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28075 ControlCard Full Production Silicon

David DeBaun
Intellectual 405 points

Other Parts Discussed in Thread: CONTROLSUITE, TMDSCNCD28379D

Hello,

I ordered several TMDXCNCD28075 ControlCards with the F28075 Piccolo along with the TMDXDOCK28075 experimenter's kits and have been having noise issues with the ADCs. I've carefully followed the ControlSuite examples and Tech Reference Manual instructions for the ADC setup and initialization, and believe some of the issues may be due to the Silicon errata statements in SPRZ423C for the ADC. I'm in the process of implementing the workarounds but would like to know: 1) Does TI makes a "TMS" version of the ControlCard instead of the "TMX" version? I see an infosheet for TMDSCNCD28075 under ControlSuite but have not found it for ordering on the TI website. Also, 2) Does the "TMX" version ship with ADC Trim values in OTP, or is that only on the "TMS" version?

Thank you,

Dave

  • 0
    Guru 192875 points

    Hi Dave,

    As of now TMS samples are not into production. can you shed some light here?


    Regards,

    Gautam

  • 0 in reply to Gautam Iyer
    TI__Guru 60865 points
    Hi David,

    'Newer' TMX devices probably have ADC trims, but I am not sure exactly how to determine this from the device markings. Instead, let the device power up, and then check the following: 0x743B (offset trim - ADCA), 0x7470 (linearity trim - ADCA), 0x5D1B6 (reference trim - ADCA). If these are all 0, then your device doesn't have trim, or the trim isn't being loaded.

    The trims shouldn't have a large impact on noise performance. What exactly are you seeing that is an issue? I think you may also want to note that the reference generation circuits on some of the early ControlCards aren't quite optimal, and this could cause some noise issues.
  • 0 in reply to Devin Cottier
    TI__Guru 57255 points

    Hi David,

    At the moment, all F28075 controlCARDs will continue being TMDX, meaning the kit may contain TMX silicon.  This will likely change sometime next year and at that time we'll transition to TMDS kits.

    Please note that we just released the TMDXCNCD28379D (and shortly the TMDSCNCD28379D).  The device on these cards is very similar to your device, but a superset - containing a few extra features.  Also note that the '379D device follows the same general errata trend as your device.  All F28379D cCARD to date have been built with RevC MCUs. 

    If you want to experiment with RevC F28075 devices, for the time being, it may be worthwhile to consider getting one of these F28379D kits.  It also contains some other, more optimal, surrounding circuitry.


    Thank you,
    Brett

  • 0 in reply to Brett Larimore
    Intellectual 405 points
    Hi Devin,

    We have a need for 24 of the TMDXCNCD28075 ControlCards, and the distributor / factory stock looks like it's slimming down - any update on when TMDS ControlCard kits are coming into production for F28075? Or whether more TMDXCNCD28075 ControlCards are on the way?

    Thank you,

    Dave
  • 0 in reply to David DeBaun
    Intellectual 405 points
    Sorry - meant for Brett!
  • 0 in reply to David DeBaun
    TI__Guru 57255 points

    Hi Dave,

    It will likely be around mid-year when we will begin to sell and have stock of the TMDSCNCD28075.  We won't be making any more TMDXCNCD28075.

    Unfortunately/Fortunately, we have had a surge of orders regarding chips in this family when we moved the chips themselves to production-grade.  As a result, we're carefully managing 'F2807x  chip inventories carefully for the time being.


    Thank you,
    Brett