General Description

The MAX5494–MAX5499 10-bit (1024-tap), dual, non-

volatile, linear-taper, programmable voltage-dividers

and variable resistors perform the function of a

mechanical potentiometer, but replace the mechanics

with a 3-wire SPI™-compatible serial interface. The

MAX5494/MAX5495 are dual, 3-terminal, programma-

ble voltage-dividers; the MAX5496/MAX5497 are dual,

2-terminal variable resistors; and the MAX5498/

MAX5499 include one 2-terminal variable resistor and

one 3-terminal programmable voltage-divider.

The MAX5494–MAX5499 feature an internal, nonvolatile,

electrically erasable programmable read-only memory

(EEPROM) that stores the wiper position for initialization

during power-up. The 3-wire SPI-compatible serial inter-

face allows communication at data rates up to 7MHz.

The MAX5494–MAX5499 are ideal for applications requir-

ing digitally controlled potentiometers. End-to-end resis-

tance values of 10k

Ω and 50kΩ are available with a

35ppm/°C end-to-end temperature coefficient. The ratio-

metric temperature coefficient is 5ppm/°C for each chan-

nel, making these devices ideal for applications requiring

low-temperature-coefficient programmable voltage-

dividers such as low-drift, programmable-gain amplifiers.

The MAX5494–MAX5499 operate with either a single

power supply (+2.7V to +5.25V) or dual power supplies

(±2.5V). The devices consume 400µA (max) of supply

current when writing data to the nonvolatile memory

and 1.5µA (max) of standby supply current. The

devices are available in space-saving (5mm x 5mm x

0.8mm), 16-pin TQFN package and are specified over

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

Applications

Gain and Offset Adjustment

LCD Contrast Adjustment

Pressure Sensors

Low-Drift Programmable-Gain Amplifiers

Mechanical Potentiometer Replacement

Volume Control

Features

♦ Wiper Position Stored in Nonvolatile Memory and

Recalled Upon Power-Up

♦ 16-Pin, 5mm x 5mm x 0.8mm TQFN Package

♦ 35ppm/°C End-to-End Resistance Temperature

Coefficient

♦ 5ppm/°C Ratiometric Temperature Coefficient

♦ 10kΩ and 50kΩ End-to-End Resistor Values

♦ 3-Wire SPI-Compatible Serial Interface

50,000 Wiper Store Cycles

50 Years Wiper Data Retention

♦ 1.5µA (max) Standby Current

♦ Single +2.7V to +5.25V Supply Operation

♦ Dual ±2.5V Supply Operation

10-Bit, Dual, Nonvolatile, Linear-Taper

Digital Potentiometers

________________________________________________________________ Maxim Integrated Products

1

16

12

34

12

11

10

9

15

14

13

5

6

7

8

SCLK

N.C.

N.C.

DIN

N.C.

N.C.

TOP VIEW

MAX5494

MAX5495

5mm

× 5mm × 0.8mm TQFN

16

12

34

12

11

10

9

15

14

13

5

6

7

8

SCLK

N.C.

N.C.

DIN

N.C.

N.C.

MAX5496

MAX5497

5mm

× 5mm × 0.8mm TQFN

PART

TEMP RANGE

PIN-

PACKAGE

PKG CODE

MAX5494ETE

-40°C to +85°C

16 TQFN-EP*

T1655-2

MAX5495ETE

-40°C to +85°C

16 TQFN-EP*

T1655-2

Pin Configurations

Ordering Information

19-3562; Rev 1; 6/05

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.

*EP = Exposed pad.

Ordering Information continued at end of data sheet.

Selector Guide appears at end of data sheet.

Pin Configurations continued at end of data sheet.

SPI is a trademark of Motorola, Inc.