MAX5393 MAXIM [Maxim Integrated Products], MAX5393 Datasheet - Page 12

• Manufacturer Part Number: MAX5393
• Description: Dual 256-Tap, Volatile, Low-Voltage Linear Taper Digital Potentiometers
• Manufacturer: MAXIM [Maxim Integrated Products]

Dual 256-Tap, Volatile, Low-Voltage
Linear Taper Digital Potentiometers
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 10 shows a programmable filter using a dual
potentiometer.
Figure 8. Variable Gain I-to-V Converter
Figure 10. Programmable Filter
12
Variable-Gain Current-to-Voltage Converter
_____________________________________________________________________________________
V
IN
HB
I
S
R3
WB
WA
R3
LB
HA
LA
V
W_
OUT
Programmable Filter
R2
= I
S
x ((R3 x (1 + R2/R1)) + R2)
H_
L_
LCD Bias Control
R1
R1
R2
V
OUT
V
OUT
Figure 9. Positive LCD Bias Control Using a Voltage-Divider
Figure 11. Offset Voltage Adjustment Circuit
Figure 11 shows an offset voltage adjustment circuit
using a dual potentiometer.
PROCESS: BiCMOS
Offset Voltage Adjustment Circuit
WB
+1.8V
V
IN
H_
L_
HB
LB
W_
Process Information
+1.8V
HA
WA
V
OUT
LA
V
OUT