TheAD5346/AD5347/ AD5348 are octal 8-, 10-, and 12- bit DACs, operating from a 2.5 V to 5.5 V supply. These devices incorporate an on-chip output buffer that can drive the output to both supply rails, and also allows a choice of buffered or unbuffered reference input.The AD5346 / AD5347 / AD5348 have a parallel interface.CSselects the device and data is loaded into the input registers on the rising edge of WR. A readback feature allows the internal DAC registers to be read back through the digital port.The GAIN pin on these devices allows the output range to be set at 0 V to VREFor 0 V to 2 x VREF.Input data to the DACs is double-buffered, allowing simultaneous update of multiple DACs in a system using the LDAC pin.An asynchronous CLR input is also provided, which resets the contents of the Input Register and the DAC Register to all zeros. These devices also incorporate a power-on-reset circuit that ensures that the DAC output powers on to 0 V and remains there until valid data is written to the device. All three parts are pin-compatible, which allows the user to select the amount of resolution appropriate for their application without redesigning their circuit board.APPLICATIONSPortable battery-powered instrumentsDigital gain and offset adjustmentProgrammable voltage and current sourcesOptical networkingAutomatic test equipmentMobile communicationsProgrammable attenuatorsIndustrial process control