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Part Number: SN65HVDA1040A-Q1
We are using SN65HVDA1040A-Q1 with maximum data rate of 1Mbps. At bus terminals(CANH, CANL) we are using SMAJ24CA-E3 TVS diodes for protection. This diode have maximum clamping voltage of 39.8 V and Junction Capacitance above 2000pF to 3000pF.
1. The CAN Driver support maximum -27 V to 40 V Voltage on bus terminals(CANH, CANL). So is there any problem in negative transient as maximum voltage is -27 V and clamping voltage is -39.8V.
2. The CAN driver is operating at 1Mbps, Is there any problem due to diode Junction Capacitance (2000pF to 3000pF).
3. Also let me know typical Capacitor value in Split Termination
Is there a particular reason the SN65HVDA1040A-Q1 was chosen? The TCAN1042-Q1 has the same pinout (minus the SPLIT pin, which isn't necessary for the TCAN1042), higher absolute maximum ratings on the CAN bus pins, higher ESD protection, and several other benefits.
Also, if you wanted to look into a TVS diode that had the same clamping voltage but lower capacitance, PESD1CAN is typically recommended.
Texas Instruments | INT-TRX| Applications Engineer
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In reply to Eric Hackett:
Thank you Eric for replay.
Yes it is 250pF to 300pF. I will check possibility TCAN1042-Q1 and PESD1CAN.
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