Datasheet

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
clears all registers to a mid-scale code of 8000
H
(DAC7642)
or to a zero-scale code of 0000
H
(DAC7643). These DACs
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
● LOW POWER: 4mW
● UNIPOLAR OR BIPOLAR OPERATION
● SETTLING TIME: 10µs to 0.003% FSR
● 15-BIT LINEARITY AND MONOTONICITY:
–40°C to +85°C
● RESET TO MID-SCALE (DAC7642) OR
ZERO-SCALE (DAC7643)
● DATA READBACK
● DOUBLE-BUFFERED DATA INPUTS
APPLICATIONS
● PROCESS CONTROL
● CLOSED-LOOP SERVO-CONTROL
● MOTOR CONTROL
● DATA ACQUISITION SYSTEMS
● 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
V
REF
L V
REF
H
V
REF
H
Sense
V
REF
L
Sense
V
OUT
B
V
OUT
A
V
OUT
B Sense
RST LOADDACS
DACSEL
CS
R/W
DATA I/O
16
GND
V
OUT
A Sense
V
SS
V
CC
DAC7642
DAC7643
DAC7642
DAC7643