General Description

The MAX5408–MAX5411 dual, logarithmic taper digital

potentiometers, with 32-tap points each, replace

mechanical potentiometers in audio applications requir-

ing digitally controlled resistors. The MAX5408/

MAX5410 are dual potentiometers with one wiper per

potentiometer. The MAX5409/MAX5411 are dual poten-

tiometers with two wipers per potentiometer (see

Functional Diagram). An SPI™-compatible serial inter-

face controls the wiper positions. The MAX5408–

MAX5411 have a factory-set resistance of 10k

Ω per

potentiometer. A zero-crossing detect feature mini-

mizes the audible noise generated by wiper transitions.

The MAX5408–MAX5411 have nominal temperature

coefficients of 35ppm/°C end-to-end and 5ppm/°C

ratiometric. The MAX5408–MAX5411 are available in

16-pin QSOP and 16-pin thin QFN packages and are

specified over the extended temperature range (-40°C

to +85°C).

Applications

Stereo Volume Control

Fading and Balancing Stereo Signals

Mechanical Potentiometer Replacement

Features

o Log Taper with 2dB Steps Between Taps

o 32-Tap Positions for Each Wiper

o Small 16-Pin QSOP/QFN Packages

o Single-Supply Voltage Operation

+2.7V to +3.6V (MAX5408/MAX5409)

+4.5V to +5.5V (MAX5410/MAX5411)

o Low 0.5µA Standby Supply Current

o Zero-Crossing Detection for Clickless Switching

o Mute Function to -90dB

o 10kΩ Fixed Resistance Value

o 3-Wire SPI-Compatible Serial Data Interface

o Power-On Reset: Wiper Goes to Maximum

Attenuation

o Digital Output for Readback and Daisy-Chaining

Capabilities

Dual, Audio, Log Taper Digital Potentiometers

________________________________________________________________ Maxim Integrated Products

1

Pin Configurations

Ordering Information

19-2049; Rev 2; 9/02

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

WIPERS PER

RESISTOR

MAX5408EEE -40

°C to +85°C 16 QSOP

1

MAX5408ETE

-40

°C to +85°C 16 Thin QFN

1

MAX5409EEE -40

°C to +85°C 16 QSOP

2

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

DOUT

GND

AGND

H1

L1

W1A

N.C. (W1B)

TOP VIEW

MAX5408-

MAX5411

QSOP

DIN

SCLK

L0

CS

H0

W0A

N.C. (W0B)

16

15

14

13

DIN

DOUT

5

6

78

W0A

N.C. (W0B) N.C. (W1B)

W1A

9

10

11

12

L1

( ) ARE FOR MAX5409/MAX5411 ONLY

H1

AGND

GND

4

3

2

1

L0

H0

CS

SCLK

MAX5408-

MAX5411

THIN QFN

(4mm x 4mm)

(5mm x 6mm)

Ordering Information continued at end of data sheet.

Functional Diagram appears at end of data sheet.

SPI is a trademark of Motorola, Inc.