
MB90360 Series
53
(Continued)
To satisfy the A/D conversion precision standard, consider the relationship between the external impedance
and minimum sampling time and either adjust the resistor value and operating frequency or decrease the
external impedance so that the sampling time is longer than the minimum value.
If the sampling time cannot be sufficient, connect a capacitor of about 0.1
F to the analog input pin.
About errors
As | AVR
AVSS | becomes smaller, values of relative errors grow larger.
At 4.5 V ≤ AVCC ≤ 5.5 V
Minimum sampling time [
s]
(External impedance
= 0 k to 20 k)
At 4.0 V ≤ AVCC < 4.5 V
(External impedance
= 0 k to 100 k)
(External impedance
= 0 k to 20 k)
The relationship between external impedance and minimum sampling time
External
impedance
[k
]
(External impedance
= 0 k to 100 k)
MB90362/T/S/TS,
MB90367/T/S/TS,
MB90V340A-101/102/103/104
MB90F362/T/S/TS,
MB90F367/T/S/TS
100
90
80
70
60
50
40
30
20
10
0
5
10
15
20
25
30
35
MB90362/T/S/TS,
MB90367/T/S/TS,
MB90V340A-101/102/103/104
20
18
16
14
12
10
8
6
4
2
0
01
23
456
7
8
MB90F362/T/S/TS,
MB90F367/T/S/TS
Minimum sampling time [
s]
External
impedance
[k
]
MB90362/T/S/TS,
MB90367/T/S/TS,
MB90V340A-101/102/103/104
100
90
80
70
60
50
40
30
20
10
0
5
10
15
20
25
30
35
MB90F362/T/S/TS,
MB90F367/T/S/TS
MB90362/T/S/TS,
MB90367/T/S/TS,
MB90V340A-101/102/103/104
20
18
16
14
12
10
8
6
4
2
0
01
23
456
7
8
MB90F362/T/S/TS,
MB90F367/T/S/TS
Minimum sampling time [
s]
External
impedance
[k
]
Minimum sampling time [
s]
External
impedance
[k
]