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参数资料
| 型号： | MB95D108AWPFV |
| 厂商： | FUJITSU LTD |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP64 |
| 封装： | 10 X 10 MM, 1.70 MM HEIGHT, 0.50 MM PITCH, PLASTIC, LQFP-64 |
| 文件页数： | 55/67页 |
| 文件大小： | 824K |
| 代理商： | MB95D108AWPFV |
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MB95100A Series
59
(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 |AVR
AVSS| becomes smaller, values of relative errors grow larger.
R
C
Analog input pin
Note : The values are reference values.
Analog input equivalent circuit
RC
2.7 V
≤ AVCC ≤ 3.6 V
1.7 k
(Max)
14.5 pF (Max)
1.8 V
≤ AVCC < 2.7 V
84 k
(Max)
25.2 pF (Max)
Comparator
During sampling : ON
0
5
10
15
20
25
30
35
40
0
10
20
30
40
50
60
70
80
90
100
01
23
4
0
2
4
6
8
10
12
14
16
18
20
(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
]
AVCC
≥ 1.8 V
AVCC
≥ 2.7 V
AVCC
≥ 2.7 V
The relationship between external impedance and minimum sampling time
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MB95D108BS | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
| MB95D108BSPFM | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
| MB95D108BSPFV | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
| MB95D108BW | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
| MB95D108BWPFM | 制造商:FUJITSU 制造商全称:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontrollers |
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