Datasheet

RL78/L12 CHAPTER 11 A/D CONVERTER
R01UH0330EJ0200 Rev.2.00 380
Dec 13, 2013
(10) Internal equivalent circuit
The equivalent circuit of the analog input block is shown below.
Figure 11-40. Internal Equivalent Circuit of ANIn Pin
ANIn
C1 C2
R1
Table 11-6. Resistance and Capacitance Values of Equivalent Circuit (Reference Values)
AVREFP, VDD ANIn Pins R1 [kΩ] C1 [pF] C2 [pF]
3.6 V ≤ VDD ≤ 5.5 V ANI0 and ANI1 14 8 2.5
ANI16 to ANI23 18 8 7.0
2.7 V ≤ VDD ≤ 3.6 V ANI0 and ANI1 39 8 2.5
ANI16 to ANI23 53 8 7.0
1.8 V ≤ VDD ≤ 2.7 V ANI0 and ANI1 231 8 2.5
ANI16 to ANI23 321 8 7.0
1.6 V ≤ VDD < 2.7 V ANI0 and ANI1 632 8 2.5
ANI16 to ANI23 902 8 7.0
Caution The A/D converter’s internal voltage cannot be used in SNOOZE mode.
Remark The resistance and capacitance values shown in Table 11-6 are not guaranteed values.
(11) Starting the A/D converter
Start the A/D converter after the AV
REFP and VDD voltages stabilize.