Routing High-Speed JESD204B Lanes

The JESD204B standard, a high speed serial interface for data converters, supports a maximum speed of 12.5Gbps. ADCs and DACs now support several JESD204B lanes of data. The complexity of maintaining signal integrity can create a challenge for system engineers. In a JESD204B interface, the board channel will act as a low pass filter due to the capacitive effective of the PCB traces on the dielectric material of the board. Transmitter pre-emphasis and de-emphasis from a transmit output, coupled with receiver equalization can effectively boost the high frequency content at the end receiver. The result is nearly a flat frequency response through the transmission with a lower risk of bit errors across the link.