TIDUDA6A December 2017 – January 2022
The LMX2594 is a high-performance, wideband PLL with integrated VCOs that can generate frequency from 10 MHz to 15 GHz without using an internal doubler. The high-performance PLL with figure of merit of –236 dBc/Hz and high-phase detector frequency can attain very-low in-band noise and integrated jitter. The high-speed N-divider has no pre-divider, thus significantly reducing the amplitude and number of spurs. There is also a programmable input multiplier to mitigate integer boundary spurs. The LMX2594 adds support for generating or repeating SYSREF (compliant to JESD204B standard), which make it an ideal low-noise clock source for high-speed data converters. Fine delay adjustment (9-ps resolution) is provided in this configuration to account for delay differences of board traces. The output drivers within the LMX2594 delivers output power as high as 7 dBm at a 15-GHz carrier frequency. The device runs from a single 3.3-V supply and has integrated LDOs that eliminate the requirement for onboard, low-noise LDOs.