Industry Expert Blogs

Can your PCB handle speed up to 12.5Gbps, surprised, right? The JESD204B standard provides bit rates up to 12.5Gbps for serial interfaces. This upgrade allows designers to use fewer transceivers on FPGA/ASIC thereby reducing the I/O count and packaging size. The new standard is being adopted rapidly in high-speed data converter applications such as wireless infrastructure transceivers, software defined radios, medical imaging systems, and radar and secure communications.

Going back 10 years, designers were using the traditional single ended CMOS interface that limited the speed to about 200Mbps. Then came differential LVDS with improved noise coupling on signal lines and power supplies. The limitation of this interface was higher power consumption at lower sampling speeds. This gave the CMOS interface a reason for existence, and it is still being used today. With evolution of faster ADC’s, there was a need of more power-efficient digital interface than parallel LVDS, this urge gave birth to JESD204, high-speed serial link connecting single or multiple data converters to a digital logic device with data rates up to 3.125 Gbps for JESD204A and 12.5Gbps for JESD204B.

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