DAC0854 Datasheet | National Semiconductor

Description The DAC0854 is a plete 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 bining 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 prises a MICROWIRETM -patible 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 Features 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 k X load Synchronous asynchronous update of the DAC outputs Key Specifications Y Y Y Y Y Y Y Y Guaranteed monotonic over temperature g Integral linearity error LSB max Output settling time 2 7 ms max Analog output voltage range 0 3V to 2 8V Supply...