The LMX2595 high-performance, wideband synthesizer that can generate any frequency from
10 MHz to 19 GHz. An integrated doubler is used for frequencies above 15 GHz. 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 LMX2595 allows users to synchronize the output of multiple devices and also enables
applications that need deterministic delay between input and output. A frequency ramp generator can
synthesize up to 2 segments of ramp in an automatic ramp generation option or a manual option for
maximum flexibility. The fast calibration algorithm allows changing frequencies faster than 20 µs.
The LMX2595 adds support for generating or repeating SYSREF (compliant to JESD204B standard) making
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 LMX2595 deliver output power as high as 7 dBm at 15-GHz carrier
frequency. The device runs from a single 3.3-V supply and has integrated LDOs that eliminate the
need for on-board low noise LDOs.
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