2
2
1
1
0
0
-1000
-500
0
500
1000
2
3
4
5
6
7
8
VCC(V)
B(GS)
Figure 5. Output Voltage vs. Magnetic Field
Figure 6. Output Voltage vs. Supply Voltage
5
VCC=5V
B=0GS
No load
4
VOUT(V)
3
2
1
0
-40
0
40
80
120
O
TA( C)
Figure 7. Output Voltage vs. Ambient Temperature
Aug. 2010 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
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Data Sheet
LINEAR HALL-EFFECT IC
AH49E
Mechanical Dimensions
TO-92S
°
°
44
46
Unit: mm(inch)
0.710(0.028)
0.810(0.032)
1.480(0.058)
1.680(0.066)
4.000(0.157)
4.200(0.165)
1.350(0.053)
1.050(0.041)
2.200(0.087)
1.900(0.075)
3.080(0.121)
3.280(0.129)
Package Sensor
Location
2.200(0.087)
2.400(0.094)
0.440(0.017)
TYP
13.500(0.531)
14.500(0.571)
1.270(0.050)
TYP
Aug. 2010 Rev. 1. 3
0.380(0.015)
TYP
BCD Semiconductor Manufacturing Limited
8
Data Sheet
LINEAR HALL-EFFECT IC
AH49E
Mechanical Dimensions (Continued)
SOT-23-3
Unit: mm(inch)
2.820(0.111)
3.020(0.119)
0.100(0.004)
0.200(0.008)
0.300(0.012)
0.600(0.024)
1.300(0.051)
1.600(0.063)
1.500(0.059)
1.700(0.067)
Package Sensor Location
2.650(0.104)
2.950(0.116)
(For Hall IC)
0.200(0.008)
0.685(0.027)
0.985(0.039)
1.800(0.071)
2.000(0.079)
0
8
0.300(0.012)
0.500(0.020)
1.450(0.057)
MAX.
0.950(0.037)
TYP
°
°
0.000(0.000)
0.150(0.006)
0.900(0.035)
1.300(0.051)
Aug. 2010 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
9
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