Clock jitter attenuators/frequency synthesisers uprate performance

October 02, 2015 // By Graham Prophet
IDT has added low phase noise devices to its offering supporting JESD204B-compliant RF timing and other high-performance applications

These jitter attenuator and frequency synthesiser devices offer ultra-high performance meeting the phase noise requirements of the most stringent applications, including JESD204B-compliant RF timing. The 8V19N407 and 8V19N408 support up to 3 GHz output frequencies, as well as 82 femtoseconds of RMS phase noise, addressing the requirements of multi-carrier GSM radio transceivers as well as 40 and 100 Gb Ethernet PHYs and other high-performance applications.

The 8V19N407 and 8V19N408 generate clock and SYSREF signals for JESD204B subclass 1-compliant ADC/DAC converters in wireless, industrial and radar applications. These devices output multiple high-performance synchronised clocks that are also suitable for high-speed Ethernet and cable TV head-end applications.

The devices offer a wide output frequency range from 25 MHz to 3000 MHz and LVDS and LVPECL outputs with adjustable amplitudes. The 8V19N407 supports Ethernet frequencies, making it suitable for timing 40G and 100G Ethernet PHYs while the 8V19N408 includes dual voltage-controlled oscillators (VCOs) offering frequency plan flexibility.

For wireless communications, the devices enable compliance with GSM phase noise and blocker specifications without external filters. For 40/100 GbE PHYs, the 8V19N407 and 8V19N408 generate low phase-noise clocks that reduce bit error rates and achieve reliable transmission. The company adds that these highly integrated devices replace multiple VCOs and discrete components for applications requiring best-in-class phase-noise performance.

The 8V19N407 and 8V19N408 jitter attenuator and frequency synthesiser products come in a 10 x 10 mm 72-VFQFN package. A video is here.