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POWER SUPPLY NOTES

Two different strategies can be used to minimize power supply noise/interference.

a) Recommended strategy: keep analog and digital power supply rails separate. This requires to use two sets

of capacitors, one from AVCC to AGND and the other from DVCC to DGND.

Figure 10.

b) Low cost strategy: tie analog and digital power supplies together as close as possible to GND and VCC pins.

This allows to use only one set of capacitors between VCC and GND.

Figure 11.

VCCP

STw5093

D98TL412

100nF

10

µF

AVCC

VCCA

GNDP

GNDA

GND

100nF

AGND

AGND

DGND

DVCC

AGND

DGND

VCC

VCCP

STw5093

D98TL413

10

µF

VCCA

GNDP

GNDA

GND

100nF

VCC