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Radiofrecuencia y microondas
Amplificadores de RF
Amplificadores de ganancia variable (VGA) de RF

LMH6521

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DVGA doble de alto rendimiento

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LMH6521

ACTIVO
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Detalles del producto

2nd harmonic (dBc) -84 3rd harmonic (dBc) 83 Frequency of harmonic distortion measurement (MHz) 200 Acl, min spec gain (V/V) 0.53 Architecture Fully Differential ADC Driver, VGA BW at Acl (MHz) 1400 Gain (max) (dB) 26 Gain (min) (dB) -5.5 Step size (dB) 0.5 Type RF VGA Iq per channel (typ) (mA) 113 Number of channels 2 Rating Catalog Operating temperature range (°C) -40 to 85 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.75 Vs (min) (V) 4.75 Vs (max) (V) 5.25
2nd harmonic (dBc) -84 3rd harmonic (dBc) 83 Frequency of harmonic distortion measurement (MHz) 200 Acl, min spec gain (V/V) 0.53 Architecture Fully Differential ADC Driver, VGA BW at Acl (MHz) 1400 Gain (max) (dB) 26 Gain (min) (dB) -5.5 Step size (dB) 0.5 Type RF VGA Iq per channel (typ) (mA) 113 Number of channels 2 Rating Catalog Operating temperature range (°C) -40 to 85 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.25 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 4.75 Vs (min) (V) 4.75 Vs (max) (V) 5.25
WQFN (RTV) 32 25 mm² 5 x 5
  • OIP3 of 48.5 dBm at 200 MHz
  • Maximum Voltage Gain of 26 dB
  • Gain Range: 31.5 dB with 0.5-dB Step Size
  • Channel Gain Matching of ±0.04 dB
  • Noise Figure: 7.3 dB at Maximum Gain
  • –3-dB Bandwidth of 1200 MHz
  • Low Power Dissipation
  • Independent Channel Power Down
  • Three Gain Control Modes:
    • Parallel Interface
    • Serial Interface (SPI)
    • Pulse Mode Interface
  • Temperature Range: –40°C to +85°C
  • Thermally-Enhanced, 32-Pin WQFN Package
  • OIP3 of 48.5 dBm at 200 MHz
  • Maximum Voltage Gain of 26 dB
  • Gain Range: 31.5 dB with 0.5-dB Step Size
  • Channel Gain Matching of ±0.04 dB
  • Noise Figure: 7.3 dB at Maximum Gain
  • –3-dB Bandwidth of 1200 MHz
  • Low Power Dissipation
  • Independent Channel Power Down
  • Three Gain Control Modes:
    • Parallel Interface
    • Serial Interface (SPI)
    • Pulse Mode Interface
  • Temperature Range: –40°C to +85°C
  • Thermally-Enhanced, 32-Pin WQFN Package

The LMH6521 contains two high performance, digitally controlled variable gain amplifiers (DVGA).

Both channels of the LMH6521 have an independent, digitally controlled attenuator followed by a high linearity, differential output amplifier. Each block has been optimized for low distortion and maximum system design flexibility. Each channel has a high speed power down mode.

The internal digitally controlled attenuator provides precise 0.5-dB gain steps over a 31.5-dB range. Serial and parallel programming options are provided. Serial mode programming uses the SPI interface. A pulse mode is also offered where simple up or down commands can change the gain one step at a time.

The output amplifier has a differential output allowing 10-VPPD signal swings on a single 5-V supply. The low impedance output provides maximum flexibility when driving filters or analog to digital converters.

The LMH6521 contains two high performance, digitally controlled variable gain amplifiers (DVGA).

Both channels of the LMH6521 have an independent, digitally controlled attenuator followed by a high linearity, differential output amplifier. Each block has been optimized for low distortion and maximum system design flexibility. Each channel has a high speed power down mode.

The internal digitally controlled attenuator provides precise 0.5-dB gain steps over a 31.5-dB range. Serial and parallel programming options are provided. Serial mode programming uses the SPI interface. A pulse mode is also offered where simple up or down commands can change the gain one step at a time.

