TI's new PLL enables better RF sensitivity and radar accuracy - Embedded.com

TI’s new PLL enables better RF sensitivity and radar accuracy

Texas Instruments has introduced what the company claims is the industry's highest-performance 14-GHz fractional-N PLLatinum phased-locked loop (PLL) with advanced frequency modulation. The LMX2492 offers noise performance 6 dB better than the nearest competitor for improved radio frequency (RF) sensitivity and radar range and accuracy. The device also supports a 200-MHz phase frequency detector, a 5-V charge pump supply and a wide operating frequency range of 500 MHz to 14 GHz. The LMX2492 is offered in industrial and automotive grade (class 1) for military and automotive radar, microwave backhaul, communications, and test and measurement applications.

The LMX2492 is part of TI's growing portfolio of high-performance clock and timing products offering the industry's highest performance. TI's clock & timing portfolio is also supported by the new WEBENCH Clock Architect to help reduce time-to-market.

Key features

  • Phase detector frequency of 200 MHz and low PLL phase noise of -227 dBc/Hz provides RF front ends with a low-noise local oscillator for enhanced receiver sensitivity.
  • Flexible frequency and phase modulation, including frequency shift keying (FSK), phase shift keying (PSK) and configurable piecewise linear FM modulation, increases radar detection range, accuracy and immunity to interference.
  • An integrated flexible Fractional-N engine with a 5-V charge pump supply and low-noise and high-precision low dropout regulators (LDOs) allow designers to eliminate external components and simplify the system complexity enabling faster time to market.

The LMX2492 produces an enhanced local oscillator to improve receiver sensitivity and transmitter spectral purity when paired with the LMK04828, the industry's highest-performance clock jitter cleaner, or the LMK03806, a low-jitter, multi-rate clock generator.

More information, order samples and an evaluation module (EVM)

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