Maxim-integrated 78M6610+PSU Hardware Design Guidelines Manual do Utilizador descarregar pdf (Página 10)

78M6610+PSU Hardware Design Guidelines AN_6610_107

10 Rev 0

GNDD

3P3A

3P3D

GNDA

1000pF

22µF

(BULK)

3P3

Place Capacitors

Close to

3P3A

0.1µF

CAPACITOR’S

DISTANCE FROM

78M6610+PSU

0.1µF

78M6610+PSU

The basic power supply filter connections are shown in Figure 6, showing also the required decoupling

capacitors. 3.3 VDC bypassing incorporates the combination of three different capacitor values. A 1000

pF in parallel with a 0.1 µF ceramic capacitor must be placed as close as possible to the 78M6610+PSU

3P3A

pin. Place the 1000 pF capacitor closest to the V

3P3A

pin of the 78M6610+PSU. An additional 22 µF

bulk capacitor is placed in the vicinity of the V

3P3D

pin to provide decoupling for the external DIO circuitry.

These three capacitor values provide decoupling over a wide frequency spectrum.

Figure 6: Power Supply Decoupling

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Maxim-integrated 78M6610+PSU Hardware Design Guidelines Manual do Utilizador Página 10