HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 557

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

19.9
When using the A/D converter, note the points listed in section 19.7.1 below.
19.9.1
19.9.2
To prevent damage from voltage surges at the analog input pins (AN0 to AN3), connect an input
protection circuit like the one shown in figure 19.11. The circuit shown also includes an RC filter
to suppress noise. This circuit is shown as an example; The circuit constants should be selected
according to actual application conditions. Table 19.4 lists the analog input pin specifications and
figure 19.12 shows an equivalent circuit diagram of the analog input ports.
Analog Input Voltage Range: During A/D conversion, the voltages input to the analog input
pins ANn should be in the range AV
AV
0.2 V and AV
CC
, AV
Usage Note
Setting Analog Input Voltage
Processing of Analog Input Pins
SS
, Input Voltage: AV
SS
Note:
Figure 19.11 Example of Analog Input Protection Circuit
= V
Figure 19.12 Analog Input Pin Equivalent Circuit
*
SS
*
.
10 F
AN0 to AN3
CC
0.01 F
0.1 F
100
SS
and AV
1.0 k
ANn
SS
AV
AN0 to AN3
AV
should be related as follows: AV
AV
CC
SS
20 pF
CC
SuperH microprocessor
(n = 0 to 3).
Rev. 4.00, 03/04, page 511 of 660
1 M
CC
= V
CC
Q ±