LMX2492

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LMX2492, LMX2492-Q1 SNAS624B – MARCH 2014 – REVISED MAY 2015 LMX2492/LMX2492-Q1 14 GHz Low Noise Fractional N PLL with Ramp/Chirp Generation 1 Features 1 -227 dBc/Hz Normalized PLL Noise 500 MHz - 14 GHz Wideband PLL 3.15 - 5.25 V Charge Pump PLL Supply Versatile Ramp / Chirp Generation 200 MHz Max Phase Detector Frequency FSK / PSK Modulation Pin Digital Lock Detect Single 3.3 V Supply Capability Automotive 125°C Q100 Grade 1 Qualification Non-Automotive (LMX2492) Option 2 Applications Automotive FMCW Radar Military Radar Microwave Backhaul Test and Measurement Satellite Communications Wireless Infrastructure Sampling Clock for High Speed ADC/DAC 3 Description The LMX2492/92-Q1 is a low noise 14 GHz wideband delta-sigma fractional N PLL with ramp and chirp generation. It consists of a phase frequency detector, programmable charge pump, and high frequency input for the external VCO. The LMX2492/92-Q1 supports a broad and flexible class of ramping capabilities, including FSK, PSK, and configurable piecewise linear FM modulation profiles of up to 8 segments. It supports fine PLL resolution and fast ramp with up to a 200 MHz phase detector rate. The LMX2492/92-Q1 allows any of its registers to be read back. The LMX2492/92-Q1 can operate with a single 3.3 V supply. Moreover, supporting up to 5.25 V charge pump can eliminate the need of external amplifier, l...