Data Sheet
LINEAR HALL EFFECT IC
AH49H
General Description
Features
The AH49H 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.
•
•
The integrated circuitry features low noise output,
which makes it unnecessary to use external filtering
components. It also includes precision resistors to
provide increased temperature stability and accuracy.
The operating temperature range of these linear Hall
sensors is -40°C to 105°C, appropriate for
commercial, consumer, and industrial environments.
•
•
•
•
•
•
•
•
•
•
Miniature Construction
Power Consumption of 2mA at VCC=3.3V 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: -40°C to 105°C
Responds to Either Positive or Negative Gauss
The Maximum Instantaneous Supply Voltage
Up to 50V
High ESD Rating: 6000V (Human Body Model)
400V (Machine Model)
The AH49H is available in standard TO-92S-3 and
SOT-23-3 packages.
Application
•
•
•
•
•
•
•
•
•
TO-92S-3
Current Sensing
Motor Control
Position Sensing
Magnetic Code Reading
Rotary Encoder
Ferrous Metal Detector
Vibration Sensing
Liquid Level Sensing
Weight Sensing
SOT-23-3
Figure 1. Package Types of AH49H
Jun. 2013
Rev. 1.2
BCD Semiconductor Manufacturing Limited
Data Sheet
LINEAR HALL EFFECT IC
AH49H
Pin Configuration
Z3 Package
(TO-92S-3)
N Package
(SOT-23-3)
GND
3
3
OUT
2
GND
1
VCC
(Front View)
1
2
VCC
OUT
(Top View)
Figure 2. Pin Configuration of AH49H
Pin Description
Pin Number
Pin Name
Function
TO-92S-3
SOT-23-3
1
1
VCC
Power supply pin
2
3
GND
Ground pin
3
2
OUT
Output pin
Jun. 2013
Rev. 1.2
BCD Semiconductor Manufacturing Limited
Data Sheet
LINEAR HALL EFFECT IC
AH49H
Functional Block Diagram
Figure 3. Functional Block Diagram of AH49H
Ordering Information
AH49H
-
G1: Green
Circuit Type
Blank: Bulk
TR: Tape & Reel
Package
Z3: TO-92S-3
N: SOT-23-3
Package
TO-92S-3
SOT-23-3
Temperature
Range
-40 to 105°C
Part Number
AH49HZ3-G1
AH49HNTR-G1
Marking ID
Packing Type
49HG
Bulk
GT7
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" in the part number, are RoHS compliant and
green.
Jun. 2013
Rev. 1.2
BCD Semiconductor Manufacturing Limited
Data Sheet
LINEAR HALL EFFECT IC
AH49H
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
VCC
10
V
VCC_INST
50
V
Supply Voltage
Instantaneous Supply Voltage
TO-92S-3
400
Power Dissipation
PD
mW
SOT-23-3
230
Ambient Temperature
TA
-40 to 125
°C
Storage Temperature
TSTG
-50 to 150
°C
ESD (Human Body Model)
6000
V
ESD (Machine Mode)
400
V
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 (TA=25°C)
Parameter
Symbol
Min
Max
Unit
Supply Voltage
VCC
3
8
V
Operating Temperature
TOP
-40
105
°C
Jun. 2013
Rev. 1.2
BCD Semiconductor Manufacturing Limited
Data Sheet
LINEAR HALL EFFECT IC
AH49H
Electrical Characteristics
VCC=3.3V, TA=25°C, unless otherwise specified.
Parameter
Symbol
Supply Current
Quiescent
Output
Voltage
Output
Voltage
Sensitivity
Output Voltage Span
Output Resistor
Linear Magnetic Range
Conditions
ICC
VNULL
B=0 (Gauss)
VSEN
B=±600 (Gauss)
VOUT S
ROUT
B
Min
Typ
Max
Unit
1.2
2
3.2
mA
1.45
1.7
1.85
V
30
Bandwidth=10Hz
to 10kHz
Output Noise
0.33
mV/Gauss
0.85 to 2.6
50
±3000
V
Ω
Gauss
90
70
μV
Transferring Characteristics (VCC=3.3V)
When there is no outside magnetic field (B=0Gauss),
the quiescent output voltage is one-half the supply
voltage in general.
For TO-92S-3 package, if a south magnetic pole
approaches the front face (the side with marking ID)
of the Hall effect sensor, the circuit will drive the
output voltage higher. In contrary, a north magnetic
pole will drive the output voltage lower. The
variations of voltage level up or down are
symmetrical. Because the SOT-23-3 is reversed
packaging with TO-92S-3, so the magnetic
performance is also reversed. Therefore, if the
reversed magnetic pole approaches the front face, the
output is the same as TO-92S-3 package. Greatest
magnetic sensitivity is obtained with a supply voltage
of 8V, 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 a next-level
amplifier for further amplifying if the changing
frequency of the magnetic field is high.
Figure 4. Transferring Characteristic of AH49H
North Pole
South Pole
For TO-92S-3
For SOT-23-3
Figure 5. Magnetic Characteristic of AH49H
Jun. 2013
Rev. 1.2
BCD Semiconductor Manufacturing Limited
Data Sheet
LINEAR HALL EFFECT IC
AH49H
Typical Performance Characteristics
5.0
2.8
4.5
2.4
4.0
3.5
2.0
VOUT (V)
ICC (V)
3.0
2.5
2.0
1.5
1.6
1.2
1.0
VCC=3.3V
B=0Gauss
No Load
0.5
No Load
0.8
0.0
2
3
4
5
6
7
-4000
8
-2000
0
2000
4000
B (Gauss)
VCC (V)
Figure 6. Supply Current vs. Supply Voltage
Figure 7. Output Voltage vs. Magnetic Field
3
5
4
2
VOUT (V)
VOUT (V)
3
2
1
VCC=3.3V
B=0Gauss
No Load
1
B=0Gauss
No Load
0
0
2
3
4
5
6
7
VCC (V)
Figure 8. Output Voltage vs. Supply Voltage
Jun. 2013
Rev. 1.2
8
-40
0
40
80
120
o
TA ( C)
Figure 9. Output Voltage vs. Ambient Temperature
BCD Semiconductor Manufacturing Limited
Data Sheet
LINEAR HALL EFFECT IC
AH49H
Typical Performance Characteristics (Continued)
450
SOT-23-3
TO-92S-3
400
350
PD (mW)
300
250
200
150
100
50
0
0
25
50
75
100
125
150
O
TA ( C)
Figure 10. Power Dissipation vs. Ambient Temperature
Jun. 2013
Rev. 1.2
BCD Semiconductor Manufacturing Limited
Data Sheet
LINEAR HALL EFFECT IC
AH49H
Mechanical Dimensions
TO-92S-3
Unit: mm(inch)
°
°
Jun. 2013
Rev. 1.2
BCD Semiconductor Manufacturing Limited
Data Sheet
LINEAR HALL EFFECT IC
AH49H
Mechanical Dimensions (Continued)
Unit: mm(inch)
0.300(0.012)
0.600(0.024)
2.650(0.104)
3.000(0.118)
1.500(0.059)
1.700(0.067)
SOT-23-3
1.450(0.057)
MAX.
°
°
Jun. 2013
Rev. 1.2
BCD Semiconductor Manufacturing Limited
BCD Semiconductor Manufacturing Limited
http://www.bcdsemi.com
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