MAX5160_99 데이터 시트보기 (PDF) - Maxim Integrated
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MAX5160_99 Datasheet PDF : 8 Pages
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Low-Power Digital Potentiometers
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.
+5V
+5V
H
INC
U/D
CS
GND
MAX5160
VDD
W
L
30V
VOUT
+5V
INC
U/D
VDD
GND
+5V
H MAX5161
L
30V
VOUT
GAIN 6
GAIN 6
Figure 3. MAX5160 Positive LCD Bias Control
VCC
VIN
VOUT
Figure 4. MAX5161 Positive LCD Bias Control
VCC
VIN
VOUT
+5V
H
INC
U/D
VDD
GND
L
MAX5161
W
L
H
MAX5160
a)
b)
Figure 5. Adjustable Gain Circuit: a) MAX5161; b) MAX5160
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