16-Bit, Dual Voltage Output

DIGITAL-TO-ANALOG CONVERTER

DESCRIPTION

The DAC7642 and DAC7643 are dual channel, 16-bit, volt-

age output Digital-to-Analog Converters (DACs) which pro-

vide 15-bit monotonic performance over the specified tem-

perature range. They accept 16-bit parallel input data, have

double-buffered DAC input logic (allowing simultaneous up-

date of all DACs), and provide a readback mode of the

internal input registers. Programmable asynchronous reset

can operate from a single +5V supply or from +5V and –5V

supplies, providing an output range of 0 to +2.5V or –2.5V to

+2.5V, respectively.

Low power and small size per DAC make the DAC7642 and

DAC7643 ideal for automatic test equipment, DAC-per-pin

programmers, data acquisition systems, and closed-loop

servo-control. The DAC7642 and DAC7643 are available in

a LQFP-32 package and specified over a –40

°C to +85°C

temperature range.

FEATURES

q LOW POWER: 4mW

q UNIPOLAR OR BIPOLAR OPERATION

q SETTLING TIME: 10

q 15-BIT LINEARITY AND MONOTONICITY:

–40

q RESET TO MID-SCALE (DAC7642) OR

ZERO-SCALE (DAC7643)

q DATA READBACK

q DOUBLE-BUFFERED DATA INPUTS

APPLICATIONS

q PROCESS CONTROL

q CLOSED-LOOP SERVO-CONTROL

q MOTOR CONTROL

q DATA ACQUISITION SYSTEMS

q DAC-PER-PIN PROGRAMMERS

DAC7642

DAC7643

SBAS233 – DECEMBER 2001

www.ti.com

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.

Copyright © 2001, 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.

DAC A

DAC

Register A

Input

Register A

I/O

Buffer

Control

Logic

DAC B

DAC

Register B

Input

Register B

Sense

Sense

RST

LOADDACS

DACSEL

CS

R/W

DATA I/O

16

GND

DAC7642

DAC7643

DAC7642

DAC7643