1

LTC1456

12-Bit Rail-to-Rail

Micropower DAC

with Clear Input

s

Digital Calibration

s

Industrial Process Control

s

Automatic Test Equipment

s

Cellular Telephones

CODE

0

0.5

0

–0.5

1024

2048 2560

1456 TA02

512

1536

3072 3584 4095

Differential Nonlinearity

vs Input Code

Functional Block Diagram: 12-Bit Rail-to-Rail DAC with Clear Input

–

+

12-BIT

DAC

4.5V TO 5.5V

2.048V

GND

POWER-ON

RESET

TO

OTHER

DACS

12-BIT

SHIFT

REG

AND

DAC

LATCH

µP

2

8

4

5

1456 TA01

CLK

1

CS/LD

3

CLR

6

7

RAIL-TO-RAIL

VOLTAGE

OUTPUT

FEATURES

s

SO-8 Package

s

12-Bit Resolution

s

Buffered True Rail-to-Rail Voltage Output

s

Asynchronous Clear Input

s

Built-In Reference

s

Schmitt Trigger On Clock Input Allows Direct

Optocoupler Interface

s

Power-On Reset Clears DAC to 0V

s

3-Wire Cascadable Serial Interface

s

Maximum DNL Error: 0.5LSB

s

Low Cost

The LTC

voltage output, 12-bit digital-to-analog converter (DAC) in

an SO-8 package. It includes a rail-to-rail output buffer

amplifier and an easy-to-use 3-wire cascadable serial

interface. The LTC1456 includes a CLR pin that asynchro-

nously clears the DAC to zero scale.

The LTC1456 has an internal 2.048V reference and a full-

scale output of 4.095V. It operates on a 4.5V to 5.5V

supply, dissipating 2.2mW.

The low power supply current and the space saving SO-8

package make the LTC1456 ideal for battery-powered

applications.

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