If i use a AVdd of 5V and buffer on(ADuC7122) or external reference (ADuC7023) , then can i use signals with 5V input to ADC pins as well as output of 5V from DAC pins.

Please refer to page 6 of ADuC7122 and page 7 of ADuC7023. In respective pages it is mentioned Buffer Enabled single-ended mode (ADuC7122) and External Reference input voltage range as 0 to AVdd.

Please suggest an alternate method to use an input and output range of 5V if above maximum rated voltage operation will degrade uC and its performance.

Please suggest the best external oscillator part which can be used with above microcontrollers.

Regards

Bivin George

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