LMX2492-Q1 500MHz to 14GHz Wideband, Low Noise Fractional N PLL With Ramp/Chirp Generation | TI.com

LMX2492-Q1 (ACTIVE)

500MHz to 14GHz Wideband, Low Noise Fractional N PLL With Ramp/Chirp Generation

 

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, 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

Parametrics

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Part number Order Output frequency (Min) (MHz) Output frequency (Max) (MHz) Normalized PLL phase noise (dBc/Hz) 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) Current consumption (mA) VCC (V) Integrated VCO
LMX2492-Q1 Order now 500     14000     -227     -120     60     3.15 to 3.45     No    
LMX2485Q-Q1 Order now 500     3100     -210     -104     5     2.5 to 3.6     No