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Status

Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 240kB) Download   E-Mail

Description

The DS1881 is a dual, nonvolatile (NV) digital potentiometer 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 the potentiometers (VCC) and the communication circuitry (VDD). For clickless/popless operation, a zero-crossing 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 matching 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 provides 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.

Key Features		Applications/Uses
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 I²C-Compatible Serial Interface Three Address Pins Allow Up to 8 Devices on I²C Bus 45kΩ Potentiometer End-to-End Resistance Industrial Temperature Range (-40°C to +85°C) 16-Pin TSSOP or SO Package		Car Stereo Consumer Audio/Video Notebook and PC Audio Portable Audio Equipment

Diagram

Typical Operating Circuit

Application Notes

Application Note 4051: Using an Analog Voltage to Control a Digital Potentiometer - DS1881

Design Guides

Audio (PDF) Digital Potentiometers (PDF)

Reliability Reports

Reliability Report: DS1881.pdf

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-4 of 4

DS1881	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1881Z-050+			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1881Z-050+T&R			Active	SOIC(N);16 pin;61.9 mm² Outline Drawing: 21-0041 (PDF) Land Pattern: 90-0097 (PDF) Use pkgcode/variation: S16+5*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1881E-050+T&R			Active	TSSOP;16 pin;33.4 mm² Outline Drawing: 21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1881E-050+			Active	TSSOP;16 pin;33.4 mm² Outline Drawing: 21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

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