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About pin processing of AVREFP and AVREFM of A/D converter

Last Updated:01/16/2018

Question:

When AVREFP and AVREF are both used as a reference voltage for the A/D converter, would it be better to connect a bypass capacitor between each pin?

Answer:

Connecting a capacitor between AVREFP and AVREFM is effective as a countermeasure against noise.
There is no specified recommended value. When connecting a capacitor, the capacitance must be lower than that of the capacitor (approx. 0.1 μF) that is connected between VDD and VSS (power supply line).
Suitable Products
RL78/F12
RL78/F13
RL78/F14
RL78/F15
RL78/D1A
RL78/G13
RL78/G14