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PLL y sintetizadores de RF

LMX2541

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Sintetizador de frecuencia PLLatinum de ruido ultrabajo con VCO integrado

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LMX2541

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Detalles del producto

Frequency (max) (MHz) 4000 Frequency (min) (MHz) 32 Normalized PLL phase noise (dBc/Hz) -226 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -125 Features Integrated VCO Current consumption (mA) 120 Integrated VCO Yes Operating temperature range (°C) -40 to 85 Rating Catalog Lock time (µs) (typ) (s) 80
Frequency (max) (MHz) 4000 Frequency (min) (MHz) 32 Normalized PLL phase noise (dBc/Hz) -226 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -125 Features Integrated VCO Current consumption (mA) 120 Integrated VCO Yes Operating temperature range (°C) -40 to 85 Rating Catalog Lock time (µs) (typ) (s) 80
WQFN (NJK) 36 36 mm² 6 x 6
  • Multiple Frequency Options Available
    (See Device Comparison Table)
  • Frequencies from 31.6 MHz to 4000 MHz
  • Very Low RMS Noise and Spurs
  • –225 dBc/Hz Normalized PLL Phase Noise
  • Integrated RMS Noise (100 Hz – 20 MHz)
    • 2 mRad (100 Hz – 20 MHz) at 2.1 GHz
    • 3.5 mRad (100 Hz - 20 MHz) at 3.5 GHz
  • Ultra Low-Noise Integrated VCO
  • External VCO Option (Internal VCO Bypassed)
  • VCO Frequency Divider 1 to 63 (all values)
  • Programmable Output Power
  • Up to 104-MHz Phase Detector Frequency
  • Integrated Low-Noise LDOs
  • Programmable Charge Pump Output
  • Partially Integrated Loop Filter
  • Digital Frequency Shift Keying (FSK) Modulation Pin
  • Integrated Reference Crystal Oscillator Circuit
  • Hardware and Software Power Down
  • FastLock Mode and VCO-Based Cycle Slip Reduction
  • Analog and Digital Lock Detect
  • 1.6-V Logic Compatibility
  • Multiple Frequency Options Available
    (See Device Comparison Table)
  • Frequencies from 31.6 MHz to 4000 MHz
  • Very Low RMS Noise and Spurs
  • –225 dBc/Hz Normalized PLL Phase Noise
  • Integrated RMS Noise (100 Hz – 20 MHz)
    • 2 mRad (100 Hz – 20 MHz) at 2.1 GHz
    • 3.5 mRad (100 Hz - 20 MHz) at 3.5 GHz
  • Ultra Low-Noise Integrated VCO
  • External VCO Option (Internal VCO Bypassed)
  • VCO Frequency Divider 1 to 63 (all values)
  • Programmable Output Power
  • Up to 104-MHz Phase Detector Frequency
  • Integrated Low-Noise LDOs
  • Programmable Charge Pump Output
  • Partially Integrated Loop Filter
  • Digital Frequency Shift Keying (FSK) Modulation Pin
  • Integrated Reference Crystal Oscillator Circuit
  • Hardware and Software Power Down
  • FastLock Mode and VCO-Based Cycle Slip Reduction
  • Analog and Digital Lock Detect
  • 1.6-V Logic Compatibility

The LMX2541 is an ultra low-noise frequency synthesizer which integrates a high performance delta-sigma fractional N PLL, a VCO with fully integrated tank circuit, and an optional frequency divider. The PLL offers an unprecedented normalized noise floor of -225 dBc/Hz and can be operated with up to 104 MHz of phase-detector rate (comparison frequency) in both integer and fractional modes. The PLL can also be configured to work with an external VCO.

The LMX2541 integrates several low-noise, high precision LDOs and output driver matching network to provide higher supply noise immunity and more consistent performance, while reducing the number of external components. When combined with a high quality reference oscillator, the LMX2541 generates a very stable, ultra low-noise signal.

The LMX2541 is offered in a family of 6 devices with varying VCO frequency range from 1990 MHz up to 4 GHz. Using a flexible divider, the LMX2541 can generate frequencies as low as 31.6 MHz.

