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AD5415
(Rev.:Rev0)

Dual 12-Bit, High Bandwidth, Multiplying DAC with 4-Quadrant Resistors and Serial Interface

Analog Devices 

Dual 12-Bit, High Bandwidth, Multiplying DAC

with 4-Quadrant Resistors and Serial Interface

AD5415

FEATURES

On-chip 4-quadrant resistors allow flexible output ranges

10 MHz multiplying bandwidth

50 MHz serial interface

2.5 V to 5.5 V supply operation

±10 V reference input

Extended temperature range: −40°C to +125°C

24-lead TSSOP package

Guaranteed monotonic

Power-on reset

Daisy-chain mode

Readback function

0.5 µA 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 AD54151 is a CMOS 12-bit, dual-channel, current output

digital-to-analog converter. This device operates from a 2.5 V to

5.5 V power supply, making it suited to battery-powered appli-

cations as well as many other applications.

The applied external reference input voltage (VREF) determines

the full-scale output current. An integrated feedback resistor

(RFB) provides temperature tracking and full-scale voltage

output when combined with an external current-to-voltage

precision amplifier. In addition, this device contains all the

4-quadrant resistors necessary for bipolar operation and other

configuration modes.

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

is compatible with SPI®, QSPI™, MICROWIRE™, and most DSP

interface standards. In addition, a serial data out pin (SDO)

allows for daisy-chaining when multiple packages are used.

Data readback allows the user to read the contents of the DAC

register via the SDO pin. On power-up, the internal shift

register and latches are filled with zeros, and the DAC outputs

are at zero scale. As a result of manufacture on a CMOS submi-

cron process, this part offers excellent 4-quadrant multiplication

characteristics, with large-signal multiplying bandwidths of

10 MHz.

1US Patent Number 5,689,257.

VDD

SYNC

SCLK

SDIN

SDO

LDAC

FUNCTIONAL BLOCK DIAGRAM

AD5415

R3A R2_3A R2A

R3

R2

2R

2R

VREFA R1A

R1 RFB

2R 2R

SHIFT

REGISTER

INPUT

REGISTER

DAC

REGISTER

12-BIT

R-2R DAC A

RFBA

IOUT1A

IOUT2A

CLR

GND

POWER-ON

RESET

INPUT

REGISTER

DAC

REGISTER

12-BIT

R-2R DAC B

R3

R2

2R

2R

R3B R2_3B R2B

Figure 1.

R1 RFB

2R

2R

VREFB R1B

IOUT1B

IOUT2B

RFBB

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.

Specifications subject to change without notice. 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.

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