LMX2820

ACTIVO

Sintetizador RF de banda ancha de 22,6 GHz con sincronización de fase, JESD y calibración de frecuen

Detalles del producto

Frequency (max) (MHz) 22600 Frequency (min) (MHz) 45 Normalized PLL phase noise (dBc/Hz) -236 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -134 Features Integer-boundary spurs (IBS) removal, Integrated VCO, JESD204B SYSREF, Multi-device sync, Phase adjustment, Ultra-fast VCO Calibration, Wideband Current consumption (mA) 500 Integrated VCO Yes Operating temperature range (°C) -40 to 85 Rating Catalog Lock time (µs) (typ) (s) Loop BW dependent
Frequency (max) (MHz) 22600 Frequency (min) (MHz) 45 Normalized PLL phase noise (dBc/Hz) -236 1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz) -134 Features Integer-boundary spurs (IBS) removal, Integrated VCO, JESD204B SYSREF, Multi-device sync, Phase adjustment, Ultra-fast VCO Calibration, Wideband Current consumption (mA) 500 Integrated VCO Yes Operating temperature range (°C) -40 to 85 Rating Catalog Lock time (µs) (typ) (s) Loop BW dependent
VQFNP (RTC) 48 49 mm² 7 x 7
  • Output frequency: 45 MHz to 22.6 GHz
  • 36-fs rms jitter (12 kHz – 95 MHz) at 6 GHz
  • High-performance PLL
    • Figure of merit: –236 dBc/Hz
    • Normalized 1/f noise: –134 dBc/Hz
    • -95 dBc Integer Mode Spurs (fPD=100 MHz)
    • High phase detector frequency
      • 400-MHz integer mode
      • 300-MHz fractional mode
    • Programmable input multiplier
    • Direct PFD input for offset mixing support allowing PLL N divider to be one for ultra-low jitter
  • 2.5-µs fast VCO calibration time
  • Mute pin with 200-ns mute/unmute time
  • –45-dBc VCO leakage with doubler enabled
  • Support for external VCO up to 22.6-GHz
  • Synchronization of output phase across multiple devices
  • Two differential RF outputs and one differential SYSREF output for JESD204B support
  • Output frequency: 45 MHz to 22.6 GHz
  • 36-fs rms jitter (12 kHz – 95 MHz) at 6 GHz
  • High-performance PLL
    • Figure of merit: –236 dBc/Hz
    • Normalized 1/f noise: –134 dBc/Hz
    • -95 dBc Integer Mode Spurs (fPD=100 MHz)
    • High phase detector frequency
      • 400-MHz integer mode
      • 300-MHz fractional mode
    • Programmable input multiplier
    • Direct PFD input for offset mixing support allowing PLL N divider to be one for ultra-low jitter
  • 2.5-µs fast VCO calibration time
  • Mute pin with 200-ns mute/unmute time
  • –45-dBc VCO leakage with doubler enabled
  • Support for external VCO up to 22.6-GHz
  • Synchronization of output phase across multiple devices
  • Two differential RF outputs and one differential SYSREF output for JESD204B support

The LMX2820 is a high-performance, wideband synthesizer that can generate any frequency in the range of 45 MHz to 22.6 GHz. The high performance PLL with figure of merit of –236 dBc/Hz and high phase detector frequency can attain very low in-band noise and integrated jitter. The high-speed N-divider has no pre-divider, thus significantly reducing the amplitude and number of spurs. There is also a programmable input multiplier to mitigate integer boundary spurs.

The LMX2820 allows users to synchronize the output of multiple devices and also enables applications that need deterministic delay between input and output. The fast calibration algorithm greatly reduces the VCO calibration time, enabling systems requiring fast frequency hopping. The LMX2820 can generate or repeat SYSREF that is compliant to the JESD204B standard, allowing for its use as a low-noise clock source for high-speed data converters. This synthesizer can also be used with an external VCO. A direct PFD input pin is provided to support offset mixing for low spurious transmission.

