MAX5439 Maxim Integrated Products, MAX5439 Datasheet - Page 9

• Manufacturer Part Number: MAX5439
• Description: +-15V 128-Tap Low-Drift Digital Potentiometers
• Manufacturer: Maxim Integrated Products

Figure 4. Noninverting Amplifier
Figure 5a. Simplified LCD Contrast Control Circuit
Figure 5b. Simplified LCD Contrast Control Circuit with Buffer
±15V, 128-Tap, Low-Drift Digital Potentiometers
V
S
R1
MAX427
+15V
-15V
_______________________________________________________________________________________
L
MAX629
MAX629
R2
DC/DC CONVERTER
DC/DC CONVERTER
W
(SIMPLIFIED)
(SIMPLIFIED)
CONTROL
CONTROL
V
V
V
O
MAX5436–
MAX5439
BATT
BATT
/V
S
= 1 + R
2
/R
1
H
V
O
MAX5439
MAX5436–
MAX5437/
MAX5439
(LCD BIAS)
(LCD BIAS)
V
V
OUT
OUT
±16V TO ±26V CONTRAST ADJUST
MICROCONTROLLER/MICROPROCESSOR
FIXED ±28V IN
±16V TO ±26V CONTRAST ADJUST
FIXED ±28V IN
MICROCONTROLLER/MICROPROCESSOR
PANEL
LCD
PANEL
LCD
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