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AD7398 Dataheets PDF



Part Number AD7398
Manufacturers Analog Devices
Logo Analog Devices
Description Quad/ Serial-Input 12-Bit/10-Bit DACs
Datasheet AD7398 DatasheetAD7398 Datasheet (PDF)

a FEATURES AD7398—12-Bit Resolution AD7399—10-Bit Resolution Programmable Power Shutdown Single (3 V to 5 V) or Dual (؎5 V) Supply Operation 3-Wire Serial SPI-Compatible Interface Internal Power ON Reset Double Buffered Registers for Simultaneous Multichannel DAC Update Four Separate Rail-to-Rail Reference Inputs Thin Profile TSSOP-16 Package Available Low Tempco 1.5 ppm/؇ C APPLICATIONS Automotive Output Voltage Span Portable Communications Digitally Controlled Calibration PC Peripherals GENERA.

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a FEATURES AD7398—12-Bit Resolution AD7399—10-Bit Resolution Programmable Power Shutdown Single (3 V to 5 V) or Dual (؎5 V) Supply Operation 3-Wire Serial SPI-Compatible Interface Internal Power ON Reset Double Buffered Registers for Simultaneous Multichannel DAC Update Four Separate Rail-to-Rail Reference Inputs Thin Profile TSSOP-16 Package Available Low Tempco 1.5 ppm/؇ C APPLICATIONS Automotive Output Voltage Span Portable Communications Digitally Controlled Calibration PC Peripherals GENERAL DESCRIPTION VDD INPUT REG A SERIAL REGISTER CS INPUT REG B Quad, Serial-Input 12-Bit/10-Bit DACs AD7398/AD7399 FUNCTIONAL BLOCK DIAGRAM VREFB VREFA DAC A REGISTER DAC A VOUTA DAC B REGISTER DAC B VOUTB SDI INPUT REG C DAC C REGISTER CLK DAC C VOUTC 12/10 INPUT REG D DAC D REGISTER DAC D VOUTD The AD7398/AD7399 family of quad, 12-bit/10-bit, voltageoutput digital-to-analog converters is designed to operate from a single 3 V to 5 V or a dual ± 5 V supply. Built with Analog’s robust CBCMOS process, this monolithic DAC offers the user low cost, and ease-of-use in single or dual-supply systems. The applied external reference VREF determines the full-scale output voltage. Valid VREF values include VSS < VREF < VDD that result in a wide selection of full-scale outputs. For multiplying applications ac inputs can be as large as ± 5 VP. A doubled-buffered serial-data interface offers high-speed, 3-wire, SPI and microcontroller-compatible inputs using serialdata-in (SDI), clock (CLK), and a chip-select (CS). A common level-sensitive load-DAC strobe (LDAC) input allows simultaneous update of all DAC outputs from previously loaded Input Registers. Additionally, an internal power ON reset forces the output voltage to zero at system turn ON. An external asynchronous reset (RS) also forces all registers to the zero code state. A programmable power-shutdown feature reduces power dissipation on unused DACs. Both parts are offered in the same pinout to enable users to select the appropriate resolution for their application without redesigning the layout. For 8-bit resolution applications see the pin compatible AD7304 product. The AD7398/AD7399 is specified over the extended industrial (–40°C to +125°C) temperature range. Parts are available in wide body SOIC-16 and ultracompact thin 1.1 mm TSSOP16 packages. POWER ON RESET VSS RS LDAC VREFC VREFD GND 0.50 0.40 0.30 0.20 DNL – LSB VDD = +5V VSS = –5V VREF = +2.5V TA = 25؇C 0.10 0 –0.10 –0.20 –0.30 –0.40 –0.50 0 512 1024 1536 2560 2048 CODE – Decimal 3072 3584 4096 Figure 1. AD7398 DNL vs. Code (TA = 25 °C) REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Nor.


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