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ADS1296 and ADS1298 have same pinout?

TI Lady
Genius 4025 points
Other Parts Discussed in Thread: ADS1296, ADS1298, ADS1294

I did not see a separate pinout for the 1296.  It sounds like I just need to tie the unused op-amp inputs (CH7,8) to AVDD, and leave the RESP lines floating.  Anything else I should be concerned about with the 1296?  The plan is to use one 1298 and one 1296 to create a diagnostic quality ECG system.

Please advise.

  • 0
    TI__Guru**** 181001 points

    Hi Amy -

    Yes, the ADS1296 and ADS1298 share the same package, the only difference is WRT channels 7 and 8.  They are no-connects in the ADS1296 so you can actually leave them float (open) if you like.

  • 0 in reply to Tom Hendrick
    Genius 4025 points

    The datasheet mentions connecting unused inputs to AVDD, but not sure if that is only for pins that are unused but available, or pins that are unused regardless of whether they are available.
     
    For example, if I did not use CH7,8 on a 1298, I would tie them to AVDD.  Does that still hold true for the 1296?  Just not sure if the bond wires are connected internally to anything @CH7,8 on the 1296 (i.e. to protection circuit or something like that) and whether it would make any difference if they were connected to AVDD or not . . .

  • 0 in reply to TI Lady
    TI__Mastermind 43915 points

    Hi Amy,

    Yes, for the ADS1294 and ADS1296, I would connect the those pins to AVDD through weak pull up resistors.

    Regards,

    Tony Calabria