1

®

DAC1221

DAC1221

®

16-Bit Low Power

DIGITAL-TO-ANALOG CONVERTER

FEATURES

q 16-BIT MONOTONICITY GUARANTEED

OVER –40

q LOW POWER: 1.2mW

q VOLTAGE OUTPUT

q SETTLING TIME: 2ms to 0.012%

q MAX LINEARITY ERROR: 30ppm

q ON-CHIP CALIBRATION

APPLICATIONS

q PROCESS CONTROL

q ATE PIN ELECTRONICS

q CLOSED-LOOP SERVO-CONTROL

q SMART TRANSMITTERS

q PORTABLE INSTRUMENTS

q VCO CONTROL

DESCRIPTION

The DAC1221 is a Digital-to-Analog (D/A) converter

offering 16-bit monotonic performance over the speci-

fied temperature range. It utilizes delta-sigma technol-

ogy to achieve inherently linear performance in a

small package at very low power. The output range is

two times the external reference voltage. On-chip

calibration circuitry dramatically reduces offset and

gain errors.

The DAC1221 features a synchronous serial interface.

In single converter applications, the serial interface can

be accomplished with just two wires, allowing low-

cost isolation. For multiple converters, a CS signal

allows for selection of the appropriate D/A converter.

The DAC1221 has been designed for closed-loop

control applications in the industrial process control

market, and high resolution applications in the test and

measurement market. It is also ideal for remote appli-

cations, battery-powered instruments, and isolated sys-

tems. The DAC1221 is available in a SSOP-16 package.

© 1999 Burr-Brown Corporation

PDS-1519B

Printed in U.S.A. May, 2000

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111

Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

DAC1221

For most current data sheet and other product

information, visit www.burr-brown.com

Clock Generator

Serial

Interface

Second-Order

∆∑

Modulator

Instruction Register

Command Register

Data Register

Offset Register

Full-Scale Register

Microcontroller

First-Order

Switched

Capacitor Filter

Second-Order

Continuous

Time Post Filter

Modulator Control

C

C

1

X

IN

X

OUT

V

REF

CS

DV

DD

DGND

AV

DD

AGND

SDIO

V

OUT

SCLK

SBAS113