ADC of ADuC7026

Hi

Could you please tell me the following questions?

The ADC of ADuC7026 accepts an analog input range of 0 V to VREF(2.5V).

But I want to use an analog input range of 0V to 3.3V.

Is it possible to use an analog input of 0 to 3.3V?

If it is possible, could you please tell me how to set?

Thanks and Best Regards,

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  • 0
    •  Analog Employees 
    on Nov 5, 2012 11:08 PM over 8 years ago

    hi Hide,

    The input signal is limited by the reference voltage. If you use an external 3.3V reference, then your analog input range becomes 0V to 3.3V.

    Note that the supply must be at least 3.3V also in this scenario.

    External reference input specification is 0.625V to AVDD.

    and AVDD is 2.7V to 3.6V.

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  • 0
    •  Analog Employees 
    on Nov 5, 2012 11:08 PM over 8 years ago

    hi Hide,

    The input signal is limited by the reference voltage. If you use an external 3.3V reference, then your analog input range becomes 0V to 3.3V.

    Note that the supply must be at least 3.3V also in this scenario.

    External reference input specification is 0.625V to AVDD.

    and AVDD is 2.7V to 3.6V.

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