When using an A/D converter, is it OK to apply different power supplies to the VCC pin and VREF pin? [2009/08/05]
Yes. It is possible when the recommended operating conditions below are guaranteed:
- VREF ≦ VCC (within the recommended operating limits)
- If an AVSS pin exists, connect the VSS pin and AVSS pin together.
In addition, when different power supplies are applied to the VCC pin and VREF pin, please connect a bypass capacitor between the VREF pin and AVSS (VSS) pin.