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ADS1248: ADS1248 Revision number

Richard Tandy
Prodigy 120 points
Part Number: ADS1248
Other Parts Discussed in Thread: ADS1247, ADS1246

Good morning

In the ADS1248 datasheet there is mention of "Factory programmed bits used for revision identification

Is this to identify that the device type (e.g. ADS1247 vs ADS1248) or is it the device revision type (e.g. ADS1248 rev1 vs ADS1248 rev2)

Is there an explanation to understand the bit pattern that i read back from the ADS1248?

Regards

Richard

  • 0
    TI__Guru* 98025 points
    Richard,


    The ID bits are not used for device type identification (to distinguish between ADS1248, ADS1247, or ADS1246). Rather these bits indicate a device revision based on our manufacturing.


    Joseph Wu
  • 0 in reply to Joseph Wu
    Prodigy 120 points

    Hi Joseph

    Thank you for the reply

    Do you have any suggestions as to how I can identify the device in the bus?

    Currently I configure the device and then read back the register contents to ensure they are the same

    Regards

    Richard

  • 0 in reply to Richard Tandy
    TI__Guru* 98025 points
    Richard,


    I'm not sure what your asking about. Are you asking if you can distinguish between an ADS1247 or ADS1248 in the bus? Or are you asking if you can distinguish between two different ADS1248s on the bus?

    I don't think there's a good way to distinguish between ADS1247 and ADS1248 because the two versions use the same register map. As you've indicated, you might be able to write something unique to the device if you've already determined an order or id for it. As an example, if you don't use the IDAC currents, you could write a different IMAG value in the IDAC Control Register 0, and leave the IDAC outputs disconnected.

    If I've missed the point of your question, post back and we can continue discussing it.


    Joseph Wu