The output amplifier has a differential output allowing 10-VPPD signal swings on a single 5-V supply. The low impedance output provides maximum flexibility when driving filters or analog to digital converters.
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Documentación técnica

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Documentación principal Tipo Título Opciones de formato Fecha
* Data sheet LMH6521 High Performance Dual DVGA datasheet (Rev. E) PDF | HTML 23 ago 2016
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 mar 2017
User guide Using the LMH6521 in DC Coupled Applications Design Guide 08 ene 2015
Design guide TSW1265 Dual-Wideband RF-to-Digital Receiver Design Guide 03 sep 2013
Design guide TSW1266 Wideband RF-to-Digital Complex Receiver-Feedback Signal Chain 03 sep 2013
Application note AN-1719 Noise Figure Analysis Fully Differential Amplifier (Rev. A) 01 may 2013
Application note AN-2235 Ckt Brd Design for LMH6517/21/22 & Other H-Sp IF/RF F Amp (Rev. A) 01 may 2013
Application note Between the Amplifier and ADC: Managing Filter Loss in Communications Systems (Rev. B) 26 abr 2013
Application note Drivng HSpeed ADCs w/LMH6521 DVGA for High IF AC-Coupled Apps (Rev. A) 26 abr 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

TSW1265EVM — Plataforma de diseño y evaluación de referencia de receptor doble de banda ancha

The TSW1265EVM is a wideband dual receiver reference design and evaluation platform. The signal chain allows conversion from RF to bits using a dual-channel downconverter mixer, the LMH6521 dual-channel DVGA, and the ADS4249 14-bit 250-MSPS ADC. The TSW1265EVM also includes the LMK04800 dual-PLL (...)

Guía del usuario: PDF
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Modelo de simulación

LMH6521 ADS2009 Spice Model

SNOJ009.ZIP (46 KB) - Spice Model
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Modelo de simulación

LMH6521 PSpice Model

SNOM715.ZIP (68 KB) - PSpice Model
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Modelo de simulación

LMH6521 TINA-TI Reference Design

SNOM321.TSC (286 KB) - TINA-TI Reference Design
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Modelo de simulación

LMH6521 TINA-TI Spice Model

SNOM322.ZIP (8 KB) - TINA-TI Spice Model
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Herramienta de cálculo

RF-CASCADE-CALC-TOOL — TI RF Cascade Calculator

A browser-based RF lineup analysis tool supporting up to 10 stages. Computes gain, NF, OIP3, OIP2, OP1dB, and derived metrics. Features dual-axis Plotly charts, P1dB saturation detection, and export to CSV
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Diseños de referencia

TIDA-00360 — Diseño de referencia del receptor de doble canal de 700 MHz a 2700 MHz con ADC de 16 bits y de ancho

The increasing demand on wireless networks to provide faster data links to customers has driven transceiver hardware to increasingly demanding performance with enough bandwidth to support the largest standardized multi-carrier frequency bands (with band aggregation in some cases) and enough (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

TIDA-00353 — Diseño de referencia de optimización de un enlace de serie JESD204B

Employing equalization techniques is an effective way of compensating for channel loss in JESD204B high speed serial interfaces for data converters. This reference design features the ADC16DX370, a dual 16-bit, 370 MSPS analog-to-digital converter (ADC) that utilizes de-emphasis equalization to (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

TIDA-00074 — Cadena de señal de retroalimentación del receptor complejo de RF a digital de banda ancha

This is a wideband complex-receiver reference design and evaluation platform that is ideally suited for use as a feedback receiver for transmitter digital predistortion. The EVM signal chain is ideal for high intermediate-frequency (IF) complex-feedback applications and contains a complex (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

TIDA-00073 — Diseño de receptor RF a digital de doble banda ancha

The TSW1265EVM is an example design of a wideband RF to digital dual receiver solution capable of digitizing up to 125MHz of spectrum. The system provides a reference on how to use the ADS4249, LMH6521, LMK0480x, and a dual mixer to achieve this.  This reference EVEM coupled with a capture (...)
Design guide: PDF
Esquema: PDF
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WQFN (RTV) 32 Ultra Librarian
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Pedidos y calidad

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  • 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
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  • Monitoreo continuo de confiabilidad
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  • Lugar de fabricación
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