ADC offset shift issue of TMS320F28032PAGT

Hi Jeffery,

In general DS min/max specifications incorporate aging considerations and can thus be trusted to be accurate over the life of the part. We do accelerated aging experiments (i.e. high temperature and supply voltage bake), design simulations, and/or use manufacturing process information as appropriate to determine this.

This is a bit moot for this particular parameter because we require the customer to perform self-calibration of this parameter each time the device starts up.

If the customer is particularly sensitive to offset error, they can run periodic offset re-calibration on this device (instead of just at start-up). The ControlSUITE header files provide an example of offset self-calibration that the customer can modify to run periodically. Note that the software provided in ControlSUITE is not a call-and-forget function: the customer must modify it to work with their system!

Hi Devin

Thank you for your quick response. Based on our accelerated aging experiments, could you help to tell me where this parameter will shift and why it will shift? Thanks

Best Regards
Jeffery Chen

Hi Jefferey,

This particular parameter is only specified when the customer performs self-calibration at each start-up, so aging will be automatically compensated for.