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ADS1299: Input Multiplexer configration

Rock Su
Intellectual 2220 points

Part Number: ADS1299

Dear colleague,

MUX=000, SRB1=1, whether SRB1 input is connected to INxN? If they are connected, can we open it?

Customer need is INxP and INxN form a differential input or INxP and SBR1 form a differential input.

How to realize it?

Thanks a lot!

Best Regards,

Rock Su

  • 0
    TI__Guru 57662 points

    Hi Rock,

    When enabling SRB1, SRB1 will be connected to all negative inputs such that all input channels are deferentially measured INxP and SRB1. 

    If SRB1 is not used, then all inputs will be INxP and INxN. 

    Alternatively, SRB2 can be used to connect to the positive input channels. Each channel has it's own SRB2 bit in the register settings and it is not required that all positive inputs be connected to SRB2 as they can be chosen individually.