參數(shù)資料
型號： MB95F156HPMC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP52
封裝： 10 X 10 MM, 1.70 MM HEIGHT, 0.65 MM PITCH, PLASTIC, LQFP-52
文件頁數(shù)： 44/57頁
文件大?。?/td> 663K
代理商： MB95F156HPMC
MB95150H Series
49
(2) Notes on Using A/D Converter
About the external impedance of analog input and its sampling time
A/D converter with sample and hold circuit. If the external impedance is too high to keep sufficient sampling
time, the analog voltage charged to the internal sample and hold capacitor is insufficient, adversely affecting A/
D conversion precision. Therefore, to satisfy the A/D conversion precision standard, consider the relationship
between the external impedance and minimum sampling time and either adjust the register value and operating
frequency or decrease the external impedance so that the sampling time is longer than the minimum value. Also,
if the sampling time cannot be sufficient, connect a capacitor of about 0.1
F to the analog input pin.
About errors
As |VCC
VSS| becomes smaller, values of relative errors grow larger.
R
C
Analog input
Note : The values are reference values.
Analog input equivalent circuit
RC
4.5 V
≤ VCC ≤ 5.5 V
2.0 k
(Max)
16 pF (Max)
4.0 V
≤ VCC < 4.5 V
8.2 k
(Max)
16 pF (Max)
Comparator
During sampling : ON
0
2
46
8
10
12
14
0
10
20
30
40
50
60
70
80
90
100
VCC
≥ 4.5 V
VCC
≥ 4.0 V
01
23
4
0
2
4
6
8
10
12
14
16
18
20
VCC
≥ 4.5 V
VCC
≥ 4.0 V
(External impedance
= 0 k to 100 k)
(External impedance
= 0 k to 20 k)
Minimum sampling time [
s]
External
impedance
[k
]
Minimum sampling time [
s]
External
impedance
[k
]
The relationship between external impedance and minimum sampling time
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參數(shù)描述
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MB95F156JPMC 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Microcontroller
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