- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377910 > MB89663PF (FUJITSU LTD) Quadruple Bus Buffer Gates With 3- State Outputs 14-CFP -55 to 125 PDF資料下載
參數(shù)資料
| 型號： | MB89663PF |
| 廠商： | FUJITSU LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Quadruple Bus Buffer Gates With 3- State Outputs 14-CFP -55 to 125 |
| 中文描述： | 8-BIT, MROM, 10 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | PLASTIC, QFP-64 |
| 文件頁數(shù)： | 36/48頁 |
| 文件大?。?/td> | 652K |
| 代理商： | MB89663PF |
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頁當(dāng)前第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
MB89660 Series
36
(2) Precautions
Input impedance of analog input pins
The A/D converter used for the MB89660 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
.
When the impedance cannot be kept low, the following two methods are recommended. One is to activate the
A/D converter continuously for obtaining the pseudo long sampling time by using software. The other is to
connect the external capacitor of approx. 0.1
μ
s to the analog input pin.
Error
The smaller the | AVR – AV
SS
|, the greater the error would become relatively.
V
OT
V
NT
V
( N+I )T
V
FST
Digital output
(1 LSB
×
N + V
OT
)
0000
0000
0000
0001
1111
1111
1110
1111
1 LSB =
AVR
256
Linearity error = V
NT
(1 LSB
×
N + V
OT
)
1 LSB
Differential linearity error = V
( N + 1 ) T
V
NT
1 LSB
Analog input
Actual conversion value
Theoretical conversion value
1
Total error =
1 LSB
V
NT
(1 LSB
×
N + 1 LSB)
Linearity error
Closes for 8 instruction cycles
after activating A/D conversion.
Sample hold circuit
C
33 pF
Analog channel selector
Analog input pin
R
6 k
Comparator
If the output impedance of
the external circuit is high, it
is recommended to connect
an external capacitor of
approx. 0.1
μ
F.
.
Analog Input Equivalent Circuit
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB89665 | Quadruple Bus Buffer Gates With 3-State Outputs 14-CDIP -55 to 125 |
| MB89665P-SH | Quadruple Bus Buffer Gates With 3-State Outputs 14-CFP -55 to 125 |
| MB89665PF | Quadruple Bus Buffer Gates With 3-State Outputs 20-LCCC -55 to 125 |
| MB89P665 | 0.22A, 2.7-5.5V Single Power Distribution Switch IC Hi-Side MOSFET, Fault Report, Act-Low Enable 8-SOIC |
| MB89P665P-SH | 8-bit Proprietary Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB89663P-SH | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89663R | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89663RPF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89663RP-SH | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8-bit Proprietary Microcontroller |
| MB89665 | 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)。