LMH6518

ACTIVO

Amplificador de ganancia variable, 900 MHz y control digital

Detalles del producto

PGA/VGA PGA Number of channels 1 Vs (min) (V) 4.75 Vs (max) (V) 5.25 BW at Acl (MHz) 900 Acl, min spec gain (V/V) 0.87 Architecture Fully Differential ADC Driver Features Digital Gain Set, Integrated Clamps, Single-ended to Differential conversion Slew rate (typ) (V/µs) 760 Iq per channel (typ) (mA) 210 Gain (max) (dB) 38.8 Rating Catalog Operating temperature range (°C) -40 to 85
PGA/VGA PGA Number of channels 1 Vs (min) (V) 4.75 Vs (max) (V) 5.25 BW at Acl (MHz) 900 Acl, min spec gain (V/V) 0.87 Architecture Fully Differential ADC Driver Features Digital Gain Set, Integrated Clamps, Single-ended to Differential conversion Slew rate (typ) (V/µs) 760 Iq per channel (typ) (mA) 210 Gain (max) (dB) 38.8 Rating Catalog Operating temperature range (°C) -40 to 85
WQFN (RGH) 16 16 mm² 4 x 4
  • Gain range: 40dB
  • Gain step size: 2dB
  • Combined gain resolution with GSPS ADCs: 8.5mdB
  • Minimum gain: −1.16dB
  • Maximum gain: 38.8dB
  • −3dB bandwidth (BW): 900MHz
  • Rise and fall time: < 500ps
  • Recovery time: < 5ns
  • Propagation delay variation: 100ps
  • HD2 at 100MHz: −50dBc
  • HD3 at 100MHz: −53dBc
  • Input-referred noise (maximum gain): 0.98nV/√Hz
  • Overvoltage clamps for fast recovery
  • Power consumption: auxiliary turned off 1.1W to 0.75W
  • Gain range: 40dB
  • Gain step size: 2dB
  • Combined gain resolution with GSPS ADCs: 8.5mdB
  • Minimum gain: −1.16dB
  • Maximum gain: 38.8dB
  • −3dB bandwidth (BW): 900MHz
  • Rise and fall time: < 500ps
  • Recovery time: < 5ns
  • Propagation delay variation: 100ps
  • HD2 at 100MHz: −50dBc
  • HD3 at 100MHz: −53dBc
  • Input-referred noise (maximum gain): 0.98nV/√Hz
  • Overvoltage clamps for fast recovery
  • Power consumption: auxiliary turned off 1.1W to 0.75W

The LMH6518 is a digitally controlled variable gain amplifier with a total gain that varies from –1.16dB to 38.8dB for a 40dB range in 2dB steps. The −3dB bandwidth is 900MHz at all gains. Gain accuracy at each setting is typically 0.1dB. When used in conjunction with TI’s gigasamples per second (GSPS) ADC with adjustable full-scale range, the LMH6518 gain adjustment accommodates full scale input signals from 6.8mVPP to 920mVPP to get 700mVPP nominal at the ADC input. The auxiliary output (+OUT AUX and −OUT AUX) follows the main output and is intended for use in oscilloscope trigger function circuitry, but can have other uses in other applications.

The LMH6518 gain is programmed through a SPI-compatible serial bus. A signal path combined gain resolution of 8.5mdB is achieved when the device gain and the GSPS ADC FS input are both manipulated. Inputs and outputs are dc-coupled. The outputs are differential with individual common-mode voltage control (for main and auxiliary outputs), and have selectable bandwidth limiting circuitry (common to both main and auxiliary) of 20MHz, 100MHz, 200MHz, 350MHz, 650MHz, 750MHz, or full BW.

The LMH6518 is a digitally controlled variable gain amplifier with a total gain that varies from –1.16dB to 38.8dB for a 40dB range in 2dB steps. The −3dB bandwidth is 900MHz at all gains. Gain accuracy at each setting is typically 0.1dB. When used in conjunction with TI’s gigasamples per second (GSPS) ADC with adjustable full-scale range, the LMH6518 gain adjustment accommodates full scale input signals from 6.8mVPP to 920mVPP to get 700mVPP nominal at the ADC input. The auxiliary output (+OUT AUX and −OUT AUX) follows the main output and is intended for use in oscilloscope trigger function circuitry, but can have other uses in other applications.

The LMH6518 gain is programmed through a SPI-compatible serial bus. A signal path combined gain resolution of 8.5mdB is achieved when the device gain and the GSPS ADC FS input are both manipulated. Inputs and outputs are dc-coupled. The outputs are differential with individual common-mode voltage control (for main and auxiliary outputs), and have selectable bandwidth limiting circuitry (common to both main and auxiliary) of 20MHz, 100MHz, 200MHz, 350MHz, 650MHz, 750MHz, or full BW.

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Documentación técnica

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Tipo Título Fecha
* Data sheet LMH6518 900MHz, Digitally Controlled Variable Gain Amplifier datasheet (Rev. E) PDF | HTML 31 jul 2024
EVM User's guide LMH6518 Evaluation Module User's Guide PDF | HTML 08 oct 2024
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 mar 2017
Application note AN-1718 Differential Amplifier Applications Up to 400 MHz (Rev. B) 01 may 2013
Application note AN-1719 Noise Figure Analysis Fully Differential Amplifier (Rev. A) 01 may 2013
EVM User's guide AN-1906 LMH6518 Evaluation Board (Rev. B) 01 may 2013
Application note Using High Speed Diff Amp to Drive ADCs (Rev. A) 26 abr 2013
More literature Featured High Speed Differential Amplifiers 23 oct 2012
Application note A Walk Along the Signal Path (High-Speed Signal Path) 30 mar 2005

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

LMH6518EVM — Módulo de evaluación LMH6518

El módulo de evaluación (EVM) LMH6518 está diseñado para ayudar en la caracterización del amplificador diferencial LMH6518. La placa de evaluación fácil de usar está diseñada para proporcionar una configuración rápida y ofrecer un análisis de señal de alto rendimiento. El EVM está listo para (...)
Guía del usuario: PDF | HTML
GUI para el módulo de evaluación (EVM)

SNOC007 LMH6518 GUI Set Up Files

Productos y hardware compatibles

Productos y hardware compatibles

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Amplificadores de ganancia programable y variable (PGA y VGA)
LMH6518 Amplificador de ganancia variable, 900 MHz y control digital
Herramienta de cálculo

LMH6518DESIGN-CALC — Calculadora ECM LMH6518 de ganancia FS de información de aplicación

Herramienta de simulación

PSPICE-FOR-TI — PSpice® para herramienta de diseño y simulación de TI

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Herramienta de simulación

TINA-TI — Programa de simulación analógica basado en SPICE

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Guía del usuario: PDF
Encapsulado Pines Símbolos CAD, huellas y modelos 3D
WQFN (RGH) 16 Ultra Librarian

Pedidos y calidad

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  • 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

Soporte y capacitación

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