MAX5481 MAXIM [Maxim Integrated Products], MAX5481 Datasheet - Page 18

• Manufacturer Part Number: MAX5481
• Description: 10-Bit, Nonvolatile, Linear-Taper Digital Potentiometers
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 12 shows the configuration for a 1st-order pro-
grammable filter using two variable resistors. Adjust R2
for the gain and adjust R3 for the cutoff frequency. Use
the following equations to estimate the gain (G) and the
3dB cutoff frequency (f
10-Bit, Nonvolatile, Linear-Taper Digital
Potentiometers
Figure 9. Positive LCD Bias Control Using a Voltage-Divider
Figure 10. Positive LCD Bias Control Using a Variable Resistor
18
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MAX5481
MAX5482
MAX5483
MAX5484
H
L
L
5V
C
):
W
W
5V
Programmable Filter
MAX480
MAX480
30V
30V
V
OUT
V
OUT
Figure 11. Programmable Gain/Offset Adjustment
Figure 12. Programmable Filter
MAX5481
MAX5482
MAX5483
MAX5484
MAX5483
MAX5484
MAX5483
MAX5484
V
V
IN
IN
G
f
C
H
L
V
= +
L
L
=
REF
C
1
2
L
π



×
R
W
R
W
R3
R2
W
W
R
2
1
1
3



×
C
R1
V
V
OUT
OUT