LMX2492 Fractional-N PLL


TI's 500 MHz to 14 GHz wideband, low-noise fractional-N PLL with ramp/chirp generation

Texas Instruments' 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 an external amplifier, leading to a simpler solution with improved phase-noise performance.

Features
  • –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

LMX2492 Fractional N PLL

Manufacturer Part Number Description Available Quantity Datasheets
LMX2492RTWT IC HIGH FREQ PLL 24WQFN 469

Evaluation Board

Manufacturer Part Number Description Available Quantity Datasheets
LMX2492EVM EVAL BOARD PLL WITH VCO LMX2492 4