HomedatasheetDAC7742Y/2K

DAC7742Y/2K Datasheet

16-Bit, Single Channel, Parallel Interface With Internal Reference
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Description

Features, Applications

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: to �0.003% FSR q 16-BIT MONOTINICITY, 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

DESCRIPTION

The 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 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 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 an LQFP-48 package and three performance grades specified to operate from to +85�C.

APPLICATIONS

q PROCESS CONTROL q ATE PIN ELECTRONICS q CLOSED-LOOP SERVO CONTROL q MOTOR CONTROL q DATA ACQUISITION SYSTEMS

SJ Data I/O 16 I/O Buffer Input Register DAC Register DAC VOUT

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.

VCC to VSS........................................................................... to +32V VCC to AGND...................................................................... to +16V VSS to AGND...................................................................... to +0.3V AGND to DGND................................................................. to +0.3V REFIN to AGND..................................................................... to +11V VDD to DGND................................................................. 0V to VCC � 1.4V 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........................................ to +85�C Storage Temperature Range......................................... 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.

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.

LINEARITY ERROR (LSB) �6 DIFFERENTIAL NONLINEARITY (LSB) �4 PACKAGE DESIGNATOR(1) PT SPECIFIED TEMPERATURE RANGE to +85�C ORDERING NUMBER DAC7742YC/250 DAC7742YC/2K PACKAGE MARKING DAC7742Y TRANSPORT MEDIA, QUANTITY Tape and Reel, 250 Tape and Reel, 2000 Tape and Reel, 250 Tape and Reel, 2000 Tape and Reel, 250 Tape and Reel, 2000

NOTE: (1) For the most current specifications and package information refer to our web site at www.ti.com.

All specifications TA = TMIN to TMAX, VCC = +15V, VSS = �15V, VDD = +5V, Internal reference enabled, unless otherwise noted. DAC7742Y PARAMETER ACCURACY Linearity Error (INL) = 25�C Differential Linearity Error (DNL) Monotonicity Offset Error Offset Error Drift Gain Error Gain Error Drift PSRR (VCC or VSS) ANALOG OUTPUT(1) Voltage 14 �2 With Internal REF With External REF With Internal REF At Full-Scale CONDITIONS MIN TYP MAX MIN DAC7742YB TYP MAX MIN DAC7742YC TYP MAX �2 �1 UNITS

Output Current Output Impedance Maximum Load Capacitance Short-Circuit Current Short-Circuit Duration

REFERENCE Reference Output REFOUT Impedance REFOUT Voltage Drift REFOUT Voltage Adjustment(3) REFIN Input Range(4) REFIN Input Current REFADJ Input Range Absolute Max Value that can be applied is VCC REFADJ Input Impedance VREF Output Current VREF Impedance

All specifications TA = TMIN to TMAX, VCC = +15V, VSS = �15V, VDD = +5V, Internal reference enabled, unless otherwise noted. DAC7742Y PARAMETER DYNAMIC PERFORMANCE Settling Time to �0.003% CONDITIONS 20V Output Step = 200pF, with external REFOUT to REFIN at 10kHz |IH| < 10�A |IL| 10�A 0.7 VDD 0.3 VDD See Table III IOH = �0.8mA IOL = 1.6mA MIN TYP 3 MAX 4 MIN DAC7742YB TYP MAX MIN DAC7742YC TYP MAX UNITS �s

Digital Feedthrough Output Noise Voltage DIGITAL INPUT VIH VIL Input Coding DIGITAL OUTPUT VOH VOL POWER SUPPLY VDD VCC VSS IDD ICC ISS Power TEMPERATURE RANGE Specified Performance Specifications same as DAC7742Y.

Bipolar Operation Unipolar Operation Unloaded No Load, Ext. Reference No Load, Int. Reference

NOTES: (1) With minimum VCC/VSS requirements, internal reference enabled. (2) Please refer to the "Theory of Operation" section for more information with respect to output voltage configurations. (3) See Figure 7 for gain and offset adjustment connection diagrams when using the internal reference. (4) The minimum value for REFIN must be equal to the greater of VSS +14V and +4.75V, where +4.75V is the minimum voltage allowed. (5) Reference low-pass filter values: 100k, 1.0�F (See Figure 10).


Features

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