- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377912 > MB89913 (Fujitsu Limited) 8-Bit Proprietary Microcontroller(8位專用微控制器) PDF資料下載
參數(shù)資料
| 型號： | MB89913 |
| 廠商： | Fujitsu Limited |
| 英文描述： | 8-Bit Proprietary Microcontroller(8位專用微控制器) |
| 中文描述： | 8位微控制器專利（8位專用微控制器） |
| 文件頁數(shù)： | 39/54頁 |
| 文件大小： | 759K |
| 代理商： | MB89913 |
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頁當(dāng)前第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
39
MB89910 Series
7. Notes on Using A/D Converter
Input impedance of the analog input pins
The A/D converter used for the MB89910 series contains a sample hold circuit as illustrated below to fetch
analog input voltage into the sample hold capacitor for eight instruction cycles after activating A/D conversion.
For this reason, if the output impedance of the external circuit for the analog input is high, analog input voltage
might not stabilize within the analog input sampling period. Therefore, it is recommended to keep the output
impedance of the external circuit low. If a higher accurancy is required, set the output impedance in this series
to 2 k
or less
.
Note that if the impedance cannot be kept low output impedance, it is recommended either to use the software
to continuously activate the A/D converter for simulating longer sampling time or to connect an external
capacitor of approx. 0.1
μ
F to the analog input pin.
Error
The smaller the | AVR – AV
SS
|, the greater the error would become relatively.
1111 1111
1111 1110
0000 0010
0000 0001
0000 0000
V
OT
V
NT
V
(N + 1)T
V
FST
Digital output
(1 LSB
×
N + V
OT
)
Analog input
Actual conversion value
Theoretical conversion value
Linearity error
1 LSB
1 LSB =
AVR
256
Linearity error =
Differential linearity error =
Total error =
V
NT
– (1 LSB
×
N + V
OT
)
1 LSB
V
( N + 1 ) T
– V
NT
1 LSB
V
NT
– (1 LSB
×
N + 0.5 LSB)
– 1
Sample hold circuit
C .
Analog channel selector
Close for 8 instruction cycles after activating
A/D conversion.
If the output
impedance of external
circuit is high
,
it is
recommended to
connect an external
capacitor of approx.
0.1
μ
F.
Analog input pin
Comparator
R .
Analog Input Equivalent Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB89915 | 8-Bit Proprietary Microcontroller(8位專用微控制器) |
| MB89PV910 | 8-Bit Proprietary Microcontroller(8位專用微控制器) |
| MB8991x | 8-bit Proprietary Microcontroller |
| MB89P915 | 8-bit Proprietary Microcontroller |
| MB89915P-SH | Hex Schmitt-trigger Inverters 14-CFP -55 to 125 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB89913PF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89913P-SH | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89915 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89915PF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89915P-SH | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。