Preliminary Datasheet
LINEAR HALL EFFECT IC
AH49F
General Description
The AH49F 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.
The AH49F is available in standard TO-92S and
SOT-23-3 packages.
Features
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Miniature Construction
Power Consumption of 3.0mA at V
CC
=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: -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)
600V (Machine Model)
Application
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Current Sensing
Motor Control
Position Sensing
Magnetic Code Reading
Rotary Encoder
Ferrous Metal Detector
Vibration Sensing
Liquid Level Sensing
Weight Sensing
TO-92S
SOT-23-3
Figure 1. Package Types of AH49F
Jun. 2011
Rev. 1. 1
1
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
LINEAR HALL EFFECT IC
AH49F
Pin Configuration
Z3 Package
(TO-92S)
N Package
(SOT-23-3)
GND
3
3
2
1
OUT
GND
VCC
1
2
VCC
OUT
(Front View)
(Top View)
Figure 2. Pin Configuration of AH49F
Pin Description
Pin Number
Pin Name
TO-92S
1
2
3
SOT-23-3
1
3
2
VCC
GND
OUT
Power supply pin
Ground pin
Output pin
Function
Jun. 2011
Rev. 1. 1
2
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
LINEAR HALL EFFECT IC
AH49F
Functional Block Diagram
Figure 3. Functional Block Diagram of AH49F
Ordering Information
AH49F
-
Circuit Type
E1: Lead Free
G1: Green
Blank: Bulk
TR: Tape & Reel
Package
Z3: TO-92S
N: SOT-23-3
Temperature
Range
-40 to 105°C
SOT-23-3
AH49FNTR-G1
Part Number
Lead Free
AH49FZ3-E1
Package
TO-92S
Green
AH49FZ3-G1
Marking ID
Lead
Green
Free
49FE
49FG
GT6
Packing
Type
Bulk
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Jun. 2011
Rev. 1. 1
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
LINEAR HALL EFFECT IC
AH49F
Absolute Maximum Ratings (Note 1)
Parameter
Supply Voltage
Instantaneous Supply Voltage
TO-92S
Power Dissipation
SOT-23-3
Ambient Temperature
Storage Temperature
ESD (Human Body Model)
ESD (Machine Model)
T
A
T
STG
P
D
230
-40 to 125
-50 to 150
6000
600
°C
°C
V
V
Symbol
V
CC
V
CC_INST
Value
10
Unit
V
V
mW
50
400
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 (T
A
=25°C)
Parameter
Supply Voltage
Operating Temperature
Symbol
V
CC
T
OP
Min
3
-40
Max
8
105
Unit
V
°C
Jun. 2011
Rev. 1. 1
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
LINEAR HALL EFFECT IC
AH49F
Electrical Characteristics
V
CC
=5V, T
A
=25°C, unless otherwise specified.
Parameter
Supply Current
Quiescent
Output
Voltage
Output
Voltage
Sensitivity
Output Voltage Span
Output Resistor
Linear Magnetic Range
Linearity of Span
Output Noise
Symbol
I
CC
V
NULL
V
SEN
V
OUT_S
R
OUT
B
Conditions
B=0 (Gauss)
B=0 to
(Gauss)
±600
Min
2
2.25
1.7
1.0 to
(V
CC
-1.0)
±500
Typ
3
2.5
2.1
0.8 to
(Vcc-0.8)
60
±800
0.7
90
Max
4
2.75
2.5
Unit
mA
V
mV/Gauss
V
120
Ω
Gauss
%
μV
Bandwidth=10Hz
to 10kHz
Transferring Characteristics (V
CC
=5V)
When there is no outside magnetic field (B=0Gauss),
the quiescent output voltage is one-half the supply
voltage in general.
For TO-92S 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, 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 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
South Pole
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.
V
Typical
Output
Voltage
4.0V
2.5V
1.0V
-800
-400
0
400
800
B (Gauss)
Figure 4. Transferring Characteristic of AH49F
North Pole
For TO-92S
Figure 5. Magnetic Characteristic of AH49F
Jun. 2011
Rev. 1. 1
5
For SOT-23-3
BCD Semiconductor Manufacturing Limited
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