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AH49E Datasheet(PDF) 5 Page - BCD Semiconductor Manufacturing Limited

Part # AH49E
Description  LINEAR HALL-EFFECT IC
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Manufacturer  BCDSEMI [BCD Semiconductor Manufacturing Limited]
Direct Link  http://www.bcdsemi.com
Logo BCDSEMI - BCD Semiconductor Manufacturing Limited

AH49E Datasheet(HTML) 5 Page - BCD Semiconductor Manufacturing Limited

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5
Jun. 2008 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
LINEAR HALL-EFFECT IC
AH49E
Preliminary Datasheet
(VCC=5V, TA=25
oC, unless otherwise specified.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Supply Current
ICC
3.5
4.5
mA
Quiescent Output Voltage
VNULL
@ B=0GS
2.25
2.5
2.75
V
Output Voltage Sensitivity
B=0GS to
±1000GS
1.1
1.6
2.1
mV/GS
Output Voltage Span
VOS
1.0 to
(VCC-1.0)
0.8 to
(VCC-0.8)
V
Output Resistor
RO
60
120
Magnetic Field Range
B
±650
±1000
GS
Linearity of Span
0.7
%
Output Noise
BW=10Hz to 10kHz
90
µV
Electrical Characteristics
Transfer Characteristics (VCC=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.
1000
-1000
500
-500
0
1.0 V
2.5 V
4.0 V
Typical
Output
Voltage
V
B (Gauss)
Figure 4. The Transfer Characteristics of AH49E


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