The device runs from a single 3.3-V supply and has integrated LDOs that eliminate the need for onboard low-noise LDOs.

The LMX2820 is a high-performance, wideband synthesizer that can generate any frequency in the range of 45 MHz to 22.6 GHz. The high performance PLL with figure of merit of –236 dBc/Hz and high phase detector frequency can attain very low in-band noise and integrated jitter. The high-speed N-divider has no pre-divider, thus significantly reducing the amplitude and number of spurs. There is also a programmable input multiplier to mitigate integer boundary spurs.

The LMX2820 allows users to synchronize the output of multiple devices and also enables applications that need deterministic delay between input and output. The fast calibration algorithm greatly reduces the VCO calibration time, enabling systems requiring fast frequency hopping. The LMX2820 can generate or repeat SYSREF that is compliant to the JESD204B standard, allowing for its use as a low-noise clock source for high-speed data converters. This synthesizer can also be used with an external VCO. A direct PFD input pin is provided to support offset mixing for low spurious transmission.

The device runs from a single 3.3-V supply and has integrated LDOs that eliminate the need for onboard low-noise LDOs.

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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet LMX2820 22.6-GHz Wideband PLLatinum RF Synthesizer With Phase Synchronization and JESD204B Support datasheet (Rev. C) PDF | HTML 04 feb 2021
Application note Using Instant Calibration With the LMX2820 PDF | HTML 14 jun 2025
Application note Practical Clocking Considerations That Give Your Next High-Speed Converter Design an Edge (Rev. A) PDF | HTML 11 abr 2025
Application note Combining More than Two Signals for Better Noise PDF | HTML 24 mar 2025
Application brief Compilation of RF Synthesizer Resources PDF | HTML 22 oct 2024
Application note Sine to Square Wave Conversion Using Clock Buffers PDF | HTML 03 sep 2024
Application brief Common Mistakes While Designing With Rf Clock Synthesizers and How To Mitigate the Same PDF | HTML 08 ago 2024
Circuit design MASH_SEED Optimization and Impact on Spurs (LMX2820) PDF | HTML 08 ago 2024
Application brief High-Frequency Clock (> 20GHz) Skew Variation Between Two RF Synthesizers Across Temperature PDF | HTML 26 abr 2024
Application brief High-Frequency Delay Adjustments Between Two RF Synthesizers PDF | HTML 26 abr 2024
Application brief LMX2820 with Internal Doubler versus LMX2594 PDF | HTML 16 ene 2024
Application note LMX2820 RF Synthesizer Phase Noise Improvement With Alternative Topologies (Rev. A) PDF | HTML 22 may 2023
Application note External Doubler Extends LMX2820 Operation to 44 GHz PDF | HTML 31 mar 2023
User guide How to Phase Synchronize Multiple LMX2820 Devices PDF | HTML 19 dic 2022
Application note High Isolation, Fast Frequency Switching With LMX2820 in Ping-Pong Architecture PDF | HTML 20 sep 2022
Application note Combining Two LMX2820 Synthesizer Outputs for Improved Phase Noise (Rev. A) PDF | HTML 03 mar 2022
User guide LMX2820 Register Map (Rev. A) 09 dic 2020
Application note Impact of PLL Jitter to GSPS ADC's SNR and Performance Optimization 11 nov 2020
Application note Dramatically Improve Your Lock Time with VCO Instant Calibration PDF | HTML 17 sep 2020
Certificate LMX2820EVM EU Declaration of Conformity (DoC) 09 jun 2020

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

LMX2820EVM — Módulo de evaluación del sintetizador RF de banda ancha LMX2820 de 22,6 GHz

Este módulo de evaluación es para el LMX2820, que es un sintetizador de RF de banda ancha de 22.6 GHz. Este sintetizador admite el búfer y la generación de señales SYSREF compatibles con JESD204B. El LMX2820 permite a los diseñadores sincronizar la salida de múltiples instancias del dispositivo.
Guía del usuario: PDF | HTML
No disponible en TI.com
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LMX2820 IBIS model

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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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