DAC904

DAC904

14-Bit, 165MSPS

DIGITAL-TO-ANALOG CONVERTER

FEATURES

q SINGLE +5V OR +3V OPERATION

q HIGH SFDR: 20MHz Output at 100MSPS: 64dBc

q LOW GLITCH: 3pV-s

q LOW POWER: 170mW at +5V

q INTERNAL REFERENCE:

Optional Ext. Reference

Adjustable Full-Scale Range

Multiplying Option

APPLICATIONS

q COMMUNICATION TRANSMIT CHANNELS

WLL, Cellular Base Station

Digital Microwave Links

Cable Modems

q WAVEFORM GENERATION

Direct Digital Synthesis (DDS)

Arbitrary Waveform Generation (ARB)

q MEDICAL/ULTRASOUND

q HIGH-SPEED INSTRUMENTATION AND

CONTROL

q VIDEO, DIGITAL TV

DESCRIPTION

The DAC904 is a high-speed, Digital-to-Analog Converter (DAC)

offering a 14-bit resolution option within the family of high-

performance converters. Featuring pin compatibility among fam-

ily members, the DAC908, DAC900, and DAC902 provide a

component selection option to an 8-, 10-, and 12-bit resolution,

respectively. All models within this family of DACs support

update rates in excess of 165MSPS with excellent dynamic

performance, and are especially suited to fulfill the demands of

a variety of applications.

The advanced segmentation architecture of the DAC904 is

optimized to provide a high Spurious-Free Dynamic Range

(SFDR) for single-tone, as well as for multi-tone signals—

essential when used for the transmit signal path of communica-

tion systems.

The DAC904 has a high impedance (200k

Ω) current output with

a nominal range of 20mA and an output compliance of up to

1.25V. The differential outputs allow for both a differential or

single-ended analog signal interface. The close matching of the

current outputs ensures superior dynamic performance in the

differential configuration, which can be implemented with a

transformer.

Utilizing a small geometry CMOS process, the monolithic DAC904

can be operated on a wide, single-supply range of +2.7V to

+5.5V. Its low power consumption allows for use in portable and

battery-operated systems. Further optimization can be realized

by lowering the output current with the adjustable full-scale

option.

For noncontinuous operation of the DAC904, a power-down

mode results in only 45mW of standby power.

The DAC904 comes with an integrated 1.24V bandgap refer-

ence and edge-triggered input latches, offering a complete

converter solution. Both +3V and +5V CMOS logic families can

be interfaced to the DAC904.

The reference structure of the DAC904 allows for additional

flexibility by utilizing the on-chip reference, or applying an

external reference. The full-scale output current can be adjusted

over a span of 2-20mA, with one external resistor, while main-

taining the specified dynamic performance.

The DAC904 is available in SO-28 and TSSOP-28 packages.

Current

Sources

LSB

Switches

Segmented

Switches

+1.24V Ref.

Latches

14-Bit Data Input

D13...D0

DAC904

FSA

BW

AGND

CLK

DGND

INT/EXT

BYP

PD

DAC904

SBAS095C – MAY 2002

www.ti.com

Copyright © 2002, Texas Instruments Incorporated

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.