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LMX2491 Datasheet 6.4-GHz Low Noise RF PLL

Manufacturer: Texas Instruments

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General Description

The LMX2491 device is a low-noise, 6.4-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 LMX2491 supports a broad and flexible class of ramping capabilities, including FSK, PSK, and configurable piecewise linear FM modulation profiles of up to 8 segments.

Overview

Product Folder Order Now Technical Documents Tools & Software Support & Community LMX2491 SNAS711A – OCTOBER 2016 – REVISED JANUARY 2017 LMX2491 6.

Key Features

  • 1.
  • 227-dBc/Hz Normalized PLL Noise.
  • 500-MHz to 6.4-GHz Wideband PLL.
  • 3.15-V to 5.25-V Charge Pump PLL Supply.
  • Versatile Ramp / Chirp Generation.
  • 200-MHz Maximum Phase Detector Frequency.
  • FSK / PSK Modulation Pin.
  • Digital Lock Detect.
  • Single 3.3-V Supply Capability 2.

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