AD5450/AD5451/AD5452/AD5453*

a

REV. PrD Oct, 2003

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Analog Devices, Inc., 2003

8/10/12/14-BitHighBandwidth

Multiplying DACs with Serial Interface

Preliminary Technical Data

PRELIMINARY TECHNICAL DATA

*US Patent Number 5,689,257

SPI and QSPI are trademarks of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corporation.

FEATURES

+2.5 V to +5.5 V Supply Operation

50MHz Serial Interface

10MHz Multiplying Bandwidth

±10V Reference Input

8-Lead TSOT & MSOP Packages

Pin Compatible 8, 10, 12 and 14 Bit Current Output DACs

Extended Temperature range –40°C to +125°C

Guaranteed Monotonic

Four Quadrant Multiplication

Power On Reset with brown out detect

<5

µµµµµA typical Current 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 AD5450/AD5451/AD5452/AD5453 are CMOS 8,

10, 12 and 14-bit Current Output digital-to-analog

converters respectively.

These devices operate from a +2.5 V to 5.5 V power sup-

ply, making them suited to battery powered applications

and many other applications.

These DACs utilize double buffered 3-wire serial interface

that is compatible with SPI

and most DSP interface standards.

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

filled with zeros and the DAC output is at zero scale.

As a result of manufacture on a CMOS sub micron

process, they offer excellent four quadrant multiplication

characteristics, with large signal multiplying bandwidths

of 10MHz.

FUNCTIONAL BLOCK DIAGRAM

determines the full scale output current. An integrated

full scale voltage output when combined with an external

Current to Voltage precision amplifier.

The AD5450/AD5451/AD5452/AD5453 DACs are

available in small 8-lead TSOT & MSOP packages.

CONTROL LOGIC &

INPUT SHIFT REGISTER

SCLK

SYNC

AD5450/

AD5451/

AD5452/

AD5453

IOUT1

R

8/10/12/14

BIT

R-2R DAC

DAC REGISTER

SDIN

INPUT LATCH

Power On

Reset

GND