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DAC7311 2pin communication

Viktor Tasevski
Intellectual 2710 points
Other Parts Discussed in Thread: DAC7311

Hi,

I was wondering if I could use the DAC7311 with the NSYNC pin hard connected to GND and just exercising the CLK and DIN pins.

Thanks,

Viktor.

  • 0
    TI__Guru 52683 points

    Viktor,

    The SYNC pin cannot be tied to GND.  To quote the datasheet, section 8.5.1.1:

    " The write sequence begins by bringing the SYNC line low. Data from the DIN line are clocked into the 16-bit shift register on each falling edge of SCLK. The serial clock frequency can be as high as 50 MHz, making the DACx311 compatible with high-speed DSPs. On the 16th falling edge of the serial clock, the last data bit is clocked in and the programmed function is executed. At this point, the SYNC line may be kept low or brought high. In either case, it must be brought high for a minimum of 20 ns before the next write sequence so that a falling edge of SYNC can initiate the next write sequence."