The LMX2541 is a monolithic integrated circuit, fabricated in a proprietary BiCMOS process. Device programming is facilitated using a three-wire MICROWIRE interface that can operate down to 1.6 volts. Supply voltage ranges from 3.15 V to 3.45 V. The LMX2541 is available in a 36-pin 6-mm × 6-mm × 0.8-mm WQFN Package.

The LMX2541 is an ultra low-noise frequency synthesizer which integrates a high performance delta-sigma fractional N PLL, a VCO with fully integrated tank circuit, and an optional frequency divider. The PLL offers an unprecedented normalized noise floor of -225 dBc/Hz and can be operated with up to 104 MHz of phase-detector rate (comparison frequency) in both integer and fractional modes. The PLL can also be configured to work with an external VCO.

The LMX2541 integrates several low-noise, high precision LDOs and output driver matching network to provide higher supply noise immunity and more consistent performance, while reducing the number of external components. When combined with a high quality reference oscillator, the LMX2541 generates a very stable, ultra low-noise signal.

The LMX2541 is offered in a family of 6 devices with varying VCO frequency range from 1990 MHz up to 4 GHz. Using a flexible divider, the LMX2541 can generate frequencies as low as 31.6 MHz.

The LMX2541 is a monolithic integrated circuit, fabricated in a proprietary BiCMOS process. Device programming is facilitated using a three-wire MICROWIRE interface that can operate down to 1.6 volts. Supply voltage ranges from 3.15 V to 3.45 V. The LMX2541 is available in a 36-pin 6-mm × 6-mm × 0.8-mm WQFN Package.
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Documentación técnica

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* Data sheet LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizer With Integrated VCO datasheet (Rev. J) PDF | HTML 31 dic 2014

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.

Placa de evaluación

LMX25412690EVAL — Placa de evaluación LMX25412690

The LMX2541 Evaluation Board simplifies the evaluation of the LMX2541 device. There is a different evaluation board for each option of the LMX2541 device, but they all use the same instructions and software.

Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

LMX25413030EVAL — Placa de evaluación LMX25413030

The LMX2541 Evaluation Board simplifies the evaluation of the LMX2541 device. There is a different evaluation board for each option of the LMX2541 device, but they all use the same instructions and software.

Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

LMX25413320EVAL — Placa de evaluación LMX25413320

The LMX2541 Evaluation Board simplifies the evaluation of the LMX2541 device. There is a different evaluation board for each option of the LMX2541 device, but they all use the same instructions and software.

Guía del usuario: PDF
No disponible en TI.com
Herramienta de programación de software

CODELOADER — CodeLoader Device Register Programming v4.19.0

The CodeLoader 4 software is used to program the LMX PLLs and LMK timing devices through either the USB or line print terminal (LPT) port of a computer. This software also provides information on how to program the device by showing the bits that are actually sent.

Which software do I use?

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Productos y hardware compatibles

Productos y hardware compatibles
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Soporte de software

CLOCKDESIGNTOOL — Clock Design Tool Software

The Clock Design Tool software helps with part selection, loop filter design and simulation of timing device solutions. When you enter desired output frequencies and a reference frequency (optional), the tool provides TI devices to meet the specified requirements, divider values and a recommended (...)

Productos y hardware compatibles

Productos y hardware compatibles
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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.

Productos y hardware compatibles

Productos y hardware compatibles
Opciones de descarga
Modelo de simulación

LMX2541 IBIS Model

SNOM472.ZIP (40 KB) - IBIS Model
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Herramienta de diseño

CLOCK-TREE-ARCHITECT — Software de programación de diseño de árbol de reloj

La herramienta de síntesis de tipo árbol de reloj “arquitecto de tipo árbol de reloj” agiliza el proceso de diseño al generar soluciones de árbol de reloj en función de los requisitos del sistema. La herramienta extrae datos de una amplia base de datos de productos de relojes para generar una (...)
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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.

Productos y hardware compatibles

Productos y hardware compatibles
Opciones de descarga
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
WQFN (NJK) 36 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

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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