Product details

Integrated VCO Yes Output frequency (Min) (MHz) 28 Output frequency (Max) (MHz) 6400 Normalized PLL phase noise (dBc/Hz) -232 Current consumption (mA) 75 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -124
Integrated VCO Yes Output frequency (Min) (MHz) 28 Output frequency (Max) (MHz) 6400 Normalized PLL phase noise (dBc/Hz) -232 Current consumption (mA) 75 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -124
VQFN (RHA) 40 36 mm² 6 x 6
  • Output frequency: 12.5 MHz to 6.4 GHz
  • Low power consumption: 75 mA at 3.3-V supply
  • –106-dBc/Hz Phase noise at 100-kHz offset with 6.4-GHz carrier
  • PLL figure of merit: –232 dBc/Hz
  • PLL normalized 1/f noise: –123.5 dBc/Hz
  • 32-Bit Fractional-N divider
  • Remove integer boundary spurs with programmable input multiplier
  • Synchronization of output phase across multiple devices
  • Support for JESD204B SYSREF with programmable delay
  • Support for ramp and chirp functions
  • Support for FSK direct digital modulation
  • Two programmable output power level differential outputs
  • Fast VCO calibration speed: < 20 µs
  • Single 3-V to 3.5-V power supply
  • Output frequency: 12.5 MHz to 6.4 GHz
  • Low power consumption: 75 mA at 3.3-V supply
  • –106-dBc/Hz Phase noise at 100-kHz offset with 6.4-GHz carrier
  • PLL figure of merit: –232 dBc/Hz
  • PLL normalized 1/f noise: –123.5 dBc/Hz
  • 32-Bit Fractional-N divider
  • Remove integer boundary spurs with programmable input multiplier
  • Synchronization of output phase across multiple devices
  • Support for JESD204B SYSREF with programmable delay
  • Support for ramp and chirp functions
  • Support for FSK direct digital modulation
  • Two programmable output power level differential outputs
  • Fast VCO calibration speed: < 20 µs
  • Single 3-V to 3.5-V power supply

The LMX2572 is a low-power, high-performance wideband synthesizer that can generate any frequency from 12.5 MHz to 6.4 GHz without using an internal doubler. The PLL delivers excellent performance while consuming just 75 mA from a single 3.3-V supply.

For applications like digital mobile radio (DMR) and wireless microphones, the LMX2572 supports FSK modulation. Discrete level FSK and pulse-shaping FSK are supported. Direct digital FSK modulation is achievable through programming or pins.

The LMX2572 allows users to synchronize the output of multiple devices and also enables applications that need deterministic delay between input and output. The LMX2572 provides an option to adjust the phase with fine granularity to account for delay mismatch on the board or within devices. A frequency ramp generator can synthesize up to two segments of ramp in an automatic ramp generation option or a manual option for maximum flexibility. The fast calibration algorithm allows the user to change frequencies faster than 20 µs. The LMX2572 also supports generating or repeating SYSREF (compliant to JESD204B standard) making it an ideal low-power, low-noise clock source for clocking high-speed data converters. Fine delay adjustment is provided in this configuration to account for delay differences of board traces.

The LMX2572 integrates LDOs from a single 3.3-V supply, thus eliminating the need for onboard low-noise LDOs.

The LMX2572 is a low-power, high-performance wideband synthesizer that can generate any frequency from 12.5 MHz to 6.4 GHz without using an internal doubler. The PLL delivers excellent performance while consuming just 75 mA from a single 3.3-V supply.

For applications like digital mobile radio (DMR) and wireless microphones, the LMX2572 supports FSK modulation. Discrete level FSK and pulse-shaping FSK are supported. Direct digital FSK modulation is achievable through programming or pins.

The LMX2572 allows users to synchronize the output of multiple devices and also enables applications that need deterministic delay between input and output. The LMX2572 provides an option to adjust the phase with fine granularity to account for delay mismatch on the board or within devices. A frequency ramp generator can synthesize up to two segments of ramp in an automatic ramp generation option or a manual option for maximum flexibility. The fast calibration algorithm allows the user to change frequencies faster than 20 µs. The LMX2572 also supports generating or repeating SYSREF (compliant to JESD204B standard) making it an ideal low-power, low-noise clock source for clocking high-speed data converters. Fine delay adjustment is provided in this configuration to account for delay differences of board traces.

The LMX2572 integrates LDOs from a single 3.3-V supply, thus eliminating the need for onboard low-noise LDOs.

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Technical documentation

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Type Title Date
* Data sheet LMX2572 6.4-GHz Low power wideband RF synthesizer with phase synchronization and JESD204B support datasheet (Rev. B) 29 Jan 2019
User guide LMX2572EVM Evaluation Instructions (Rev. B) 19 Jul 2019
Application note Achieving Low Frequency Switchover Time for Wireless Infrastructure Applications 28 Nov 2018
Application note LMX2571 Using a Programmable Input Multiplier to Minimize Integer Boundary Spurs 12 Jan 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LMX2572EVM — 6.4-GHz Low Power Wideband RF Synthesizer with Phase Synchronization and JESD204B Support

This Evaluation Module is for the LMX2572, which is a low-power high-performance wideband synthesizer that can generate any frequency from 13 MHz to 6.4 GHz without using an internal doubler. The PLL delivers excellent performance while consuming just 75 mA from a single 3.3-V supply. This device (...)
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Application software & framework

PLLATINUMSIM-SW — Texas Instruments PLLatinum Simulator Tool

The PLLATINUMSIM-SW simulator tool lets you create detailed designs and simulations of our PLLATINUM™ integrated circuits which include the LMX series of PLLs and synthesizers.
Application software & framework

TICSPRO-SW — Texas Instruments Clocks and Synthesizers (TICS) Pro Software

The TICS Pro software is used to program the evaluation modules (EVMs) for device numbers with these prefixes: CDC, LMK and LMX. These devices include PLLs and voltage-controlled oscillators (PLL+VCO), synthesizers and clocking devices.
Simulation model

LMX2572 IBIS Model

SNAM224.ZIP (41 KB) - IBIS Model
Design tool

CLOCK-TREE-ARCHITECT — Clock tree architect programming software

Clock tree architect is a clock tree synthesis tool that streamlines your design process by generating clock tree solutions based on your system requirements. The tool pulls data from an extensive database of clocking products to generate a system-level multi-chip clocking solution.
CAD/CAE symbol

LMX25xx Reference Pro Altium Database

SNAR037.ZIP (899 KB)
Package Pins Download
VQFN (RHA) 40 View options

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