The DCAN500 receives and transmits CAN2.0 A/B protocol messages.
The arbitration over the power line is based on the CAN message Identifier’s LSB 11 bits. The data is error protected;
QPSK modulated using a low voltage narrow-band carrier, eliminating the EMC generated by the “square wave” of the normal CAN bits. The DCAN500 is implemented in a small CMOS digital process allowing integration with other CMOS IPs such as micro-controllers. The DCAN500 is coupled to the DC line via a capacitor, thus, there is no need for a high voltage process such as needed by ordinary CAN transceivers.
This innovative solution allows low-cost overall CAN implementation, combining power and data over the same cable, withstanding the hostile DC lines impulse noises eliminating twisted pair wires, saving weight, and simplifies installation.