Datasheet

MAX5160/MAX5161
Alternative Positive
LCD Bias Control
Alternatively, use an op amp to provide buffering and
gain to the output of the MAX5160/MAX5161. Connect
the MAX5160 to the positive input of a noninverting op
amp (Figure 3) to select a portion of the input signal by
digitally controlling the wiper terminal. Figure 4 shows a
similar circuit for the MAX5161.
Adjustable Gain
Figure 5 shows how to use the MAX5161 to digitally
adjust the gain of a noninverting op amp configuration.
Connect the MAX5161 in series with a resistor to ground
to form the adjustable gain control of a noninverting
amplifier. The MAX5160/MAX5161 have a low 5ppm/°C
ratiometric tempco that allows for a very stable adjust-
able gain configuration over temperature.
Serial Interface
Figure 6 is the serial-interface timing diagram.
Low-Power Digital Potentiometers
6 _______________________________________________________________________________________
GAIN 6
30V
W
L
H
INC
CS
GND
+5V
+5V
V
OUT
V
DD
U/D
MAX5160
Figure 3. MAX5160 Positive LCD Bias Control
GAIN 6
30V
L
H
GND
+5V+5V
V
OUT
V
DD
INC
U/D
MAX5161
Figure 4. MAX5161 Positive LCD Bias Control
V
CC
L
H
GND
V
IN
+5V
a)
b)
V
OUT
V
DD
INC
U/D
V
CC
L
H
W
V
IN
V
OUT
MAX5161
MAX5160
Figure 5. Adjustable Gain Circuit: a) MAX5161; b) MAX5160