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Original question:

ADS1261: Dual Bridge with AC Excitation - Schematic Review

ADS1261EVM: ADS1261EVM PWDN PIN PROBLEM?

Ranjith Ramasamy
Prodigy 20 points
Part Number: ADS1261EVM

Greetings,

I have SPI interface problem with MCU and ADC

send the High value from MCU to ADC PWDN pin but the ADC PWDN pin is Low,

when I checked ADC chip pins and ground pin  with multimeter(Power off condition)

the ADC Pin16 (DGND) and Pin7 (PWDN) between resistor value is 77 Ohm,

please guide to me how to solve this problem.

Thank you

Ranjith

  • 0
    TI__Mastermind 40271 points

    Hi Ranjith,

    Are you using a modified ADS1261EVM, or is this a stock ADS1261EVM and you are using the default EVM GUI?

    If you are using an unmodified ADS1261EVM, are you sending the "power down" command and nothing is happening?

    If you are using a modified ADS1261EVM, how have you modified the board? Can you please be specific in explaining how the board is now configured and how you are communicating with the ADC?

    -Bryan