REV. A

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a

AD5541/AD5542

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

Tel: 781/329-4700

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Fax: 781/326-8703

© Analog Devices, Inc., 1999

5 V, Serial-Input

Voltage-Output, 16-Bit DACs

FUNCTIONAL BLOCK DIAGRAMS

SERIAL INPUT REGISTER

REF

CS

DIN

SCLK

AGND

DGND

AD5541

16-BIT DAC

16-BIT DATA LATCH

CONTROL

LOGIC

SERIAL INPUT REGISTER

REFF

CS

DIN

SCLK

AGNDF

DGND

AD5542

16-BIT DAC

16-BIT DATA LATCH

CONTROL

LOGIC

REFS

LDAC

AGNDS

RFB

INV

FEATURES

Full 16-Bit Performance

5 V Single Supply Operation

Low Power

Short Settling Time

Unbuffered Voltage Output Capable of Driving 60 k

Loads Directly

SPI™/QSPI™/MICROWIRE™-Compatible Interface

Standards

Power-On Reset Clears DAC Output to 0 V (Unipolar

Mode)

Schmitt Trigger Inputs for Direct Optocoupler Interface

APPLICATIONS

Digital Gain and Offset Adjustment

Automatic Test Equipment

Data Acquisition Systems

Industrial Process Control

GENERAL DESCRIPTION

The AD5541 and AD5542 are single, 16-bit, serial input,

voltage output DACs that operate from a single 5 V

± 10%

supply.

The AD5541 and AD5542 utilize a versatile 3-wire interface that

is compatible with SPI, QSPI, MICROWIRE, and DSP inter-

face standards.

These DACs provide 16-bit performance without any adjust-

ments. The DAC output is unbuffered, which reduces power

consumption and offset errors contributed to by an output buffer.

The AD5542 can be operated in bipolar mode generating a

± V

connections for the reference and analog ground pins to reduce

layout sensitivity.

The AD5541 and AD5542 are available in an SO package.

PRODUCT HIGHLIGHTS

1. Single Supply Operation.

The AD5541 and AD5542 are fully specified and guaranteed

for a single 5 V

± 10% supply.

2. Low Power Consumption.

These parts consume typically 1.5 mW with a 5 V supply.

3. 3-Wire Serial Interface.

4. Unbuffered output capable of driving 60 k

Ω loads.

This reduces power consumption as there is no internal buffer

to drive.

5. Power-On Reset circuitry.

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corporation.