Agilent Technologies N5416A Manuale Utente Scaricare il pdf (Pagina 20)

Proper Decoupling

• Prevent signal integrity problems by

understanding how to properly decouple power

and grounds on your chip

• Bulk vs filter capacitance

– Electrolytic Bulk Capacitance

C = I / (dV/dt), size in uF depends on max transients

For example: I peak = 3A, Vnom = 3.3V, 10% V tolerance,

10usec delta time

C = 3A*(10us/(3.3V*0.10) = 90.9uF => use 100uF Bulk cap*

– Ceramic High Frequency Capacitance

Typical values are 0.01uF, 0.1uF to 1uF depending on

filtering frequency needed

Design

*note: Devices are required to limit inrush on hot attach by limiting load to

10uF in parallel with 44ohms.

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Agilent Technologies N5416A Manuale Utente Pagina 20