1

LTC7543/LTC8143

Improved Industry Standard

Serial 12-Bit Multiplying DACs

s

Improved Direct Replacement for AD7543

and DAC-8143

s

Low Cost

s

DNL and INL Over Temperature:

±0.5LSB

s

Easy, Fast and Flexible Serial Interface

s

Daisy-Chain 3-Wire Interface for Multiple DAC

Systems (LTC8143)

s

1LSB Maximum Gain Error Over Temperature

Eliminates Adjustment

s

Asynchronous Clear Input for Initialization

s

Four-Quadrant Multiplication

s

Low Power Consumption

s

16-Pin PDIP and SO Packages

The LTC

ing digital-to-analog converters (DACs). They are superior

pin compatible replacements for the AD7543 and

DAC-8143. Improvements include better accuracy, better

stability over temperature and supply variations, lower

sensitivity to output amplifier offset, tighter timing speci-

fications and lower output capacitance.

An easy-to-use serial interface includes an asynchronous

CLEAR input for systems requiring initialization to a known

state. The LTC8143 has a serial data output to allow daisy-

chaining multiple DACs on a 3-wire interface bus.

These DACs are extremely versatile. They can be used for

2-quadrant and 4-quadrant multiplying, programmable

gain and single supply applications, such as noninverting

voltage output and biased or offset ground mode.

Parts are available in 16-pin PDIP and SO packages and

are specified over the extended industrial temperature

range, – 40

°C to 85°C.

FEATURES

s

Process Control and Industrial Automation

s

Remote Microprocessor-Controlled Systems

s

Digitally Controlled Filters and Power Supplies

s

Programmable Gain Amplifiers

s

Automatic Test Equipment

, LTC and LT are registered trademarks of Linear Technology Corporation.

Multiplying DAC Has Easy 3-Wire Serial Interface

LTC7543

LTC8143

AGND

DGND

3

12

4

7

5

2

14

5V

CLOCK

DATA

LOAD

STB1

SRI

LD1

15

16

1

OUT 1

33pF

7543/8143 TA01

OUT 2

LT

Integral Nonlinearity Over Temperature

DIGITAL INPUT CODE

0

4095

7543/8143 TA02

1024

2048

3072

1.0

0.5

0

–0.5

–1.0

512

1536

2560

3584