Renesas RL78 Series

RL78/F13, F14 CHAPTER 12 A/D CONVERTER
R01UH0368EJ0210 Rev.2.10 762
Dec 10, 2015
(10) Internal equivalent circuit
The equivalent circuit of the analog input block is shown below.
Figure 12-50. Internal Equivalent Circuit of ANIn Pin
Table 12-6. Resistance and Capacitance Values of Equivalent Circuit (Reference Values)
AVREFP, VDD ANIn Pins R1 [k] C1 [pF] C2 [pF]
3.6 V  VDD  5.5 V ANI0 to ANI23 14 8 2.5
ANI24 to ANI30 18 8 7.0
2.7 V  VDD < 3.6 V ANI0 to ANI23 39 8 2.5
ANI24 to ANI30 53 8 7.0
Remark The resistance and capacitance values shown in Table 12-6 are not guaranteed values.
(11) Starting the A/D converter
Start the A/D converter after the AV
REFP and VDD voltages stabilize.
(12) Temperature sensor output
If the internal reference voltage (1.45 V) is selected as the reference voltage of comparator 0 or comparator 1 in
RL78/F14, the temperature sensor output cannot be selected.
ANIn
C1 C2
R1