1

®

DAC811

DAC811

Microprocessor-Compatible

12-BIT DIGITAL-TO-ANALOG CONVERTER

®

© 1983 Burr-Brown Corporation

PDS-503L

Printed in U.S.A. April, 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

For most current data sheet and other product

information, visit www.burr-brown.com

BPO

V

OUT

D/A Latch

Input Latch

4 MSBs

Input Latch

Input Latch

4 LSBs

12-Bit D/A Converter

Voltage Reference

10V

R

F

S

J

R

F

R

BPO

DESCRIPTION

The DAC811 is a complete, single-chip integrated-

circuit, microprocessor-compatible, 12-bit digital-to-

analog converter. The chip combines a precision volt-

age reference, microcomputer interface logic, and

double-buffered latch, in a 12-bit D/A converter with

a voltage output amplifier. Fast current switches and a

laser-trimmed thin-film resistor network provide a

highly accurate and fast D/A converter.

Microcomputer interfacing is facilitated by a double-

buffered latch. The input latch is divided into three

4-bit nibbles to permit interfacing to 4-, 8-, 12-, or

16-bit buses and to handle right-or left-justified data.

The 12-bit data in the input latches is transferred to the

D/A latch to hold the output value.

Input gating logic is designed so that loading the last

nibble or byte of data can be accomplished simulta-

neously with the transfer of data (previously stored in

adjacent latches) from adjacent input latches to the

D/A latch. This feature avoids spurious analog output

values while using an interface technique that saves

computer instructions.

The DAC811 is laser trimmed at the wafer level and

is specified to

±1/4LSB maximum linearity error (B

and K grades) at 25

°C and ±1/2LSB maximum over

the temperature range. All grades are guaranteed mono-

tonic over the specification temperature range.

The DAC811 is available in six performance grades

and three package types. DAC811J and K are speci-

fied over the temperature ranges of 0

°C to +70°C;

DAC811A and B are specified over –25

°C to +85°C;

DAC811J and K are packaged in a reliable 28-pin

plastic DIP or plastic SO package, while DAC811A

and B are available in a 28-pin 0.6" wide dual-inline

hermetically sealed ceramic side-brazed package (H

package).

FEATURES

q SINGLE INTEGRATED CIRCUIT CHIP

q MICROCOMPUTER INTERFACE:

Double-Buffered Latch

q VOLTAGE OUTPUT:

q MONOTONICITY GUARANTEED OVER

TEMPERATURE

q

TEMPERATURE

q GUARANTEED SPECIFICATIONS AT

AND

q TTL/5V CMOS-COMPATIBLE LOGIC

INPUTS

SBAS144