參數(shù)資料
型號(hào)： TJA1050
廠商： NXP Semiconductors N.V.
英文描述： CAN High-Speed Transceiver(CAN高速收發(fā)器)
中文描述： CAN高速收發(fā)器（的CAN高速收發(fā)器）
文件頁數(shù)： 16/31頁
文件大?。?/td> 254K
代理商： TJA1050
TJA1050 - CAN High-Speed Transceiver
Application Note
AN00020
Philips Semiconductors
16
100nF. However, it is obvious that the capacitor should be connected to a “quiet” ground level. For
example a separate ground lead to the ground pin of the module connector with lowest inductance is
recommended, if termination is placed inside of bus nodes.
The TJA1050 itself has reached such a high symmetry level that symmetry aspects of the two bus lines to
reference ground become more and more important. Thus in order to exploit the excellent emission
performance of the TJA1050, the matching tolerance between the split termination resistors at each ECU
has to be considered.
It is worth to notice that the EMC performance of the TJA1050 has been optimized for use of the split
termination without a choke. Hence, it is highly recommended to implement the split termination. The
excellent output stage symmetry allows going without chokes as shown by different emission
measurements. If, however, the EMC performance is still not sufficient, there will be the option to use
additional measures like capacitors and common mode chokes.
%CRCEKVQTUCV%#0*CPF%#0.
Matching capacitors (in pairs) at the CANH and CANL output to GND (C
and C
) are frequently used
to enhance immunity against electromagnetic interference. Along with the impedance of corresponding
noise sources (RF), capacitors at CANH and CANL to GND are forming a RC low-pass filter. Regarding
immunity the capacitor value should be as large as possible in order to achieve a low corner frequency. On
the other hand, the overall capacitive load and the impedance of the output stage establish a RC low-pass
filter for the data signals. Thus the associated corner frequency must be well above the data transmission
frequency. This results in a limit for the capacitor value depending on the number of nodes and the data
transmission frequency. Considering roughly 20
impedance for the output stage of the TJA1050 and a
bus system of 10 nodes at 500kbit/s, the capacitor value should not exceed 470pF. Notice that capacitors
are increasing the signal loop delay due to reducing rise and fall times.
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9
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+
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=
QR VH
=
QR VH
9
&&
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+BRQ
5
/BRQ
Figure 4.2 External capacitors forming RC low-pass filters
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TJA1050T 制造商:NXP Semiconductors 功能描述: 制造商:NXP Semiconductors 功能描述:LAN Transceiver, Single, 8 Pin, Plastic, SOP
TJA1050T/CM,118 功能描述:CAN 接口集成電路 RoHS:否 制造商:Texas Instruments 類型:Transceivers 工作電源電壓:5 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:SOIC-8 封裝:Tube
TJA1050T/H/V,112 功能描述:網(wǎng)絡(luò)控制器與處理器 IC CAN 1MBd Silent 5V 8-Pin RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
TJA1050T/H/V,118 功能描述:網(wǎng)絡(luò)控制器與處理器 IC CAN 1MBd Silent 5V 8-Pin RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
TJA1050T/N,112 功能描述:網(wǎng)絡(luò)控制器與處理器 IC HIGH SPEED CAN TRANSCEIVER RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray
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