Preliminary Datasheet
LINEAR HALL-EFFECT IC
General Description
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 pro-
portion to the strength of the magnetic field.
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 tem-
perature range of these linear Hall sensors is -40
o
C
to
85
o
C
, appropriate for commercial, consumer and
industrial applications.
The AH49E is available in standard TO-92S package.
AH49E
Features
·
·
·
·
·
·
·
·
Miniature Construction
Power Consumption of 3.5mA 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 of -40
o
C
to 85
o
C
Responds to Either Positive or Negative Gauss
Applications
·
·
·
·
·
·
·
·
Current Sensing
Motor Control
Position Sensing
Magnetic Code Reading
Ferrous Metal Detector
Vibration Sensing
Liquid Level Sensing
Weight Sensing
TO-92S
Figure 1. Package Type of AH49E
Jun. 2008 Rev. 1. 1
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
LINEAR HALL-EFFECT IC
Pin Configuration
Z3 Package
(TO-92S )
AH49E
3
2
1
OUT
GND
VCC
Figure 2. Pin Configuration of AH49E (Bottom View)
Pin Description
Pin Number
1
2
3
Pin Name
VCC
GND
OUT
Supply voltage
Ground pin
Output
Function
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
LINEAR HALL-EFFECT IC
Functional Block Diagram
AH49E
1
VCC
HALL
Sensor
Amplifier
65µA
Typ.
3
OUT
2
GND
Figure 3. Functional Block Diagram of AH49E
Ordering Information
AH49E
Circuit Type
Package
Z3: TO-92S
-
E1: Lead Free
G1: Green
Blank: Bulk
Package
TO-92S
Temperature
Range
-40 to 85
o
C
Part Number
Lead Free
AH49EZ3-E1
Green
AH49EZ3-G1
AH49E
Marking ID
Lead Free
Green
AH49G
Packing
Type
Bulk
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.
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
LINEAR HALL-EFFECT IC
Absolute Maximum Ratings (Note 1)
Parameter
Supply Voltage
Output Current
Operating Temperature
Storage Temperature Range
ESD (Human Body Model)
Symbol
V
CC
I
O
T
A
T
STG
Value
8
10
-40 to 100
-50 to 150
3000
Unit
V
mA
o
AH49E
C
o
C
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 indi-
cated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended
periods may affect device reliability.
Recommended Operating Conditions
Parameter
Supply Voltage
Operating Temperature
Symbol
V
CC
T
OP
Min
3.0
-40
Max
6.5
85
Unit
V
o
C
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BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
LINEAR HALL-EFFECT IC
Electrical Characteristics
(V
CC
=5V, T
A
=25
o
C, unless otherwise specified.)
Parameter
Supply Current
Quiescent Output Voltage
Output Voltage Sensitivity
Output Voltage Span
V
OS
Symbol
I
CC
V
NULL
@ B=0GS
B=0GS to
±1000GS
2.25
1.1
1.0 to
(V
CC
-1.0)
Conditions
Min
Typ
3.5
2.5
1.6
0.8 to
(V
CC
-0.8)
60
±650
±1000
0.7
BW=10Hz to 10kHz
90
120
Max
4.5
2.75
2.1
Unit
mA
V
mV/GS
V
AH49E
Output Resistor
Magnetic Field Range
Linearity of Span
Output Noise
R
O
B
Ω
GS
%
µ
V
Transfer Characteristics (V
CC
=5V)
When there is no ouside magnetic field (B=0GS), the
quiescent output voltage is one-half the supply voltage
in general. If a south magnetic pole approches to the
front face (the side with marking ID) of the Halleffect
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.
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
boosting further if the changing frequency of the
magnetic field is high.
V
Typical
Output
Voltage
4.0 V
2.5 V
1.0 V
-1000
-500
0
500
1000
B (Gauss)
Figure 4. The Transfer Characteristics of AH49E
Jun. 2008 Rev. 1. 1
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BCD Semiconductor Manufacturing Limited
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