Datasheet

Variable-Gain Current-to-Voltage Converter
Figure 8 shows a variable-gain current-to-voltage con-
verter using a potentiometer as a variable resistor.
LCD Bias Control
Figure 9 shows a positive LCD bias control circuit using a
potentiometer as a voltage-divider.
Programmable Filter
Figure 10 shows a programmable filter using a dual
potentiometer.
Offset Voltage Adjustment Circuit
Figure 11 shows an offset voltage adjustment circuit using
a dual potentiometer.
Chip Information
PROCESS: BiCMOS
Figure 8. Variable Gain I-to-V Converter
Figure 10. Programmable Filter
Figure 9. Positive LCD Bias Control Using a Voltage-Divider
Figure 11. Offset Voltage Adjustment Circuit
L_
R1
R2
R3
V
OUT
I
S
H_
W_
V
OUT
= -I
S
x ((R3 x (1 + R2/R1)) + R2)
V
OUT
V
IN
LA
HA
WB
LB
HB
R2
R1
R3
WA
L_
V
OUT
H_
W_
+1.8V
V
OUT
LB
HB
WB
WA
LA
HA
V
IN
+1.8V
MAX5391/MAX5393 Dual 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
www.maximintegrated.com
Maxim Integrated │ 12