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Can ADS112U04IPWR automatically scan all channels in 'burst' mode?

Mohan Gurunathan
Intellectual 500 points
Other Parts Discussed in Thread: ADS112U04

The ADS112U04 has a "burst" mode where it will continuously send data conversion out the UART without any user polling.  This mode is great, however I would like to know if there is a mode which automatically scans/multiplexes all 4 input channels while also transmitting the data in a "burst" fashion.  Or, do I have to send TX commands to switch the MUX ?  Please let me know.

Thanks,

Mohan

p.s.  I clicked "I don't have a part number" because the TI form doesn't recognize the p/n:  ADS112U04

  • 0
    TI__Guru** 113765 points

    Hi Mohan,

    Unfortunately there is no auto scan feature for the ADS112U04.  You have to manually change the mux input channels via WREG commands.

    Best regards,

    Bob B

  • 0 in reply to Bob Benjamin
    Intellectual 500 points

    Thank you Bob.  This is unfortunate, it would be a very useful feature to have on an otherwise great looking part.

  • 0 in reply to Mohan Gurunathan
    TI__Guru** 113765 points

    Hi Mohan,

    I agree that it would be useful to have an auto scan feature, but this becomes much more complicated than you might think.  You need to have additional transmission of information regarding which input channels are being measured so you can determine where you are in the scan.  The additional features would require additional registers and processing power.  This will add to digital power consumption.  Then there are timing considerations that must be taken into account when switching channels.  The list goes on and on.  In the end, there are so many possible combinations that it really makes much more sense and the device will have faster throughput if controlled by a lower powered micro to handle the decisions.  So this is something we consider, but it is outside the scope of this part.

    Best regards,

    Bob B