MAX5437EUD+ Maxim Integrated Products, MAX5437EUD+ Datasheet - Page 9

• Manufacturer Part Number: MAX5437EUD+
• Description: IC DGTL POT 128-TAP 15V 14-TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX5437EUD+

• Taps: 128
• Resistance (ohms): 50K
• Number Of Circuits: 1
• Temperature Coefficient: 35 ppm/°C Typical
• Memory Type: Volatile
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 10 V ~ 30 V, ±5 V ~ 15 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 14-TSSOP
• Resistance In Ohms: 50K
• Number Of Pots: Single
• Taps Per Pot: 128
• Resistance: 900 Ohms
• Wiper Memory: Volatile
• Digital Interface: Serial (3-Wire, SPI)
• Operating Supply Voltage: 2.7 V to 5.25 V
• Supply Current: 60 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Description/function: High Voltage ñ15V, 128-Tap, Low-Drift Digital Potentiometers w/Uncommitted Op-Amp
• Mounting Style: SMD/SMT
• Supply Voltage (max): 5.25 V
• Supply Voltage (min): 2.7 V
• Tolerance: 25 %
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
MICROCONTROLLER/MICROPROCESSOR
FIXED 28V IN
16V TO 26V CONTRAST ADJUST
MICROCONTROLLER/MICROPROCESSOR
FIXED 28V IN
16V TO 26V CONTRAST ADJUST
PANEL
LCD
PANEL
LCD
9