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DAC7800

Oguz Kazan
Prodigy 10 points
Other Parts Discussed in Thread: DAC7800

Dear all,

The microcontroller we are using can send 8-bit data in SPI. It can output 4MHz clock maximum for SPI. Can we use that microcontroller with DAC7800 concerning the clock rate and the number of bits of the data?

Thank you in advance.

  • 0
    TI__Mastermind 20541 points

    Hi Oguz,

    I understand your concern. The description for the DAC7800 in the datasheet says “The DAC7800 features a serial interface capable of clocking in data at a rate of at least 10MHz.” This is a typo, there is no minimum clock frequency requirement of 10MHz for the DAC7800.

    If you look at page 4 of the datasheet under the timing characteristics, the minimum CLK pulse width is 40ns which implies a minimum clock period of 80ns, or a maximum CLK frequency of 12.5MHz, so a 4MHz clock is acceptable.

    Regards,

    Neeraj