Document
DAC7742
DAC7742
SBAS256A – DECEMBER 2002 – AUGUST 2007
16-Bit, Single Channel DIGITAL-TO-ANALOG CONVERTER With Internal Reference and Parallel Interface
FEATURES
q LOW POWER: 150mW Maximum q +10V INTERNAL REFERENCE q UNIPOLAR OR BIPOLAR OPERATION q SETTLING TIME: 5µs to ±0.003% FSR q 16-BIT MONOTINICITY, –40°C TO +85°C q ±10V, ±5V OR +10V CONFIGURABLE VOLTAGE
OUTPUT q RESET TO MIN-SCALE OR MID-SCALE q DOUBLE-BUFFERED DATA INPUT q INPUT REGISTER DATA READBACK q SMALL LQFP-48 PACKAGE q SUPPORTS TRANSPARENT DATA INPUT
OPERATION
APPLICATIONS
q PROCESS CONTROL q ATE PIN ELECTRONICS q CLOSED-LOOP SERVO CONTROL q MOTOR CONTROL q DATA ACQUISITION SYSTEMS
DESCRIPTION
The DAC7742 is a 16-bit Digital-to-Analog Converter (DAC) that provides 16 bits of monotonic performance over the specified operating temperature range and offers a +10V, low-drift internal reference. Designed for automatic test equipment and industrial process control applications, the DAC7742 output swing can be configured in a ±10V, ±5V, or +10V range. The flexibility of the output configuration allows the DAC7742 to provide both unipolar and bipolar operation by pin strapping. The DAC7742 includes a high-speed output amplifier with a maximum settling time of 5µs to ±0.003% FSR for a 20V full-scale change and only consumes 100mW (typical) of power.
The DAC7742 features a standard 16-bit parallel interface with double buffering to allow asynchronous updates of the analog output, and data read-back to support data integrity verification prior to an update. A user-programmable reset control allows the DAC output to reset to min-scale (FFFFH) or mid-scale (7FFFH) overriding the DAC register values. The DAC7742 is available in an LQFP-48 package and three performance grades specified to operate from –40°C to +85°C.
VDD VSS VCC
REFADJ REFOUT REFIN
VREF
REFEN CS
R/W
RST RSTSEL
+10V Reference
Control Logic
Buffer
ROFFSET RFB2
RFB1
Data I/O 16
I/O Buffer
Input Register
DAC Register
DAC
SJ VOUT
AGND DGND
LDAC
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.
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Copyright © 2002-2007, Texas Instruments Incorporated
ABSOLUTE MAXIMUM RATINGS(1)
VCC to VSS ........................................................................... –0.3V to +32V VCC to AGND ...................................................................... –0.3V to +16V VSS to AGND ...................................................................... –16V to +0.3V AGND to DGND ................................................................. –0.3V to +0.3V REFIN to AGND ............................................................. 0V to VCC – 1.4V VDD to DGND ........................................................................ –0.3V to +6V Digital Input Voltage to DGND ................................. –0.3V to VDD + 0.3V Digital Output Voltage to DGND .............................. –0.3V to VDD + 0.3V Operating Temperature Range ........................................ –40°C to +85°C Storage Temperature Range ......................................... –65°C to +150°C Junction Temperature .................................................................... +150°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
LINEARITY DIFFERENTIAL
ERROR NONLINEARITY
(LSB)
(LSB)
PACKAGE-LEAD
PACKAGE DESIGNATOR(1)
SPECIFIED TEMPERATURE
RANGE
ORDERING NUMBER
PACKAGE MARKING
TRANSPORT MEDIA, QUANTITY
DAC7742
±6
±4
LQFP-48
PT
–40°C to +85°C DAC7742Y/250 DAC7742Y
Tape and Reel, 250
"
"
"
"
"
"
DAC7742Y/2K
"
Tape and Reel, 2000
DAC7742
±4
±2
LQFP-48
PT
–40°C to +85°C DAC7742YB/250 DAC7742YB
Tape and Reel, 250
"
"
"
"
"
"
DAC7742YB/2K
"
Tape and Reel, 2000
DAC7742
±3
±1
LQFP-48
PT
–40°C to +85°C DAC7742YC/250 DAC7742YC
Tape and Reel, 250
"
"
"
"
"
"
DAC7742YC/2K
"
Tape a.