19-2657; Rev 0; 10/02
卤15V, 128-Tap, Low-Drift Digital Potentiometers
General Description
The MAX5436鈥揗AX5439 are 128-tap high-voltage (卤5V
to 卤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 (V
CC
). The resistor string uses its
own analog supplies (V
DD
and V
SS
) that require
V
DD
- V
SS
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 卤5V to 卤15V, but
single-supply voltages, such as +10V, +15V, +30V, -30V,
and more, as long as the ranges of V
DD
- V
SS
and V
CC
-
V
SS
are met.
The MAX5437/MAX5439 include an on-chip, high-
voltage, uncommitted amplifier, providing additional
reductions in board space and cost. Other features
include low 35ppm/掳C end-to-end and 5ppm/掳C ratio-
metric resistor temperature coefficients, a 3-wire SPI鈩?
QSPI鈩?MICROWIRE鈩?compatible serial interface, and
a power-on reset to midscale.
The MAX5436/MAX5438 are available in 10-pin 碌MAX
packages. The MAX5437/MAX5439 are available in 14-
pin TSSOP package. Each device is guaranteed over
the extended temperature range of -40掳C to +85掳C.
Features
o
+10V to +30V Single-Supply Operation
o
-28V to -10V Single Negative Supply Operation
o
卤5V to 卤15V Dual-Supply Operation
o
128 Tap Positions
o
Uncommitted High-Voltage Amplifier
(MAX5437/MAX5439)
o
Low Temperature Coefficient
35ppm/掳C (End-to-End)
5ppm/掳C (Ratiometric)
o
Small-Footprint Packages
10-Pin 碌MAX (MAX5436/MAX5438)
14-Pin TSSOP (MAX5437/MAX5439)
o
Glitchless Switching Between the Resistor Taps
o
3-Wire SPI/QSPI/MICROWIRE-Compatible Serial
Interface
o
50k鈩?100k鈩?End-to-End Resistances
o
Power-On Reset: Wiper Goes to Midscale
(Position 64)
MAX5436鈥揗AX5439
Ordering Information
PART
MAX5436EUB
TEMP RANGE
PIN-
PACKAGE
RESISTANCE
(k鈩?
50
50
100
100
-40掳C to +85掳C 10 碌MAX
-40掳C to +85掳C 14 TSSOP
-40掳C to +85掳C 10 碌MAX
-40掳C to +85掳C 14 TSSOP
Applications
LCD Screen Contrast Adjustment
Data-Acquisition Systems
Mechanical Potentiometer Replacement
Low-Drift Programmable Gain Amplifier
Audio Volume Control
MAX5437EUD
MAX5438EUB
MAX5439EUD
Pin Configurations
TOP VIEW
SCLK 1
DIN 2
CS 3
GND 4
V
SS
5
10 V
CC
9 L
SCLK 1
DIN 2
CS 3
SHDN 4
GND 5
V
SS
6
OUT 7
14 V
CC
13 L
12 W
MAX5436/
MAX5438
8 W
7 H
6 V
DD
MAX5437/
MAX5439
11 H
10 V
DD
9 IN+
8 IN-
碌MAX
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
TSSOP
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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