UPD78F0138 NEC, UPD78F0138 Datasheet - Page 271

• Manufacturer Part Number: UPD78F0138
• Description: (UPD78xxxx) 8-Bit Single-Chip Microcontrollers
• Manufacturer: NEC

(13) Internal equivalent circuit
The equivalent circuit of the analog input block is shown below.
Remarks 1. The resistance and capacitance values shown in Table 12-4 are not guaranteed values.
Table 12-4. Resistance and Capacitance Values of Equivalent Circuit (Reference Values)
2. n = 0 to 7
AV
2.7 V
4.5 V
Figure 12-22. Internal Equivalent Circuit of ANIn Pin
REF
ANIn
12 kΩ
4 kΩ
R1
CHAPTER 12 A/D CONVERTER
User’s Manual U16228EJ2V0UD
2.7 kΩ
C1
8 kΩ
R2
R1
8 pF
8 pF
C1
C2
R2
1.4 pF
3 pF
C2
C3
2 pF
2 pF
C3
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