AD7927: Vdrive voltage

Question In page 3 of the datasheet, the specification indicates that the analog input can be 0~2*REFin. The condition is AVDD/VDRIVE=4.75~5.25V. It requires both AVDD and VDRIVE to be 5V. However, in the datasheet, it says the Vdrive can be 3V to interface 3V MCU even at AVDD = 5V. Whether the VDRIVE needs to be 5V as well when he choose 0~2*REFin input range. I used 3V MCU in the system. Answer There is no need to use the same voltage value for both supplies. The AVDD should be tied to 4.75-5.25 V but VDRIVE pin can be connected to lower voltage, for example 3 V.

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AD7927 Production
The AD7927 is a 12-bit, high speed, low power, 8-channel, successive approximation ADC. The part operates from a single 2.7 V to 5.25 V power supply and...
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AD7927 on Analog.com

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