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[ADuC7026]external Voltage reference device selection

sofy
  •  Analog Employees 
on Aug 21, 2015

Hello,

When I choose external reference for ADuC7026's ADC, which should I choose external Vref at the point of view about output current ?

I cannot find a specification of external reference on ADuC7026 (Rev.F) datasheet.

Thank you for your help in advance.

Best regards,

Sofy

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    •  Analog Employees 
    on Aug 21, 2015 4:17 AM

    As in the data-sheet specified - a external reference should be in the range from 0.625V to AVDD.

    As can be expected the output current to the Vref input isn't that big - so as a guidance you can start with the  ADR291 specifications- we placed on the evaluation-boards.

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    •  Analog Employees 
    on Aug 21, 2015 4:17 AM

    As in the data-sheet specified - a external reference should be in the range from 0.625V to AVDD.

    As can be expected the output current to the Vref input isn't that big - so as a guidance you can start with the  ADR291 specifications- we placed on the evaluation-boards.

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