- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45192 > MB90803PF-G 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP100 PDF資料下載
參數(shù)資料
| 型號： | MB90803PF-G |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 3.35 MM HEIGHT, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件頁數(shù)： | 81/92頁 |
| 文件大?。?/td> | 2250K |
| 代理商： | MB90803PF-G |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁當前第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁
MB90800 Series
82
DS07-13733-5E
(2) Notes on Using A/D Converter
About the external impedance of 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 sample and hold capacitor is insufficient, adversely affecting
A/D conversion precision. Therefore, to satisfy the A/D conversion precision standard, consider the relation-ship
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.
And, if the sampling time cannot be sufficient, connect a capacitor of about 0.1
F to the analog input pin.
About errors
As | AVCC
AVSS | becomes smaller, values of relative errors grow larger.
Analog input circuit model
R
C
Comparator
Analog input
RC
MB90803 (S)
1.9 k
(Max) 32.3 pF (Max)
MB90F804-201(101)/F803(S)/F809(S)
1.9 k
(Max) 25.0 pF (Max)
MB90V800
1.9 k
(Max) 32.3 pF (Max)
Note : The values are reference values.
During sampling : ON
100
90
80
70
60
50
40
30
20
10
0
5
10
15
20
25
30
35
MB90803(S)/
MB90V800
MB90F804-201(101)/
MB90F803(S)/
MB90F809(S)
20
18
16
14
12
10
8
6
4
2
0
012
3
45
7
MB90803(S)/
MB90V800
8
MB90F804-201(101)/
MB90F803(S)/
MB90F809(S)
6
(External impedance
= 0 k to 100 k)
(External impedance
= 0 k to 20 k)
Minimum sampling time [
s]
Minimum sampling time [
s]
External
impedance
[k
]
External
impedance
[k
]
The relationship between external impedance and minimum sampling time
相關PDF資料 |
PDF描述 |
|---|---|
| MB90F823PF | 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP80 |
| MB90F822PFM | 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP80 |
| MB90F867ESPMC | 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP100 |
| MB90F867EPMC | 16-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP100 |
| MB90867EPMC | 16-BIT, MROM, 24 MHz, MICROCONTROLLER, PQFP100 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MB90803S | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
| MB90803SPF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller CMOS |
| MB90803SPF-G | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
| MB90820 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Proprietary Microcontroller |
| MB90820B | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16-bit Microcontroller |
發(fā)布緊急采購，3分鐘左右您將得到回復。