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FAN8408DTF View Datasheet(PDF) - Fairchild Semiconductor

Part Name
Description
View to exact match
FAN8408DTF
Fairchild
Fairchild Semiconductor Fairchild
FAN8408DTF Datasheet PDF : 12 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
3. Hall Amplifier Input Block
V
CC
R1
IN+
C1
5
FAN8408D C2
R2
6
IN-
Hall
Sensor
R3
FAN8408D
The hall current (IH) is determined by R1, R2 and R3.
IH
=
------------V----C-----C---------------
R1 + R2 + R3
Where, the R2 is the impedance of hall sensor.
An external capacitor, C1, can be used to reduce a power supply noise. In addition, C2 is to remove a noise which is caused in
case the line is long from the hall sensor output to the hall input (pin 5 / 6) of the device.
The input bias voltage of hall amplifier is between 1V and VCC-2V as following figure.
VCC
VCC-2V
VCC / 2
1V
GND
It is recommended that R1 and R3 should have the same value to make the output signal of hall sensor centered as VCC/2.
7
 

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