Re: TMS320F28052 Analog Port Injection Current
I need to know how much analog input injection current, over the uP's temperature range, will start to affect adjacent/other A/D inputs.
This isn't a normal operating mode question, but one that might come up either at a design review, or at a failure mode effect analysis. Overdriving the A/D port with a little current can happen as I need to use it's full range and can't clamp the voltage precisely at the Vrefhi voltage and inject current into the substrate.
For instance: It might be stated that injecting up to 100 uA into an A/D input could cause other A/D counts to potentially move by 5 counts up or down, and over temperature. I realize that this information might be either measurement data, or statistical in nature. A specified amount would be best, but some relevant information is better than no information.
I haven't been able to locate information in either the uP spec, or reference manual. (It could be there and I just missed it.) I'm not looking for a voltage spec, just an injection current spec. Would someone be able to point me to/inform me of an answer?
