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PGA970: Minimum Vdd

Gerald
Genius 9570 points
Part Number: PGA970

Hi Experts,

May we ask what is the VDD voltage for PGA970? On first page of the datasheet, there is 2 different information. Text is 3.5v to 30V and in the schematic, it is written 3.3V to 30V.

->The minimum value for VDD is 3.5V or 3.3V?
->Also to confirm, Is PGA970 inside the microcontroller is sell with firmware? Does the customer need to program internal MO before use?
->Is SPI is enable per default? If not, how can I activate it?
->Is DAC output is enable per default? If not, how can I activate it?

Thank you and best regards,

Gerald

  • +1
    TI__Mastermind 18900 points

    Hi Gerald,

    Gerald said:
    ->The minimum value for VDD is 3.5V or 3.3V?

    The minimum is 3.5V, the lingering 3.3V seem to be from copying and pasting from other documents. If you can link a picture of the schematic, that would be helpful.

    Gerald said:
    ->Also to confirm, Is PGA970 inside the microcontroller is sell with firmware? Does the customer need to program internal MO before use?

    Yes, there is a baseline firmware that allows the basic functions described in the datasheet.

    Gerald said:
    ->Is SPI is enable per default? If not, how can I activate it?

    Yes, SPI and OWI are enabled by default. They can be found in the DIG_IF_CTRL

    As a reminder, its best to make sure the M0 is in reset when accessing register space. This is described in the programming tips section of the datasheet.

    Gerald said:
    ->Is DAC output is enable per default? If not, how can I activate it?

    The DAC is disabled by default and can be enabled by the DAC_CTRL_STATUS register space.

    Best,

    -Cole