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LMX2572RHAR

TILMX2572RHAR

Texas Instruments
Frequency Synthesizer (RF) IC 6.4GHz 1 40-VFQFN Exposed Pad
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Overview

The LMX2572RHAR is a high-performance, ultra-low-power wideband fractional-N RF synthesizer with an integrated VCO capable of generating frequencies up to 6.4GHz. It features a 32-bit fractional divider and support for JESD204B, making it ideal for high-speed converter clocking and wireless infrastructure.

Why Choose This Part

This device offers best-in-class phase noise with a normalized floor of -232 dBc/Hz and very low current consumption of approximately 75mA in typical configurations. Its integrated LDOs simplify power supply design, while the 32-bit fractionality allows for extremely fine frequency resolution.

Applications

Wireless Infrastructure
Generating stable local oscillator signals for 5G, LTE, and small cell base stations.
JESD204B Clocking
Providing synchronized clock signals for high-speed data converters with sub-millidegree phase noise.
Frequency Modulated Continuous Wave (FMCW)
Utilizing integrated ramp and chirp functions for radar and sensing applications.
Test and Measurement
Serving as a low-noise signal source in portable handheld RF test equipment.

Key Specifications

PLL Yes with Bypass
Type Frequency Synthesizer (RF)
Input Clock
Mounting Type Surface Mount
Package / Case 40-VFQFN Exposed Pad
Frequency - Max 6.4GHz
Voltage - Supply 3V ~ 3.5V
Divider/Multiplier Yes/Yes
Number of Circuits 1
Ratio - Input:Output 1:2
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 40-VQFN (6x6)
Differential - Input:Output Yes/Yes

Getting Started

Designers can evaluate performance using the LMX2572EVM evaluation module and the TICS Pro software for register configuration. Ensure proper thermal grounding of the 40-VFQFN exposed pad and follow recommended loop filter topologies for optimal phase noise performance.

LMX2572 Family

Also available as: LMX2572RHAT

Also Consider

ADF4351 Analog Devices - A widely used alternative covering up to 4.4GHz with an integrated VCO for applications with lower frequency requirements.
MAX2870 Analog Devices / Maxim Integrated - Competitor part offering a similar 23.5MHz to 6GHz range with integrated VCO and fractional-N capabilities.