MAX5389 MAXIM [Maxim Integrated Products], MAX5389 Datasheet - Page 11

• Manufacturer Part Number: MAX5389
• Description: Dual, 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometer
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 7 shows a variable gain current to voltage con-
verter using a potentiometer as a variable resistor.
Figure 8 shows a positive LCD bias control circuit using
a potentiometer as a voltage-divider.
Figure 9 shows a positive LCD bias control circuit using
a potentiometer as a variable resistor
Figure 7. Variable Gain I-to-V Converter
Figure 8. Positive LCD Bias Control Using a Voltage-Divide
Variable Gain Current to Voltage Converter
I S
+5V
______________________________________________________________________________________
H
L
R3
W
Dual, 256-Tap, Volatile, Low-Voltage
V
OUT
W
Linear Taper Digital Potentiometer
=
I S
x
LCD Bias Control
((R3 x (1 + R2/R1)) + R2)
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 9. Positive LCD Bias Control Using a Variable Resistor
Figure 10. Programmable Filter
V
IN
HB
Offset Voltage Adjustment Circuit
+5V
H
L
R3
WB
WA
W
LB
HA
LA
Programmable Filter
R2
R1
V
OUT
V
OUT
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