8-Bit, High Bandwidth

Multiplying DAC with Serial Interface

Data Sheet

AD5425

Rev. C

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

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

Tel: 781.329.4700

www.analog.com

Fax: 781.461.3113

©2004–2012 Analog Devices, Inc. All rights reserved.

FEATURES

2.5 V to 5.5 V supply operation

50 MHz serial interface

2.47 MSPS update rate

INL of ±0.25 LSB

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 µA 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

GENERAL DESCRIPTION

The AD54251 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 suitable for battery-powered applications and many

other applications.

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

is compatible with SPI

interface standards. An LDAC pin is also provided, which

allows simultaneous updates in a multi-DAC configuration. On

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

0s and the DAC outputs are 0 V.

As a result of manufacturing on a CMOS submicron process,

this DAC offers excellent 4-quadrant multiplication charac-

teristics with large signal multiplying bandwidths of 10 MHz.

the full-scale output current. An integrated feedback resistor,

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

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

FUNCTIONAL BLOCK DIAGRAM

Figure 1.

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