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Original question:

ADS5407: Design Help

ADS5407: Serial Control signals

SVJS
Prodigy 140 points
Part Number: ADS5407

We are interfacing ADS5407 ADC with Xilinx FPGA. we have a design doubt regarding the SPI control signals. Is it required of any pull up / pull down for SDO, SDENB, SDIO signals?  

  • 0
    TI__Guru* 91947 points

    SVJS,

    All of the SPI signals have weak 50K Ohm internal pull-down resistors. The Xilinx FPGA should be able to drive these without any external pull-up resistors. You may want to check the drive capability of the pins but I think you will be fine.

    Regards,

    Jim