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The DAC081C081 IS SUPPOSED TO BE AN 8-BIT BUT THE DATA SHEET SHOWS IT TO BE A 12-BIT WITH 16-BIT ENTRY. HUH???

dave miga
Prodigy 60 points
Other Parts Discussed in Thread: DAC081C081, DAC121C081

The DAC081C081 IS SUPPOSED TO BE AN 8-BIT BUT THE DATA ONLY SHOWS HAVING TO USE A 12 BIT ENTRY, BUT PAGE 18 ALSO INDICATES THAT 16-BIT ENTRIES MUST BE DONE. TOTALLY CONFUSING. HOW DO I SIMPLY PUT IN AN 8-BIT VALUE? IS THERE A CORRECT DATASHEET I CAN USE TO

  • 0
    Prodigy 70 points
    Looking at the datasheet, the DAC register has 16 bits, but only eight of those are used to determine the analog output voltage in the DAC081C081. Two of the other bits are used for configuration, and the rest is just zero-padding.

    I didn't check this, but I would assume that the other DACs from that family like the DAC121C081 (which is a 12-bit DAC) use the same format. That would make them compatible, so that it's easier to switch from one to the other. So if you were using the DAC121C081 and figured out that you really only needed 8 bits after all, you could simply swap it for the DAC081C081 and not have to change your communication protocol.