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AD5530/AD5531

Serial Input, Voltage Output

12-/14-Bit DACs

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corporation.

FEATURES

Pin-Compatible 12- and 14-Bit DACs

Serial Input, Voltage Output

Maximum Output Voltage Range of

10 V

Data Readback

3-Wire Serial Interface

Clear Function to a User-Defined Voltage

Power-Down Function

Serial Data Output for Daisy-Chaining

16-Lead TSSOP Packages

APPLICATIONS

Industrial Automation

Automatic Test Equipment

Process Control

General-Purpose Instrumentation

GENERAL DESCRIPTION

The AD5530 and AD5531 are single 12-/14-bit serial input,

voltage output DACs, respectively.

They utilize a versatile 3-wire interface that is compatible with

SPI

Data is presented to the part in the format of a 16-bit serial word.

Serial data is available on the SDO pin for daisy-chaining pur-

poses. Data readback allows the user to read the contents of the

DAC register via the SDO pin.

The DAC output is buffered by a gain of 2 amplifier and refer-

enced to the potential at DUTGND.

LDAC may be used to update

the output of the DAC asynchronously. A power-down (

PD) pin

allows the DAC to be put into a low power state, and a

CLR pin

allows the output to be cleared to a user-defined voltage, the

potential at DUTGND.

The AD5530 and AD5531 are available in 16-lead TSSOP

packages.

FUNCTIONAL BLOCK DIAGRAM

SYNC

SCLK

GND

R

R

DUTGND

PD

SDO

RBEN

LDAC

+

–

R

R

REFIN

REFAGND

DAC REGISTER

SDIN

SHIFT REGISTER

12-/14-BIT DAC

POWER-DOWN

CONTROL LOGIC

CLR

AD5530/AD5531