mb91307r Fujitsu Microelectronics, Inc., mb91307r Datasheet - Page 89

• Manufacturer Part Number: mb91307r
• Description: 32-bit Microcontroller Cmos Fr60 Mb91307 Series
• Manufacturer: Fujitsu Microelectronics, Inc.

• About errors
• The relationship between external impedance and minimum sampling time
• To satisfy the A/D conversion precision standard, consider the relationship between the external impedance
• If the sampling time cannot be sufficient, connect a capacitor of about 0.1 mF to the analog input pin.
As | AVRH | becomes smaller, values of relative errorsgrow larger.
and minimum sampling time and either adjust the operating frequency or decrease the external impedance
so that the sampling time is longer than the minimum value.
100
External impedance = 0 kΩ to 100 kΩ
90
80
70
60
50
40
30
20
10
0
MB91V307R
0
Minimum sampling time [µs]
5
10
MB91307R
MB91306R
15
20
25
30
35
20
18
16
14
12
10
8
6
4
2
0
External impedance = 0 kΩ to 20 kΩ
0
MB91V307R
1
Minimum sampling time [µs]
MB91307 Series
2
MB91307R
MB91306R
3
4
5
6
7
8
89