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RL78/G1A CHAPTER 11 A/D CONVERTER
R01UH0305EJ0200 Rev.2.00 399
Jul 04, 2013
(10) Internal equivalent circuit
The equivalent circuit of the analog input block is shown below.
Figure 11-46. Internal Equivalent Circuit of ANIn Pin
ANIn
C1 C2
R1
Table 11-4. Resistance and Capacitance Values of Equivalent Circuit (Reference Values)
AVDD ANIn pin R1[kΩ] C1[pF] C2[pF]
ANI0 to ANI12 7.4 8 6.3 2.4 V ≤ AVDD ≤ 3.6 V
ANI16 to ANI30 12.3 8 7.4
ANI0 to ANI12 11 8 6.3 1.8 V ≤ AVDD ≤ 3.6 V
ANI16 to ANI30 41 8 7.4
ANI0 to ANI12 510 8 6.3 1.6 V ≤ AVDD ≤ 3.6 V
ANI16 to ANI30 650 8 7.4
Remark The resistance and capacitance values shown in Table 11-4 are not guaranteed values.
(11) Starting the A/D converter
Start the A/D converter after the AV
REFP and AVDD voltages stabilize.