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
5
BCD Semiconductor Manufacturing Limited
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
