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Radiofrecuencia y microondas
PLL y sintetizadores de RF

LMX2571-EP

ACTIVO

Sintetizador de RF mejorado de 1.34 GHz, baja potencia y temperatura extrema con modulación FSK

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LMX2571-EP

ACTIVO
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Detalles del producto

Frequency (max) (MHz) 1344 Frequency (min) (MHz) 10 Normalized PLL phase noise (dBc/Hz) -231 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -124 Features FSK modulation, Integer-boundary spurs (IBS) suppression, Integrated VCO, Wideband Current consumption (mA) 39 Integrated VCO Yes Operating temperature range (°C) -55 to 125 Rating HiRel Enhanced Product Lock time (µs) (typ) (s) 140
Frequency (max) (MHz) 1344 Frequency (min) (MHz) 10 Normalized PLL phase noise (dBc/Hz) -231 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -124 Features FSK modulation, Integer-boundary spurs (IBS) suppression, Integrated VCO, Wideband Current consumption (mA) 39 Integrated VCO Yes Operating temperature range (°C) -55 to 125 Rating HiRel Enhanced Product Lock time (µs) (typ) (s) 140
VQFN (RHH) 36 36 mm² 6 x 6
  • VID#: V62/21613-01XE
  • -55 °C to +125 °C Operating Temperature
  • Any Frequency From 10 MHz to 1344 MHz
  • Low Phase Noise and Spurs
    • –123 dBc/Hz at 12.5-kHz Offset at 480 MHz
    • –145 dBc/Hz at 1-MHz Offset at 480 MHz
    • Normalized PLL Noise Floor of –231 dBc/Hz
    • Spurious Better Than –75 dBc/Hz
  • New FastLock to Reduce Lock Time
  • A Novel Technique to Remove Integer Boundary Spurs
  • Integrated 5-V Charge Pump and Output Divider for External VCO Operation
  • 2-, 4-, and 8-Level or Arbitrary Level Direct Digital FSK Modulation
  • One TX/RX Output or Two Fanout Outputs
  • Low Current Consumption
    • 39-mA Typical Synthesizer Mode (Internal VCO)
    • 9-mA Typical PLL Mode (External VCO)
  • 24-Bit Fractional-N Delta Sigma Modulator
  • Functional Differences between LMX2571 vs LMX2571-EP
    • LMX2571-EP has no TrCtl Pin
    • LMX2571-EP has no OSCin* pin, Differential Mode, or Crystal Mode
  • VID#: V62/21613-01XE
  • -55 °C to +125 °C Operating Temperature
  • Any Frequency From 10 MHz to 1344 MHz
  • Low Phase Noise and Spurs
    • –123 dBc/Hz at 12.5-kHz Offset at 480 MHz
    • –145 dBc/Hz at 1-MHz Offset at 480 MHz
    • Normalized PLL Noise Floor of –231 dBc/Hz
    • Spurious Better Than –75 dBc/Hz
  • New FastLock to Reduce Lock Time
  • A Novel Technique to Remove Integer Boundary Spurs
  • Integrated 5-V Charge Pump and Output Divider for External VCO Operation
  • 2-, 4-, and 8-Level or Arbitrary Level Direct Digital FSK Modulation
  • One TX/RX Output or Two Fanout Outputs
  • Low Current Consumption
    • 39-mA Typical Synthesizer Mode (Internal VCO)
    • 9-mA Typical PLL Mode (External VCO)
  • 24-Bit Fractional-N Delta Sigma Modulator
  • Functional Differences between LMX2571 vs LMX2571-EP
    • LMX2571-EP has no TrCtl Pin
    • LMX2571-EP has no OSCin* pin, Differential Mode, or Crystal Mode

The LMX2571-EP device is a low-power, high-performance, wideband PLLatinum™ RF synthesizer that integrates a delta-sigma fractional N PLL, multiple core voltage-controlled oscillator (VCO), programmable output dividers and two output buffers. The VCO cores work up to 5.376 GHz resulting in continuous output frequency range of 10 MHz to 1344 MHz.

This synthesizer can also be used with an external VCO. To that end, a dedicated 5-V charge pump and an output divider are available for this configuration.

A unique programmable multiplier is also incorporated to help improve spurs, allowing the system to use every channel even if it falls on an integer boundary.

The output has an integrated SPDT switch that can be used as a transmit and receive switch in FDD radio application. Both outputs can also be turned on to provide 2 outputs at the same time.

The LMX2571-EP supports direct digital FSK modulation through programming or pins. Discrete level FSK, pulse shaping FSK, and analog FM modulation are supported.

A new FastLock technique can be used allowing the user to step from one frequency to the next in less than 1.5 ms even when an external VCO is used with a narrow band loop filter.

The LMX2571-EP device is a low-power, high-performance, wideband PLLatinum™ RF synthesizer that integrates a delta-sigma fractional N PLL, multiple core voltage-controlled oscillator (VCO), programmable output dividers and two output buffers. The VCO cores work up to 5.376 GHz resulting in continuous output frequency range of 10 MHz to 1344 MHz.

This synthesizer can also be used with an external VCO. To that end, a dedicated 5-V charge pump and an output divider are available for this configuration.

A unique programmable multiplier is also incorporated to help improve spurs, allowing the system to use every channel even if it falls on an integer boundary.

The output has an integrated SPDT switch that can be used as a transmit and receive switch in FDD radio application. Both outputs can also be turned on to provide 2 outputs at the same time.

The LMX2571-EP supports direct digital FSK modulation through programming or pins. Discrete level FSK, pulse shaping FSK, and analog FM modulation are supported.

A new FastLock technique can be used allowing the user to step from one frequency to the next in less than 1.5 ms even when an external VCO is used with a narrow band loop filter.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet LMX2571-EP Low-Power, High-Performance PLLatinum RF Synthesizer With FSK Modulation datasheet (Rev. B) PDF | HTML 01 jun 2022
Application note Practical Clocking Considerations That Give Your Next High-Speed Converter Design an Edge (Rev. A) PDF | HTML 11 abr 2025
Application brief Compilation of RF Synthesizer Resources PDF | HTML 22 oct 2024
Technical article How to implement FM modulation PDF | HTML 03 ago 2017
Application note Frequency Shift Keying with LMX2571 30 may 2017
Application note LMX2571 Using a Programmable Input Multiplier to Minimize Integer Boundary Spurs 12 ene 2016
Technical article Timing is Everything: Improving integer boundary spurs in fractional PLL synthesiz PDF | HTML 05 ago 2015

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Soporte de software

TICSPRO-SW — TICS Pro GUI and Live Programming Tool for Clocking Devices

Texas Instruments clocks and synthesizers (TICS) pro software is used to program the evaluation modules (EVMs) for product numbers with these prefixes: CDC, LMK and LMX. These products include phase-locked loops and voltage-controlled oscillators (PLL+VCO), synthesizers and clocking devices.

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Herramienta de diseño

PLLATINUMSIM-SW — PLL loop filter, phase noise, lock time, and spur simulation tool

PLLATINUMSIM-SW is a simulation tool that allows users to create detailed designs and simulations of our PLLatinum™ integrated circuits, which include the LMX series of phase-locked loops (PLLs) and synthesizers.

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Productos y hardware compatibles
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Pedidos y calidad

Información incluida:
  • RoHS
  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL)/reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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Soporte y capacitación

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