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General Description

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 (V

). The resistor string uses its

own analog supplies (V

and V

) that require

- V

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 V

- V

and V

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/°C end-to-end and 5ppm/°C ratio-

metric 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 14-

pin TSSOP package. Each device is guaranteed over

the extended temperature range of -40°C to +85°C.

Applications

LCD Screen Contrast Adjustment

Data-Acquisition Systems

Mechanical Potentiometer Replacement

Low-Drift Programmable Gain Amplifier

Audio Volume Control

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)

MAX5436–MAX5439

±15V, 128-Tap, Low-Drift Digital Potentiometers

________________________________________________________________ Maxim Integrated Products 1

MAX5436/

MAX5438

µMAX

TOP VIEW

MAX5437/

MAX5439

TSSOP

GND

DIN

SCLK

SHDN

DIN

SCLK

IN+

IN-

OUT

GND

Pin Configurations

Ordering Information

19-2657; Rev 0; 10/02

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.

PART TEMP RANGE

PIN-

PACKAGE

RESISTANCE

(kΩ)

MAX5436EUB -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

SPI/QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

1 2 3 4 5 6 ... 10 11

MAX5436–MAX5439 1

Inhaltsverzeichnis

Seite 1 - MAX5436–MAX5439

General DescriptionThe MAX5436–MAX5439 are 128-tap high-voltage (±5Vto ±15V) digital potentiometers in packages that are halfthe size of comparable de

Seite 2

MAX5436–MAX5439±15V, 128-Tap, Low-Drift Digital Potentiometers10 _____________________________________________________________________________________

Seite 3

MAX5436–MAX5439±15V, 128-Tap, Low-Drift Digital PotentiometersMaxim cannot assume responsibility for use of any circuitry other than circuitry entirel

Seite 4

MAX5436–MAX5439±15V, 128-Tap, Low-Drift Digital Potentiometers2 ______________________________________________________________________________________

Seite 5

MAX5436–MAX5439±15V, 128-Tap, Low-Drift Digital Potentiometers_______________________________________________________________________________________

Seite 6

MAX5436–MAX5439±15V, 128-Tap, Low-Drift Digital Potentiometers4 ______________________________________________________________________________________

Seite 7

MAX5436–MAX5439±15V, 128-Tap, Low-Drift Digital Potentiometers_______________________________________________________________________________________

Seite 8

MAX5436–MAX5439±15V, 128-Tap, Low-Drift Digital Potentiometers6 ______________________________________________________________________________________

Seite 9

Detailed DescriptionDigital Interface OperationThe MAX5436–MAX5439 use a 3-wire SPI/QSPI/MICROWIRE-compatible serial data interface to controlthe wipe

Seite 10

MAX5436–MAX5439±15V, 128-Tap, Low-Drift Digital Potentiometers8 ______________________________________________________________________________________

Seite 11

MAX5436–MAX5439±15V, 128-Tap, Low-Drift Digital Potentiometers_______________________________________________________________________________________

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