DAC
DAC
764
2
764
3
DAC7642
DAC7643
SBAS233 – DECEMBER 2001
16-Bit, Dual Voltage Output
DIGITAL-TO-ANALOG CONVERTER
FEATURES
q
LOW POWER: 4mW
q
UNIPOLAR OR BIPOLAR OPERATION
q
SETTLING TIME: 10
µ
s to 0.003% FSR
q
15-BIT LINEARITY AND MONOTONICITY:
–40
°
C to +85
°
C
q
RESET TO MID-SCALE (DAC7642) OR
ZERO-SCALE (DAC7643)
q
DATA READBACK
q
DOUBLE-BUFFERED DATA INPUTS
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.
APPLICATIONS
q
q
q
q
q
PROCESS CONTROL
CLOSED-LOOP SERVO-CONTROL
MOTOR CONTROL
DATA ACQUISITION SYSTEMS
DAC-PER-PIN PROGRAMMERS
V
CC
V
SS
V
REF
L
Sense
V
REF
L
V
REF
H
V
REF
H
Sense
DAC7642
DAC7643
16
DATA I/O
I/O
Buffer
Input
Register A
DAC
Register A
DAC A
V
OUT
A
V
OUT
A Sense
Input
Register B
DACSEL
CS
R/W
DAC
Register B
DAC B
V
OUT
B
V
OUT
B Sense
Control
Logic
GND
RST
LOADDACS
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.
Copyright © 2001, Texas Instruments Incorporated
www.ti.com
BURR-BROWN [ BURR-BROWN CORPORATION ]
