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參數資料
| 型號： | MB90387PMT |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP48 |
| 封裝： | PLASTIC, LQFP-48 |
| 文件頁數： | 48/64頁 |
| 文件大?。?/td> | 1777K |
| 代理商： | MB90387PMT |
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MB91260B Series
52
DS07-16507-3E
About the external impedance of the analog input and its sampling time
A/D converter with sample & hold circuit. If the external impedance is too high to keep sufficient sampling time,
the analog voltage charged to the internal sampling and hold capacitor is insufficient, adversely affecting A/D
conversion precision. So, 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. Also, if the
sampling time cannot be sufficient, connect a capacitor of about 0.1
F to the analog input pin.
About errors
As |AVRH
AVSS| becomes smaller, values of relative errors grow larger.
C
R
Analog input circuit model
Comparator
During sampling : ON
Analog input
Note : The values are reference values.
RC
MB91263B
2.0 k
(Max) 14.4 pF (Max)
MB91264B
2.0 k
(Max) 14.4 pF (Max)
MB91F264B
2.0 k
(Max) 16.0 pF (Max)
0
2468
10
20
30
40
50
60
70
80
90
100
MB91F264B
MB91263B
MB91264B
0
123
2
4
6
8
10
12
14
16
18
20
MB91F264B
MB91263B
MB91264B
(External impedance
= 0 k to 100 k)
Minimum sampling time (
s)
E
x
te
rn
al
im
pe
da
n
c
e
(k
)
(External impedance
= 0 k to 20 k)
Minimum sampling time (
s)
E
x
te
rn
al
im
pe
da
n
c
e
(k
)
The relationship between the external impedance and minimum sampling time
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MB90387S | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontrollers CMOS |
| MB90387SPMT | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontrollers CMOS |
| MB90390 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90390_09 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90394HA | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
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