General Description

The DS1881 is a dual, nonvolatile (NV) digital poten-

tiometer designed to operate in audio systems that

require 5V signal levels. The potentiometer settings can

be stored in EEPROM so that they are retained when the

power is cycled. The DS1881 has separate supplies for

detector allows the wiper position to change when there

is no voltage across the potentiometer. The device is

also designed to minimize crosstalk, and the two digital

potentiometers provide 0.5dB channel-to-channel match-

ing to prevent volume differences between channels.

Total harmonic distortion (THD) is also minimal as long

as the wiper drives a high-impedance load.

Two attenuation configuration options provide optimum

flexibility for the specific application. Configuration

Option 1 provides 63 logarithmic tapered steps (0dB to

-62dB, 1dB/step) plus a mute setting. Configuration

Option 2 has 32 logarithmic steps plus mute and pro-

vides software compatibility with the DS1808. When

Configuration Option 2 is used in combination with the

16-pin SO package, the DS1881 is both software and pin

compatible with the DS1808 in 5V applications.

Applications

Notebook and PC Audio

Portable Audio Equipment

Car Stereo

Consumer Audio/Video

Features

♦ Dual, Audio Log Taper Potentiometers

♦ Low THD+N and Crosstalk

♦ 5V Analog Supply (Independent of Digital Supply)

♦ 3V to 5V Digital Supply Range

♦ Potentiometer Settings Configurable as NV

or Volatile

♦ Zero-Crossing Detector Eliminates Switching

Noise

♦ Two User-Configurable Attenuation Options

♦ Configuration Option 1: 63 Positions Provide 1dB

Attenuation Steps from 0dB to -62dB Plus Mute

♦ Configuration Option 2: (Software-Compatible

with the DS1808): 33 Positions Plus Mute as

Follows

Positions 0–12: 1dB per Step for 12 Steps

Positions 13–24: 2dB per Step for 12 Steps

Positions 25–32: 3dB per Step for 8 Steps

♦ Three Address Pins Allow Up to 8 Devices on

♦ 45kΩ Potentiometer End-to-End Resistance

♦ Industrial Temperature Range (-40°C to +85°C)

♦ 16-Pin TSSOP or SO Package

Dual NV Audio Taper Digital Potentiometer

______________________________________________ Maxim Integrated Products

1

16

15

14

13

12

11

10

1

2

3

4

5

6

7

SCL

SDA

N.C.

A1

A2

GND

TOP VIEW

CE

W1

H1

L0

W0

9

8L1

H0

A0

TSSOP/SO

DS1881

+

Pin Configuration

Rev 0; 1/06

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.

+Denotes lead-free package.

Ordering Information

PART

TEMP

RANGE

VERSION

(k

Ω)

PIN-

PACKAGE

DS1881E-045+

-40°C to +85°C

45

16 TSSOP

(173 mils)

DS1881E-045+T&R -40°C to +85°C

45

16 TSSOP

(173 mils)

Tape-and-Reel

DS1881Z-045+

-40°C to +85°C

45

16 SO

(150 mils)

DS1881Z-045+T&R -40°C to +85°C

45

16 SO

(150 mils)

Tape-and-Reel

Standard Specification as defined by Philips.

Typical Operating Circuit appears at end of data sheet.