PDF DAC7742 Data sheet ( Hoja de datos )

Número de pieza	DAC7742
Descripción	16-Bit/ Single Channel DIGITAL-TO-ANALOG CONVERTER With Internal Reference and Parallel Interface
Fabricantes	Burr-Brown Corporation
Logotipo
Hay una vista previa y un enlace de descarga de DAC7742 (archivo pdf) en la parte inferior de esta página. Total 19 Páginas
No Preview Available ! DAC7742 DAC7742 SBAS256 – DECEMBER 2002 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 equip- ment 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. www.ti.com Copyright © 2002, Texas Instruments Incorporated 1 page TIMING DIAGRAMS DATA WRITE CYCLE CS R/W Data In DB15-DB0 tWCS tWS tDS Data Valid LDAC VOUT tWH tDH tLWD tS tLS tDS Data Valid tLH tDH READ CYCLE CS tRDS R/W Data Out DB15-DB0 tRCS tRDH Data Valid tCSD tDZ TIMING CHARACTERISTICS PARAMETER READ tRCS tRDS tRDH tDZ tCSD WRITE tWS tWH tWCS tLWD tLS tLH tDS tDH RESET tRSS tSS tSH ANALOG tS DESCRIPTION CS LOW for Read R/W HIGH to CS LOW R/W HIGH After CS HIGH CS HIGH to Data Bus High Impedance CS LOW to Data Bus Valid R/W LOW to CS LOW R/W LOW After CS HIGH CS LOW for Write LDAC LOW for Write CS LOW to LDAC HIGH for Direct Update CS LOW After LDAC HIGH Data Valid to CS LOW Data Valid After CS HIGH RST LOW RSTSEL Valid Before RST LOW RSTSEL Valid After RST HIGH Voltage Output Settling Time RESET TIMING tSS RSTSEL RST tSH tRSS +FS (RSTSEL = LOW) VOUT –FS +FS VOUT (RSTSEL = HIGH) –FS tS Min-Scale Mid-Scale DAC7742Y MIN TYP MAX UNITS 90 ns 10 ns 10 ns 10 70 ns 70 100 ns 10 ns 10 ns 25 ns 20 ns 30 ns 0 ns 0 ns 20 ns 30 ns 0 ns 10 ns 5 µs DAC7742 SBAS256 www.ti.com 5 5 Page THEORY OF OPERATION The DAC7742 is a voltage output, 16-bit DAC with a +10V built- in internal reference. The architecture is an R-2R ladder con- figuration with the three MSBs segmented, followed by an operational amplifier that serves as a buffer, as shown in Figure 1. The output buffer is designed to allow user-configurable output adjustments giving the DAC7742 output voltage ranges of 0V to +10V, –5V to +5V, or –10V to +10V. Please refer to Figures 2, 3, and 4 for pin configuration information. The digital input is a parallel word made up of the 16-bit DAC code and is loaded into the DAC register using the LDAC input pin. The converter can be powered from ±12V to ±15V dual analog supplies and a +5V logic supply. The device offers a reset function, which immediately sets the DAC output voltage and DAC register to min-scale (code FFFFH) or mid-scale (code 7FFFH). The data I/O and reset functions are discussed in more detail in the following sections. REFADJ REFOUT REFIN VREF Buffer R/4 +10V Internal Reference R R/2 R/2 R/4 2R 2R 2R 2R 2R 2R 2R 2R 2R R/4 FIGURE 1. DAC7742 Architecture. VREF AGND ROFFSET RFB2 RFB1 SJ VOUT VDD 0.1µF 1µF Control Bus DGND VDD RST LDAC CS R/W RSTSEL REFEN REFOUT REFADJ REFIN NC VSS 0.1µF VCC 1µF 0.1µF 1µF Data Bus DAC7742 NC NC DB6 DB5 DB4 DB3 Data Bus DB2 DB1 DB0 NC NC NC (0V to +10V) FIGURE 2. Basic Operation: VOUT = 0V to +10V. DAC7742 SBAS256 www.ti.com 11 11 Page

Páginas	Total 19 Páginas
PDF Descargar	[ Datasheet DAC7742.PDF ]

Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
DAC7741	16-Bit/ Single Channel DIGITAL-TO-ANALOG CONVERTER With Internal Reference and Parallel Interface	Burr-Brown Corporation
DAC7741	16-Bit Voltage Output Digital-To-Analog Converter (Rev. B)	Texas Instruments
DAC7741Y	16-Bit/ Single Channel DIGITAL-TO-ANALOG CONVERTER With Internal Reference and Parallel Interface	Burr-Brown Corporation
DAC7741YB	16-Bit/ Single Channel DIGITAL-TO-ANALOG CONVERTER With Internal Reference and Parallel Interface	Burr-Brown Corporation

Número de pieza	Descripción	Fabricantes
SLA6805M	High Voltage 3 phase Motor Driver IC.	Sanken
SDC1742	12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters.	Analog Devices

DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares,
permitiéndote verlos en linea o descargarlos en PDF.

DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar