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ADS7038-Q1: SPI SDO default state

Vishwas H R
Prodigy 40 points
Part Number: ADS7038-Q1
Other Parts Discussed in Thread: ADS7038,

Hello,

Can you please share internal structure of SPI?

let’s say my chip select will be low before SPI master is powered on and ADS7038 is ON. What will be the default voltage at SDO pin and can we configure it to 0?

  • 0
    TI__Guru**** 175171 points

    Hi Vishwas,

    Welcome to our e2e forum!  From power up of the ADS7038-Q1, there should not be anything in the SDO buffer so the output would be 0.  However, there is no way to guarantee that will always be the case.  For example, if your SPI controller turns off  after a conversion that had the LSB 'set', when you power back up you would still see that 1 on the SDO pin.