Document
DAC7642
DAC7642
DAC7643
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: 10µs 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
APPLICATIONS
q PROCESS CONTROL q CLOSED-LOOP SERVO-CONTROL q MOTOR CONTROL q DATA ACQUISITION SYSTEMS q DAC-PER-PIN PROGRAMMERS
DESCRIPTION
The DAC7642 and DAC7643 are dual channel, 16-bit, voltage output Digital-to-Analog Converters (DACs) which provide 15-bit monotonic performance over the specified temperature range. They accept 16-bit parallel input data, have double-buffered DAC input logic (allowing simultaneous update 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 8000H (DAC7642) or to a zero-scale code of 0000H (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.
DAC7642 DAC7643
DATA I/O
16
I/O
Buffer
VCC
VSS
Input Register A
DACSEL CS
R/W
Control Logic
Input Register B
DAC Register A
DAC Register B
VREFL Sense
VREFL
VREFH
VREFH Sense
DAC A DAC B
VOUTA VOUTA Sense VOUTB VOUTB Sense
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.
www.ti.com
Copyright © 2001, Texas Instruments Incorporated
ABSOLUTE MAXIMUM RATINGS(1)
VCC to VSS ............................................................................. –0.3V to 11V VCC to GND .......................................................................... –0.3V to 5.5V VREFL to VSS ............................................................. –0.3V to (VCC – VSS) VCC to VREFH ............................................................ –0.3V to (VCC – VSS) VREFH to VREFL ......................................................... –0.3V to (VCC – VSS) Digital Input Voltage to GND ................................... –0.3V to VCC + 0.3V Digital Output Voltage to GND ................................. –0.3V to VCC + 0.3V Maximum Junction Temperature ................................................... +150°C Operating Temperature Range ........................................ –40°C to +85°C Storage Temperature Range ......................................... –65°C to +125°C Lead Temperature (soldering, 10s) ............................................... +300°C
NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability.
ELECTROSTATIC DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
PACKAGE/ORDERING INFORMATION
PRODUCT
DAC7642VF
"
DAC7642VFB
"
DAC7643VF
"
DAC7643VFB
"
PACKAGE MONOTONICITY PACKAGE-LEAD DESIGNATOR(1)
14 Bits
LQFP-32
VF
"
"
"
15 Bits
LQFP-32
VF
"
"
"
14 Bits
LQFP-32
VF
"
"
"
15 Bits
LQFP-32
VF
"
"
"
SPECIFIED TEMPERATURE
RANGE
–40°C to +85°C
"
–40°C to +85°C
"
–40°C to +85°C
"
–40°C to +85°C
"
PACKAGE MARKING
DAC7642
"
DAC7642B
"
DAC7643
"
DAC7643B
"
ORDERING NUMBER
DAC7642VFT DAC7642VFR
DAC7642VFB T DAC7642VFB R
DAC7643VFT DAC7643VFR
DAC7643VFB T DAC7643VFB R
TRANSPORT MEDIA, QUANTITY
Tape and Reel, 250 Tape and Reel, 1000
Tape and Reel, 250 Tape and Reel, 1000
Tape and Reel, 250 Tape and Reel, 1000
Tape and Reel, 250 Tape and Reel, 1000
NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com.
2
DAC7642, DAC7643
www.ti.com
SBAS233
ELECTRICAL CHARACTERISTICS (Dual Supply)
At TA = TMIN to TMAX, VCC = +5V, VSS = –5V, .