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Radiofrecuencia y microondas
PLL y sintetizadores de RF

LMX2470

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PLL de N fraccionarios delta sigma de 2,6 GHz con PLL de N enteros de 800 MHz

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LMX2470

ACTIVO
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Detalles del producto

Frequency (max) (MHz) 2600 Frequency (min) (MHz) 500 Normalized PLL phase noise (dBc/Hz) -210 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -104 Features Cycle slip reduction, Delta-sigma modulation, Dual PLL, Fastlock, Integrated timeout counter, On-chip input frequency doubler Current consumption (mA) 3.9 Integrated VCO No Operating temperature range (°C) -40 to 85 Rating Catalog Lock time (µs) (typ) (s) Loop BW dependent
Frequency (max) (MHz) 2600 Frequency (min) (MHz) 500 Normalized PLL phase noise (dBc/Hz) -210 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -104 Features Cycle slip reduction, Delta-sigma modulation, Dual PLL, Fastlock, Integrated timeout counter, On-chip input frequency doubler Current consumption (mA) 3.9 Integrated VCO No Operating temperature range (°C) -40 to 85 Rating Catalog Lock time (µs) (typ) (s) Loop BW dependent
ULGA (NPF) 24 15.75 mm² (3.5 mm × 4.5 mm)
  • Low In-Band Phase Noise and Low Fractional Spurs
  • 12 Bit or 22 Bit Selectable Fractional Modulus
  • Up to 4th Order Programmable Delta-Sigma Modulator
  • Enhanced Anti-Cycle Slip Fastlock Circuitry
    • Fastlock
    • Cycle Slip Reduction
    • Integrated Timeout Counters
  • Digital Lock Detect Output
  • Prescalers Allow Wide Range of N Values
    • RF PLL: 16/17/20/21
    • IF PLL: 8/9 or 16/17
  • Crystal Reference Frequency up to 110 MHz
  • On-chip Crystal Reference Frequency Doubler.
  • Phase Comparison Frequency up to 30 MHz
  • Hardware and Software Power-down Control
  • Ultra Low Consumption: ICC = 4.1 mA (Typical)

All trademarks are the property of their respective owners.

  • Low In-Band Phase Noise and Low Fractional Spurs
  • 12 Bit or 22 Bit Selectable Fractional Modulus
  • Up to 4th Order Programmable Delta-Sigma Modulator
  • Enhanced Anti-Cycle Slip Fastlock Circuitry
    • Fastlock
    • Cycle Slip Reduction
    • Integrated Timeout Counters
  • Digital Lock Detect Output
  • Prescalers Allow Wide Range of N Values
    • RF PLL: 16/17/20/21
    • IF PLL: 8/9 or 16/17
  • Crystal Reference Frequency up to 110 MHz
  • On-chip Crystal Reference Frequency Doubler.
  • Phase Comparison Frequency up to 30 MHz
  • Hardware and Software Power-down Control
  • Ultra Low Consumption: ICC = 4.1 mA (Typical)

All trademarks are the property of their respective owners.

The LMX2470 is a low power, high performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL. The device is fabricated using TI’s advanced BiCMOS process.

With delta-sigma architecture, fractional spur compensation is achieved with noise shaping capability of the delta-sigma modulator and the inherent low pass filtering of the PLL loop filter. Fractional spurs at lower frequencies are pushed to higher frequencies outside the loop bandwidth. Unlike analog compensation, the digital feedback techniques used in the LMX2470 are highly resistant to changes in temperature and variations in wafer processing. With delta-sigma architecture, the ability to push close in spur and phase noise energy to higher frequencies is a direct function of the modulator order. The higher the order, the more this energy can be spread to higher frequencies. The LMX2470 has a programmable modulator up to order four, which allows the designer to select the optimum modulator order to fit the phase noise, spur, and lock time requirements of the system.

Programming is fast and simple. Serial data is transferred into the LMX2470 via a three line MICROWIRE interface (Data, Clock, Load Enable). Nominal supply voltage is 2.5 V. The LMX2470 features a typical current consumption of 4.1 mA at 2.5 V. The LMX2470 is available in a 24 lead 3.5 X 4.5 X 0.6 mm package.

The LMX2470 is a low power, high performance delta-sigma fractional-N PLL with an auxiliary integer-N PLL. The device is fabricated using TI’s advanced BiCMOS process.

With delta-sigma architecture, fractional spur compensation is achieved with noise shaping capability of the delta-sigma modulator and the inherent low pass filtering of the PLL loop filter. Fractional spurs at lower frequencies are pushed to higher frequencies outside the loop bandwidth. Unlike analog compensation, the digital feedback techniques used in the LMX2470 are highly resistant to changes in temperature and variations in wafer processing. With delta-sigma architecture, the ability to push close in spur and phase noise energy to higher frequencies is a direct function of the modulator order. The higher the order, the more this energy can be spread to higher frequencies. The LMX2470 has a programmable modulator up to order four, which allows the designer to select the optimum modulator order to fit the phase noise, spur, and lock time requirements of the system.

Programming is fast and simple. Serial data is transferred into the LMX2470 via a three line MICROWIRE interface (Data, Clock, Load Enable). Nominal supply voltage is 2.5 V. The LMX2470 features a typical current consumption of 4.1 mA at 2.5 V. The LMX2470 is available in a 24 lead 3.5 X 4.5 X 0.6 mm package.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Descargar la versión más reciente en inglés Fecha
* Hoja de datos LMX2470 2.6 GHz Delta-Sigma Fractional-N PLL with 800 MHz Integer-N PLL datasheet (Rev. B) 6/03/2013
Nota sobre la aplicación AN-1879 Fractional N Frequency Synthesis (Rev. B) 18/11/2021
Guía del usuario USB Interface Board for use with LMK and LMX User Guide 27/01/2012
Guía del usuario 2.6 GHz Delta-Sigma Fractional-N PLL with 800 MHz Integer-N PLL 26/01/2012
Nota sobre la aplicación Delta Sigma PLLs Raise The Standard For Performance 5/03/2003

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.

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
Herramienta de diseño

PLLATINUMSIM-SW — Filtro de bucle PLL, ruido de fase, tiempo de bloqueo y herramienta de simulación de impulsos

PLLATINUMSIM-SW es una herramienta de simulación que permite a los usuarios crear diseños detallados y simulaciones de nuestros circuitos integrados PLLatinum™, que incluyen la serie LMX de bucles de bloqueo de fase (PLL) y sintetizadores.

Productos y hardware compatibles
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
ULGA (NPF) 24 Ultra Librarian
Se aplican los Términos y condiciones estándar de TI para los elementos de evaluación.

Pedidos y calidad

Soporte y capacitación

Foros de TI E2E™ con asistencia técnica de los ingenieros de TI

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