MAX5386 MAXIM [Maxim Integrated Products], MAX5386 Datasheet - Page 11

• Manufacturer Part Number: MAX5386
• Description: Dual, 256-Tap, Volatile Low-Voltage Linear Taper Digital Potentiometers
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 8 shows a variable gain current-to-voltage con-
verter using a potentiometer as a variable resistor.
Figure 9 shows a positive LCD bias control circuit using
a potentiometer as a voltage-divider.
Figure 9. Positive LCD Bias Control Using a Voltage-Divider
Figure 8. Variable Gain I-to-V Converter
Variable Gain Current to Voltage Converter
I S
+5V
______________________________________________________________________________________
H
L
W
R3
Linear Taper Digital Potentiometers
Dual, 256-Tap, Volatile Low-Voltage
V
OUT
+30V
W
= I
S
x ((R3 x (1 + R2/R1)) + R2)
LCD Bias Control
H
L
R1
V OUT
R2
V OUT
Figure 10 shows a programmable filter using a dual
potentiometer.
Figure 11 shows an offset voltage adjustment circuit
using a dual potentiometer.
Figure 11. Offset Voltage Adjustment Circuit
Figure 10. Programmable Filter
V IN
Offset Voltage Adjustment Circuit
HB
WB
R3
LB
HB
WB
WA
+5V
LB
HA
HA
LA
Programmable Filter
R2
R1
WA
V OUT
LA
V OUT
11