I assigned following structure.
IOVDD : 1.8V
AVDD : 3.3V.
But IOVDD pin of ADuCM outputs 2.2V to out side of chip.
Why does it outputting ?
- Our host DSP is using 1.8V digital interface.
- The absolute voltage input of ADC is 2.5V.
Thus I have designed above.
Can I use 2 voltages for each inputs ?