Below is the example of ADXRS300 Application Circuit Diagram where both AVCC and PDD have a separate decoupling
capacitor. This device is known as “gyroscope” or a complete (low cost)
angular rate sensor that integrated with all of the required
According to the ADXRS300 datasheet,
to minimize the noise injected by the charge pump that uses the PDD
supply both AVCC and PDD should be placed as close to the their
respective pins as possible before routing to the system analog supply.
You should also consider to use only power supplies used for supplying
ADXRS300 analog circuits since digital circuit supplies may have adverse
affects on device operation from its high frequency noise and
Another sections in the ADXRS300 datasheet are ADXRS300 Pin Descriptions (diagram), ADXRS300 Block Diagram
with External Components schematic, how to set ADXRS300 bandwith,
increasing its full-scale measurement, to use ADXRS300 with a
supply-ratometric ADC, null adjustment, a self-test feature function,
the availability of continuous self test techniques.
Complete read The ADXRS300 Datasheet and Application Circuit Diagram can be found in this datasheet here (source: analog.com).