The MAX509/MAX510 are quad, serial-input, 8-bit voltage-output digital-to-analog converters (DACs). Theyoperate with a single +5V supply or dual ±5V supplies.Internal, precision buffers swing rail-to-rail. The referenceinput range includes both supply rails.The MAX509 has four separate reference inputs, allowingeach DAC\'s full-scale range to be set independently.20-pin DIP, SSOP, and SO packages are available. TheMAX510 is identical to the MAX509 except it has two referenceinputs, each shared by two DACs. The MAX510is housed in space-saving 16-pin DIP and SO packages.The serial interface is double-buffered: A 12-bit inputshift register is followed by four 8-bit buffer registers andfour 8-bit DAC registers. A 12-bit serial word is used toload data into each register. Both input and DAC registerscan be updated independently or simultaneouslywith single software commands. Two additional asynchronouscontrol pins provide simultaneous updating(LDAC) or clearing (CLR) of input and DAC registers.The interface is compatible with MicrowireTM and SPI/QSPITM. All digital inputs and outputs are TTL/CMOScompatible. A buffered data output provides for readbackor daisy-chaining of serial devices.
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