DAC0854CIWM Datasheet

8-bit Voltage-output


Features, Applications
DAC0854 Quad 8-Bit Voltage-Output Serial D A Converter with Readback

The is a complete quad 8-bit voltage-output digital-to-analog converter that can operate on a single 5V supply It includes on-chip output amplifiers internal voltage reference and a serial microprocessor interface By combining in one package the reference amplifiers and conversion circuitry for four D A converters the DAC0854 minimizes wiring and parts count and is hence ideally suited for applications where cost and board space are of prime concern The DAC0854 also has a data readback function which can be used by the microprocessor to verify that the desired input word has been properly latched into the DAC0854's data registers The data readback function simplifies the design and reduces the cost of systems which need to verify data integrity The logic comprises a MICROWIRETM -compatible serial interface and control circuitry The interface allows the user to write to any one of the input registers or to all four at once The latching registers are double-buffered consisting of 4 separate input registers and 4 DAC registers Double buffering allows all 4 DAC outputs to be updated simultaneously The four reference inputs allow the user to configure the system to have a separate output voltage range for each DAC The output voltage of each DAC can range between 0 3V and 2 8V and is a function of VBIAS VREF and the input word


Single a 5V supply operation MICROWIRE serial interface allows easy interface to many popular microcontrollers including the COPSTM and HPCTM families of microcontrollers Data readback capability Output data can be formatted to read back MSB or LSB first Versatile logic allows selective or global update of the DACs Power fail flag Output amplifiers can drive 2 kX load Synchronous asynchronous update of the DAC outputs

Guaranteed monotonic over temperature g Integral linearity error LSB max Output settling time 7 ms max Analog output voltage range 2 8V Supply voltage range 5 5V Clock frequency 10 MHz max Power dissipation (fCLK e 10 MHz) 95 mW max On-board reference g 2% max


Automatic test equipment Industrial process controls Automotive controls and diagnostics Instrumentation

Industrial DAC0854BIWM DAC0854CIWM Military 883 J20A Ceramic DIP Package N20A Molded DIP J20A Ceramic DIP M20B Small Outline

COPSTM HPCTM and MICROWIRETM are trademarks of National Semiconductor Corporation C1995 National Semiconductor Corporation

2) Soldering Information J Package (10 sec ) N Package (10 sec ) SO Package Vapor Phase (60 sec ) Infrared (15 sec ) (Note 7) Storage Temperature 220 C

If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications (Note 24) Supply Voltage (AVCC DVCC) Supply Voltage Difference (AVCC � DVCC) Voltage at Any Pin (Note 3) GND 3V to AVCC DVCC 0 3V Input Current at Any Pin (Note 3) Package Input Current (Note 4) Power Dissipation (Note 5) ESD Susceptibility (Note 5 5V

g IV Supply Voltage Difference (AVCC b DVCC) Temperature Range TMIN TA k TMAX DAC0854CMJ 883

The following specifications apply for AVCC e DVCC e 5V VREF 2 65V VBIAS 2 kX (RL is the load resistor on the analog outputs � pins 11 14 and 19) and fCLK e 10 MHz unless otherwise specified Boldface limits apply for e TJ from TMIN to TMAX All other limits apply for 25 C Symbol STATIC CHARACTERISTICS n Resolution Monotonicity Integral Linearity Error DAC0854CIWM DAC0854CMJ Differential Linearity Error Fullscale Error Fullscale Error Tempco Zero Error Zero Error Tempco Power Supply Sensitivity DYNAMIC CHARACTERISTICS ts a tsb Positive Voltage Output Settling Time Negative Voltage Output Settling Time Digital Crosstalk Digital Feedthrough Clock Feedthrough Channel-to-Channel Isolation Glitch Energy Peak Value of Largest Glitch PSRR Power Supply Rejection Ratio (Note 22) (Note 200 pF (Note 200 pF (Note 17) (Note 18) (Note 19) (Note 20) (Note

Converter Electrical Characteristics (Continued) The following specifications apply for AVCC e DVCC e 5V VREF 2 65V VBIAS 2 kX (RL is the load resistor on the analog outputs � pins 11 14 and 19) and fCLK e 10 MHz unless otherwise specified Boldface limits apply for e TJ from TMIN to TMAX All other limits apply for 25 C

Symbol Parameter Conditions Typical (Note 3) Limit (Note 4) Units (Limits)

DIGITAL AND DC ELECTRICAL CHARACTERISTICS VIN(1) VIN(0) IIL CIN COUT VOUT(1) VOUT(0) VINT IS Logical ``1'' Input Voltage Logical ``0'' Input Voltage Digital Input Leakage Current Input Capacitance Output Capacitance Logical ``1'' Output Voltage Logical ``0'' Output Voltage Interrupt Pin Output Voltage Supply Current ISOURCE 8 mA ISINK 10 kX Pullup Outputs Unloaded 14 AVCC e DVCC 5 5V AVCC e DVCC 5V V (min) V (max) mA (max) pF V (min) V (max) V (max) mA

REFERENCE INPUT CHARACTERISTICS VREF RREF CREF Input Voltage Range Input Resistance Input Capacitance Full-Scale Data Input V kX (min) kX (max) pF

VBIAS INPUT CHARACTERISTICS VBIAS Input Voltage Range Input Leakage CBIAS Input Capacitance mA pF

BANDGAP REFERENCE CHARACTERISTICS (CL e 220mF) VREFOUT DVREF DT Output Voltage Tempco Line Regulation DVREF DIL Load Regulation (Note 5V k VCC 4 mA CMJ Suffix 0 mA VREFOUT 2% V ppm mV mA

AC ELECTRICAL CHARACTERISTICS tDS tDH tCS tCH tMIN tH tL Data Setup Time Data Hold Time Control Setup Time Control Hold Time Clock Frequency Minimum Clock High Time Minimum Clock Low Time ns (min) ns (min) ns (min) ns (min) MHz (max) ns (min) ns (min)



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