BD6088GUL
Technical Note
(2) I/V conversion
? The bias voltage and external resistance for the I-V conversion (Rs)
are adjusted with adaptation of sensor characteristic
? The bias voltage is selectable by register setup.
Register : VSB
“0” : SBIAS output voltage 3.0V
“1” : SBIAS output voltage 2.6V
Ambient
SSENS voltage
SBIAS
SBIAS
VCC
VSSENS
Sensor IC
Iout
A/D
Rs is large
IOUT
SSENS
GND
Rs
SGND
BD6088GUL
Rs is small
Rs : Sense resistance (A sensor output current is changed into the voltage value.)
SBIAS : Bias power supply terminal for the sensor (3.0V / 2.6V by register setting)
SSENS : Sense voltage input terminal
SSENS Voltage = Iout x Rs
Ambient
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? 2011 ROHM Co., Ltd. All rights reserved.
34/51
2011.04 - Rev.A
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