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DAC0854CIWMXNS N/a3614avaiQuad 8-Bit Voltage-Output Serial D/A Converter with Readback


DAC0854CIWMX ,Quad 8-Bit Voltage-Output Serial D/A Converter with ReadbackFeaturesY aSingle 5V supply operationThe DAC0854 is a complete quad 8-bit voltage-output digi-Ytal- ..
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DAC0854CIWMX
Quad 8-Bit Voltage-Output Serial D/A Converter with Readback
TL/H/11261
DAC0854
Quad
8-Bit
Voltage-Output
Serial
D/A
Converter
with
Readback
January 1995
DAC0854 Quad 8-Bit Voltage-Output
Serial D/A Converter with Readback
General Description
The DAC0854isa complete quad 8-bit voltage-output digi-
tal-to-analog converterthatcan operateona single5V sup-
ply. Itincludes on-chip output amplifiers,internalvoltageref-
erence,anda serial microprocessor interface.By combining one packagethe reference, amplifiers, and conversion
circuitryfor four D/A converters,the DAC0854 minimizes
wiringand parts countandis hence ideally suitedfor appli-
cations where costand board spaceareof prime concern.
The DAC0854 alsohasa data readback function, whichcan usedbythe microprocessorto verify thatthe desired
input word has been properly latchedintothe DAC0854’s
data registers.The data readbackfunction simplifies thede-
signand reducesthe costof systems which needto verify
data integrity.
The logic comprisesa MICROWIRETM-compatible serialin-
terfaceand control circuitry.The interface allowsthe userto
writetoanyoneofthe input registersortoall fourat once.
The latching registersare double-buffered, consistingof4
separate input registersand4 DAC registers. Double buffer-
ing allowsall4 DAC outputstobe updated simultaneously.
The four reference inputs allowthe userto configurethe
systemto havea separate output voltage rangefor each
DAC. The output voltageof each DACcan range between
0.3V and 2.8V andisa functionof VBIAS,VREF,andthe
input word.
Features Single a5V supply operation MICROWIRE serial interface allows easy interfaceto
many popular microcontrollers includingthe COPSTM
and HPCTM familiesof microcontrollers Data readback capability Output data canbe formattedto read back MSBor
LSBfirst Versatile logic allows selectiveor global updateofthe
DACs Powerfailflag Output amplifierscan drive2kX load Synchronous/asynchronous updateofthe DAC outputs
Key Specifications Guaranteed monotonic over temperature Integral linearity error g(/2 LSB max Output settling time 2.7ms max Analog output voltage range 0.3Vto 2.8V Supply voltage range 4.5Vto 5.5V Clock frequency 10 MHz max Power dissipation (fCLKe10 MHz) 95 mW max On-board reference 2.65V g2% max
Applications Automatictest equipment Industrial process controls Automotive controlsand diagnostics Instrumentation
Connection Diagram
TL/H/11261–1
Top View
Ordering Information
Industrial (b40§CkTA a85§C) Package
DAC0854BIN, DAC0854CIN N20A MoldedDIP
DAC0854CIJ J20ACeramicDIP
DAC0854BIWM, DAC0854CIWM M20B Small Outline
Military(b55§CkTAk a125§C)
DAC0854CMJ/883 J20ACeramicDIP
COPSTM,HPCTMand MICROWIRETMaretrademarksof National SemiconductorCorporation.
C1995National SemiconductorCorporation RRD-B30M75/PrintedinU.S.A.
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