Chuantu microelectronics ca-if1051 can-fd transceiver

01 Product overview

This kind of CAN Transceivers are designed for high speed CAN Design for application , All devices support classic CAN and 5Mbps CAN FD, Under load CAN Faster data rates can be achieved in the network . The device has a silent mode , Common mode input voltage can reach ±30 V, among “H” Suffix model bus fault protection up to ±70V, Not “H” The suffix model bus fault protection is ±58V. The device contains many protection functions , To improve the device and CAN The stability of . At present SOIC8 Package size .

CA-IF1051 CAN Transceiver selection table

Item number	Whether it has level conversion function	Communications Pattern	rate （Mbps）	Common mode input voltage （V）	Bus fault protection (V )	HBM  ESD Other pins （±KV）	HBM  ESD Bus pin （±KV）	Operating voltage range (V)	Temperature range (℃）	Package form
CA-IF1051HS	no	Half duplex	5	-30~30	-70~70	4	6	4.5~5.5	-55~125	SOIC8
CA-IF1051S	no	Half duplex	5	-30~30	-58~58	4	8	4.5~5.5	-55~125	SOIC8

All data are only for reference during preliminary model selection , Please refer to the product manual for formal model selection .

02 Logic side application features

CA-IF1051 Of TXD The pin is receiving CAN Controller TTL Peacetime , Greater than 2V The level of will be recognized as high , Less than 0.8V The level of will be recognized as low level ;RXD The output high level of the pin is greater than 4V, The low level is less than 0.4V, accord with CAN Controller level standard .

03 Bus side differential output voltage

Due to the presence of current and resistance on the bus , The differential level will be attenuated after long line transmission , The higher the differential output level, the better , The greater the pressure difference, the easier it is to identify the receiving end ; But if the difference level is too large , It will cause excessive current flowing through the matching resistance , Cause unnecessary power consumption , The electromagnetic interference of a single device will also be strengthened .

 

So on the whole , Appropriate bus differential output voltage can be compatible with power consumption and transmission distance , The output voltage is too high , This will lead to an increase in power consumption , But the transmission distance can be longer , Low output voltage , Reduced power consumption , The electromagnetic interference of single equipment is also reduced , But it will also lead to shorter transmission distance .CA-IF1051S The differential output voltage meets ISO11898-2 standard .

 

04 Explicit timeout protection

The explicit timeout protection function is mainly used to prevent CAN Bus network due to hardware or software failure TXD Be in for a long time “0” Level state .TXD keep “0” Level means CAN The network is dominant level , All nodes of the whole network cannot send and receive data ,CA-IF1051S Avoid this on the bus through the hardware timing of the transceiver .

 

05 High common mode voltage input range

as everyone knows , If CAN The bus input voltage common mode range of the transceiver chip is not enough , Will have an impact on communication , Chuantu microelectronics CA-IF1051S The common mode voltage input range is achieved ±30V, So that it can be applied to the worse industrial environment .

06 Timing characteristics

In practice CAN In communication , There will be continuous 5bit Clock not synchronized , The accumulated error reaches the maximum , In this case , The whole system is looking forward to CAN The transceiver can control the error to be small enough , To ensure the integrity of the transmission signal . The test waveform simulating this condition is shown in the figure below , Chuantu microelectronics CA-IF1051S The test data is in accordance with the specifications , Ensure that in this case , The signal waveform at the receiving end will not cause sampling errors due to large deformation .

 

07 Typical applications

The following figure is the application block diagram of stepping motor controller , utilize STM32 Single chip microcomputer CAN The controller carries out CAN Bus communication .

 

Single chip microcomputer STM32F103C8T6 Bring their own USB The interface can communicate with the upper computer , With two SPI Interface , One of them SPI The interface is used to read the data of the sensor , the other one SPI Interface selection OLED; Single chip computer through IO To control the motor drive chip ; And then through SPI Interface , Read back the sensor data ; SCM also comes with one CAN Protocol interfaces , This interface can output TTL level , adopt CA-IF1051S Transceiver chip , Connect to CAN On the bus , And others CAN Node communication ; If it is a harsh industrial environment, an isolator can be used to isolate the signal , Consider Sichuan earth microelectronics CA-IS36XX Digital Isolator series with isolated power supply .