19-2657; Rev 3; 9/04
±15V, 128-Tap, Low-Drift Digital Potentiometers
The MAX5436–MAX5439 are 128-tap high-voltage (±5V
to ±15V) digital potentiometers in packages that are half
the size of comparable devices in 8-pin SO. They perform
the same function as mechanical potentiometers, but
replace the mechanics with a simple digital interface. The
digital logic is powered by a separate single +2.7V to
+5.25V supply voltage (VCC). The resistor string uses its
own analog supplies (V DD and V SS ) that require
VDD - VSS to be greater than 9V and less than 31.5V. This
allows for greater flexibility in voltage ranges that can be
used with these devices. Examples of analog supply
ranges include not only dual voltages of ±5V to ±15V, but
single-supply voltages, such as +10V, +15V, +30V, -30V,
and more, as long as the ranges of VDD - VSS and VCC VSS are met.
The MAX5437/MAX5439 include an on-chip, highvoltage, uncommitted amplifier, providing additional
reductions in board space and cost. Other features
include low 35ppm/°C end-to-end and 5ppm/°C ratiometric resistor temperature coefficients, a 3-wire SPI™/
QSPI™/MICROWIRE™-compatible serial interface, and
a power-on reset to midscale.
The MAX5436/MAX5438 are available in 10-pin µMAX
packages. The MAX5437/MAX5439 are available in 14pin TSSOP package. Each device is guaranteed over
the extended temperature range of -40°C to +85°C.
Features
♦ +10V to +30V Single-Supply Operation
♦ -28V to -10V Single Negative Supply Operation
♦ ±5V to ±15V Dual-Supply Operation
♦ 128 Tap Positions
♦ Uncommitted High-Voltage Amplifier
(MAX5437/MAX5439)
♦ Low Temperature Coefficient
35ppm/°C (End-to-End)
5ppm/°C (Ratiometric)
♦ Small-Footprint Packages
10-Pin µMAX (MAX5436/MAX5438)
14-Pin TSSOP (MAX5437/MAX5439)
♦ Glitchless Switching Between the Resistor Taps
♦ 3-Wire SPI/QSPI/MICROWIRE-Compatible Serial
Interface
♦ 50kΩ/100kΩ End-to-End Resistances
♦ Power-On Reset: Wiper Goes to Midscale
(Position 64)
Ordering Information
PART
TEMP RANGE
PINPACKAGE
RESISTANCE
(kΩ)
MAX5436EUB
Applications
LCD Screen Contrast Adjustment
-40°C to +85°C 10 µMAX
50
MAX5437EUD
-40°C to +85°C 14 TSSOP
50
MAX5438EUB
-40°C to +85°C 10 µMAX
100
MAX5439EUD
-40°C to +85°C 14 TSSOP
100
Data-Acquisition Systems
Mechanical Potentiometer Replacement
Pin Configurations
Low-Drift Programmable Gain Amplifier
Audio Volume Control
TOP VIEW
SCLK 1
10 VCC
9 L
MAX5436
MAX5438
GND 4
VSS 5
DIN 2
13 L
8 W
CS 3
12 W
7 H
DIN 2
CS 3
14 VCC
SCLK 1
SHDN 4
6 VDD
GND 5
MAX5437
MAX5439
11 H
10 VDD
SPI/QSPI are trademarks of Motorola, Inc.
VSS 6
9 IN+
OUT 7
μMAX
8 IN-
TSSOP
MICROWIRE is a trademark of National Semiconductor Corp.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
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MAX5436–MAX5439
General Description
