CHAPTER 12 A/D CONVERTER
193
User’s Manual U11302EJ4V0UM
(7) AV
REF
pin
This pin inputs the A/D converter reference voltage.
It converts signals input to ANI0 to ANI7 into digital signals according to the voltage applied between
AV
REF
and AV
SS
.
Caution A series resistor string of approximately 10 k
Ω
is connected between the AV
REF
pin and
the AV
SS
pin. Therefore, if the output impedance of the reference voltage source is high,
this will result in series connection to the series resistor string between the AV
REF
pin
and the AV
SS
pin, and there will be a large reference voltage error.
(8) AV
SS
pin
Ground potential pin of the A/D converter. It must be at the same level as the V
SS
pin even if the A/D
converter is not used.
(9) AV
DD
pin
Analog power supply pin of the A/D converter. It must be at the same level as the V
DD
pin even if the
A/D converter is not used.
Содержание mPD780208 Subseries
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