參數(shù)資料
型號: M38027E3-1024FP
廠商: Mitsubishi Electric Corporation
元件分類: DC/DC變換器
英文描述: 1 watt dc-dc converters
中文描述: 1瓦的DC - DC轉(zhuǎn)換器
文件頁數(shù): 156/207頁
文件大小: 2389K
代理商: M38027E3-1024FP
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頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁當前第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁第165頁第166頁第167頁第168頁第169頁第170頁第171頁第172頁第173頁第174頁第175頁第176頁第177頁第178頁第179頁第180頁第181頁第182頁第183頁第184頁第185頁第186頁第187頁第188頁第189頁第190頁第191頁第192頁第193頁第194頁第195頁第196頁第197頁第198頁第199頁第200頁第201頁第202頁第203頁第204頁第205頁第206頁第207頁
3802 GROUP USER’S MANUAL
3-30
APPENDIX
3.4 Countermeasures against noise
3.4.3 Wiring to analog input pins
G
Connect an approximately 100
to 1 k
resistor to an
analog signal line which is connected to an analog
input pin in series. Besides, connect the resistor to
the microcomputer as close as possible.
G
Connect an approximately 1000 pF capacitor across
the V
SS
pin and the analog input pin. Besides,
connect the capacitor to the V
SS
pin as close as
possible. Also, connect the capacitor across the
analog input pin and the V
SS
pin at equal length.
Reason
Signals which is input in an analog input pin (such as
an A-D converter input pin) are usually output signals
from sensor. The sensor which detects a change of
event is installed far from the printed circuit board
with a microcomputer, the wiring to an analog input
pin is longer necessarily. This long wiring functions
as an antenna which feeds noise into the
microcomputer, which causes noise to an analog
input pin.
3.4.4. Consideration for oscillator
Take care to prevent an oscillator that generates
clocks for a microcomputer operation from being
affected by other signals.
(1) Keeping an oscillator away from large current
signal lines
Install a microcomputer (and especially an oscillator)
as far as possible from signal lines where a current
larger than the tolerance of current value flows.
Reason
In the system using a microcomputer, there are
signal lines for controlling motors, LEDs, and thermal
heads or others. When a large current flows through
those signal lines, strong noise occurs because of
mutual inductance.
(2) Keeping an oscillator away from signal lines
where potential levels change frequently
Install an oscillator and a connecting pattern of an
osillator away from signal lines where potential levels
change frequently. Also, do not cross such signal
lines over the clock lines or the signal lines which are
sensitive to noise.
Reason
Signal lines where potential levels change frequently
(such as the CNTR pin line) may affect other lines at
signal rising or falling edge. If such lines cross over
a clock line, clock waveforms may be deformed,
which causes a microcomputer failure or a program
runaway.
Fig.3.4.6 Wiring for a large current signal line
Fig.3.4.7 Wiring to a signal line where potential levels
change frequently
X
IN
X
OUT
V
SS
M
Microcomputer
Mutual inductance
Large
current
GND
X
IN
X
OUT
V
SS
CNTR
Do not cross
Fig.3.4.5 Analog signal line and a resistor and a
capacitor
N.G.
O.K.
V
SS
Analog
input pin
Microcomputer
(Note)
Thermistor
Noise
Note:The resistor is for dividing resistance
with a thermister.
相關(guān)PDF資料
PDF描述
M38027E3-1024FS 1 watt dc-dc converters
M38027E3-1024SP 1 watt dc-dc converters
M38027E3-1024SS 1 watt dc-dc converters
M38027E3D1024FP 1 watt dc-dc converters
M38027E3D1024FS 1 watt dc-dc converters
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M38027E8FP 制造商:Renesas Electronics Corporation 功能描述:M16C FLASH 256K/20K, 24MHZ,DMA,I2C,IEBU - Trays
M38027E8FP#U0 制造商:Renesas Electronics Corporation 功能描述:M16C FLASH 256K/20K, 24MHZ,DMA,I2C,IEBU -LEAD FREE VERSION - Trays
M38027E8FS 制造商:Renesas Electronics Corporation 功能描述:MCU 8BIT 740 CISC 32KB EPROM 3.3V/5V 64CLCC - Bulk
M38027E8SS 制造商:Renesas Electronics Corporation 功能描述:MCU 8BIT 740 CISC 32KB EPROM 3.3V/5V 64PIN SDIP - Bulk
M3802-BLACK-100 制造商:Alpha Wire 功能描述: