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ADS8864 Doesn´t work in 4-Wire without bus indicator mode

Other Parts Discussed in Thread: ADS8864

Hi there, 

I am working with the ads8864 ADC.

When I'm using the ADS8864 in the 3-wire without bus indicator mode it's working properly, but in my design I need to share the same SPI Bus with two ADS8864 and the mode indicated by the datasheet to this  is the  4-Wire without bus indicator mode but it doesn't  work.

Have you guys worked with the ASD8864 in the mode? 

I appreciate your support!

  • Hi Jose,

    I'm not sure what your exact problem is, if it doesn't work when you use 4-wire without bus indicator shown in below figure 1, please upload your timing screenshot for digital signals and it will be helpful to figure out the reason.

    If you still  want to use 3-wire for two ADS8864 ADCs and the  4-Wire without bus indicator mode shown as below is not a perfect solution and doesn't work  for you, Daisy-Chain with or without a busy indicator mode may be a solution, please refer to figure 2.

    Please help to confirm, thanks.

    Regards

    Dale