- To reduce consumption of a board powered from battery, I plan to keep off the LDO for AVDD. It powers also input buffers with maximal 30mA consumption. DVDD is powered by other LDO that powers the microcontroller that reads data from SPI. Are there side effects that AVDD is zero and DVDD is 3.3V?
According to paragraph “10.2 Power-Supply Sequencing” should be OK.
- As AVDD and DVDD are same value, it will be better to have same power supply for both than powering DVDD from the same power supply with the microcontroller?
- Considering that DVDD current is rally small it is acceptable to insert a RC filter between LDO (AVDD) and DVDD?