REV. A

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

a

+5 V, Serial Input

Complete 12-Bit DAC

DAC8512

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106,

U.S.A.

Tel: 617/329-4700

World Wide Web Site: http://www.analog.com

Fax: 617/326-8703

© Analog Devices, Inc., 1996

FUNCTIONAL BLOCK DIAGRAM

7

8

1

2

3

4

5

6

REF

12-BIT DAC

DAC REGISTER

GND

SERIAL REGISTER

12

12

CLR

LD

CS

CLK

SDI

FEATURES

Space Saving SO-8 or Mini-DIP Packages

Complete, Voltage Output with Internal Reference

1 mV/Bit with 4.095 V Full Scale

Single +5 Volt Operation

No External Components

3-Wire Serial Data Interface, 20 MHz Data Loading Rate

Low Power: 2.5 mW

APPLICATIONS

Portable Instrumentation

Digitally Controlled Calibration

Servo Controls

Process Control Equipment

PC Peripherals

GENERAL DESCRIPTION

The DAC8512 is a complete serial input, 12-bit, voltage output

digital-to-analog converter designed to operate from a single

+5 V supply. It contains the DAC, input shift register and

latches, reference and a rail-to-rail output amplifier. Built using

a CBCMOS process, these monolithic DACs offer the user low

cost, and ease of use in +5 V only systems.

Coding for the DAC8512 is natural binary with the MSB loaded

first. The output op amp can swing to either rail and is set to a

range of 0 V to +4.095 V—for a one-millivolt-per-bit resolution.

It is capable of sinking and sourcing 5 mA. An on-chip reference

is laser trimmed to provide an accurate full-scale output voltage

of 4.095 V.

Serial interface is high speed, three-wire, DSP compatible with

data in (SDI), clock (CLK) and load strobe (LD). There is also

a chip-select pin for connecting multiple DACs.

A CLR input sets the output to zero scale at power on or upon

user demand.

The DAC8512 is specified over the extended industrial (–40

°C

to +85

°C) temperature range. DAC8512s are available in plas-

tic DIPs and SO-8 surface mount packages.

1.0

–1.0

4096

–0.5

–0.75

0

0

–0.25

0.25

0.5

0.75

3072

2048

1024

DIGITAL INPUT CODE – Decimal

Linearity Error vs. Digital Input Code