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MSP430F67471A: Shared the Vref+ pin with ADC10 and SD24.

Kaka
Guru 24520 points
Part Number: MSP430F67471A


Hi TI Experts, 

Please let me confirm the following question.

[Question]

Can customer use/set the reference voltage of external Vref+ pin for ADC10 and SD24 at the same time?

Best regards.

Kaka

  • 0
    TI__Guru**** 202106 points
    Hi Kaka,

    Vref+ refers to the built-in reference voltage which cannot be output on this device. You must be talking about the Veref+ pin which supports the ADC10 and VREF pin for the SD24. The external voltage reference for the SD24_B peripheral should be between 1 and 1.5 V (typically 1.2 V) whereas the ADC10_A requires from 1.4 V to AVcc. Although there is a small overlap from 1.4 to 1.5 V it is not recommended to use the same external reference to supply the separate external reference pins of each module.

    Regards,
    Ryan
  • 0 in reply to Ryan Brown1
    Guru 24520 points
    Hi Rayn

    Thank you for your comment.
    I got it.
    Best regards.
    Kaka

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