Datasheet

Section 19 A/D Converter
Page 922 of 1434 R01UH0166EJ0600 Rev. 6.00
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
sample-and-hold circuit in the A/D converter exceeds the current input via the input impedance
(R
in
), an error will arise in the analog input pin voltage. Careful consideration is therefore required
when deciding the circuit constants.
AVCC
*
1
*
1
Vref
AN0 to AN15
AVSS
Notes: Values are reference values.
1.
2. R
in
: Input impedance
R
in
*
2
100
0.1 µF
0.01 µF10 µF
Figure 19.7 Example of Analog Input Protection Circuit
Table 19.7 Analog Pin Specifications
Item Min Max Unit
Analog input capacitance — 20 pF
Permissible signal source impedance — 5 kΩ