TMS320F280025: unused ADC pin

Huihuang Chen

Expert 4000 points

Part Number: TMS320F280025

Hi Champ,

In the F28004x datasheet , there have below description, but I can't found these content in the F28002x datasheet ,

Could you advise how to handle the unused ADC pin for F28002x?

over 4 years ago

0 Devin Cottier over 4 years ago

TI__Guru 60865 points

Hi Huihuang,

Not sure why the recommendation for analog pins got dropped from the datasheet, but the recommendation will be the same for F28002x; unused analog pins can be no-connected or tied low directly or through a pull-down resistor.

I'll submit to have this added to the DS.

0 Huihuang Chen over 4 years ago in reply to Devin Cottier

TI__Expert 4000 points

Hi Devin,

If no-connected, will this pin be more sensitive to the noise? if there have noise on this pin , this pin noise will affect other ADC pin result or not?

0 Devin Cottier over 4 years ago in reply to Huihuang Chen

TI__Guru 60865 points

Hi Huihuang,

The absolute best thing to do from a noise perspective would be to connect the pin to ground, but I don’t think there will be a noticeable difference.

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TMS320F280025: unused ADC pin