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TMS320F28027: TMS320F2802x ADCIN > ADC VREFHI

HS FAE Germany
Mastermind 32700 points

Part Number: TMS320F28027

Hello,customer uses a F28027 with VCC of VDD=3.3V and a external ref of 3.0V. What happens if ADCIN is in the range 3.0 to 3.3V?
- is this allowed or does this damage the MCU?
- is crosstalk expected?

Regards, Holger

  • 0
    Guru 192875 points

    Hi Holger,

    HS WG-FAE said:
    What happens if ADCIN is in the range 3.0 to 3.3V?

    The result register would simply saturate to 4095 above 3V. ADC pins are safe till 3.3V, so no chance of damaging the pin.

    Regards,

    Gautam