REV. 0

Information furnished by Analog Devices is believed to be accurate and

reliable. However, no responsibility is assumed by Analog Devices for its

use, nor for any infringements of patents or other rights of third parties that

may result from its use. No license is granted by implication or otherwise

under any patent or patent rights of Analog Devices. Trademarks and

registered trademarks are the property of their respective owners.

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

Tel: 781/329-4700

www.analog.com

Fax: 781/326-8703

© 2004 Analog Devices, Inc. All rights reserved.

8-Bit, High Bandwidth

Multiplying DAC with Serial Interface

FEATURES

2.5 V to 5.5 V Supply Operation

50 MHz Serial Interface

8-Bit (Byte Load) Serial Interface, 6 MHz Update Rate

10 MHz Multiplying Bandwidth

10 V Reference Input

Low Glitch Energy < 2 nV-s

Extended Temperature Range –40 C to +125 C

10-Lead MSOP Package

Guaranteed Monotonic

4-Quadrant Multiplication

Power On Reset with Brownout Detection

LDAC Function

0.4

A Typical Power Consumption

APPLICATIONS

Portable Battery-Powered Applications

Waveform Generators

Analog Processing

Instrumentation Applications

Programmable Amplifiers and Attenuators

Digitally-Controlled Calibration

Programmable Filters and Oscillators

Composite Video

Ultrasound

Gain, Offset, and Voltage Trimming

FUNCTIONAL BLOCK DIAGRAM

GENERAL DESCRIPTION

The AD5425 is a CMOS 8-bit current output digital-to-analog

converter that operates from a 2.5 V to 5.5 V power supply,

making it suited to battery-powered applications and many

other applications.

This DAC utilizes a double buffered 3-wire serial interface that

is compatible with SPI

DSP interface standards. In addition, an

LDAC pin is provided,

which allows simultaneous update in a multi-DAC configuration.

On power-up, the internal shift register and latches are filled

with 0s and the DAC outputs are at 0 V.

As a result of processing on a CMOS submicron process, this

DAC offers excellent 4-quadrant multiplication characteristics,

with large signal multiplying bandwidths of 10 MHz.

provides temperature tracking and full-scale voltage output

when combined with an external I-to-V precision amplifier.

The AD5425 DAC is available in a small 10-lead MSOP package.

SCLK

SYNC

AD5425

R

8-BIT

R-2R DAC

DAC REGISTER

SDIN

GND

POWER-ON

RESET

LDAC

CONTROL LOGIC AND

INPUT SHIFT REGISTER

INPUT LATCH

*Protected by U.S. Patent No. 5,969,657; other patents pending.