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ADS1293: ADS1293 SPI I/O 1.8V level connection question

Wei Ken Ting
Prodigy 210 points
Part Number: ADS1293


Hi TI team ,

ADS1293 spec mention supply power range as below :

1. Analog Supply Voltage: 2.7 V to 5.5 V 

2. Digital I/O Supply Voltage: 1.65 V to 3.6 V

Please refer block as below , MCU SPI connect to ADS1293 for 1.8V I/O level . Is it workable in this Circuit architecture ?  

  • 0
    TI__Guru 50026 points

    Hello Wei,

    Yes, the power supply scheme should work fine.

    As mentioned in the datasheet, for analog supply voltage of < 3.6V (3.3V in your case), the digital I/O supply voltage range from 1.65 to 3.3V.

    With I/O supply voltage of 1.8V, there should not be any problem.