1

LTC1655

16-Bit Rail-to-Rail

Micropower DAC in

SO-8 Package

s

16-Bit Monotonicity Over Temperature

s

Deglitched Rail-to-Rail Voltage Output

s

SO-8 Package

s

5V Single Supply Operation

s

s

Internal Reference

s

Maximum DNL Error: 1LSB

s

Power-On Reset

s

3-Wire Cascadable Serial Interface

s

Low Cost

The LTC

tal-to-analog converter (DAC) in an SO-8 package. It

includes an output buffer and a reference. The 3-wire serial

interface is compatible with SPI/QSPI and MICROWIRE

TM

protocols. The CLK input has a Schmitt trigger that allows

direct optocoupler interface.

The LTC1655 has an onboard 2.048V reference that can be

overdriven to a higher voltage. The output swings from 0V

to 4.096V when using the internal reference. The typical

power dissipation is 3.0mW on a single 5V supply.

The LTC1655 is pin compatible with Linear Technology’s

It is the only buffered 16-bit DAC in an SO-8 package and

it includes an onboard reference for stand alone

performance.

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Digital Calibration

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Industrial Process Control

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Automatic Test Equipment

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Cellular Telephones

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

MICROWIRE is a trademark of National Semiconductor Corporation.

–

+

16-BIT

DAC

4.5V TO 5.5V

2.048V

GND

POWER-ON

RESET

TO

OTHER

DACS

16-BIT

SHIFT

REG

AND

DAC

LATCH

µP

16

REF

2

86

4

5

1655 TA01

CLK

1

CS/LD

3

7

RAIL-TO-RAIL

VOLTAGE

OUTPUT

(0V TO 4.096V)

REF

Functional Block Diagram: 16-Bit Rail-to-Rail DAC

Differential Nonlinearity

vs Input Code

CODE

0

– 1.0

– 0.2

– 0.4

– 0.6

– 0.8

0

0.2

0.4

0.6

0.8

1.0

16384

32768

1655 TA02

49152

65535

FEATURES

DESCRIPTIO

APPLICATIO S

TYPICAL APPLICATIO