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SN8P1700
8-bit micro-controller build-in 12-bit ADC
SONiX TECHNOLOGY CO., LTD
Page 174
Revision 1.93
GENERAL PCB POWER LAYOUT
ANALOG AREA
DIGITAL AREA
HIGH FREQUENCY/NOISY AREA
GROUND
POWER
ANALOG AREA
DIGITAL AREA
HIGH FREQUENCY/NOISY AREA
GROUND
POWER
Under circuit working condition, there are transient current, voltage or external noise through the power line and make
the power not stable. The power changing may let the system operating error or fail. To separate the PCB to different
area is a good solution and work. In above the diagram, the power and ground are together and have the same
direction. The PCB board separates to three areas. There is one power source into the PCB and separate three
channels into each area. One area just only looks like within a single power. This way can get a good and unique
power of each area.