LMX2492 Fractional-N PLL

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

Image of Texas Instruments' LMX2492 Fractional-N PLLTexas 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.

  • -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

ImageManufacturer Part NumberDescriptionPLLAvailable Quantity
LMX2492RTWT datasheet linkIC HIGH FREQ PLL 24WQFNLMX2492RTWTIC HIGH FREQ PLL 24WQFNYes47 - Immediate
4750 - Factory Stock
LMX2492RTWT product page link

LMX2492 Evaluation Board

ImageManufacturer Part NumberDescriptionMain PurposeUtilized IC / PartAvailable Quantity
LMX2492EVM datasheet linkEVAL BOARD PLL WITH VCO LMX2492LMX2492EVMEVAL BOARD PLL WITH VCO LMX2492Timing, PLLLMX24926 - Immediate
11 - Factory Stock
LMX2492EVM product page link
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Published: 2014-07-22