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16 bit drop-in replacement for 7678?

Austin Blanco
Prodigy 45 points
Other Parts Discussed in Thread: DAC7678, DAC8574, DAC8568

I've got a PCB design & control code which works beautifully with the DAC7678. I've looked around for a while on the ti site for a 16-bit drop-in replacement, , but the closest match I found was a 8568. Anyone know of a suitable replacement? Just trying to avoid rewriting the control code if possible...

  • 0
    TI__Genius 10615 points
    Hi Austin,

    Welcome to the E2E forums!

    Unfortunately we do not have any I2C compatible devices 16-bit devices with an octal channel. We do have a quad channel option on 16-bit resolution (DAC8574), but it is definitely not drop in compatible.

    I think you have already found the best solution, the DAC8568. It is a 16-bit octal channel SPI compatible interface. It would involve reworking the IO interface, but it is pin compatible (except for the digital interface pins) but it will keep you from redesigning the PCB. You need to make sure that the pins that you used to implement I2C, can accommodate for the SPI interface. In addition, the SPI interface won't require the pull-up resistors.
  • 0 in reply to Eugenio Mejia
    Prodigy 45 points

    thanks for getting back to me so quickly! I'll take a look at moving to this IC.