Datasheet

78K0/Ix2 CHAPTER 11 A/D CONVERTER
R01UH0010EJ0500 Rev.5.00 399
Feb 28, 2012
(11) Internal equivalent circuit
The equivalent circuit of the analog input block is shown below.
Figure 11-27. Internal Equivalent Circuit of ANIn Pin
ANIn
C1 C2
R1
Table 11-9. Resistance and Capacitance Values of Equivalent Circuit (Reference Values)
AVREF Mode R1 C1 C2
Normal 5.2 k
High-speed 1 5.2 k
4.0 V  AVREF  5.5 V
High-speed 2 7.8 k
Normal 18.6 k 2.7 V  AVREF < 4.0 V
High-speed 2 7.8 k
8 pF 6.3 pF
Remarks 1. The resistance and capacitance values shown in Table 11-9 are not guaranteed values.
2. n = 0 to 8 (it depends on products)
3. A/D conversion result registers differ depending on trigger mode.
 Software trigger mode: ADCR, ADCRH, ADCRL registers
 Timer trigger mode: ADCRX0, ADCRX0L registers (TMX0 synchronization)
ADCRX1, ADCRX1L registers (TMX1 synchronization)