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Amplificadores de ganancia programable y variable (PGA y VGA)

LMH6514

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Amplificador de ganancia variable, control digital y 600 MHz con pasos de 6.02 dB

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LMH6514

ACTIVO
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Detalles del producto

PGA/VGA VGA Number of channels 1 Vs (min) (V) 4 Vs (max) (V) 5.25 Input type Differential Output type Differential Interface type Digital Gain Set BW at Acl (MHz) 600 Acl, min spec gain (V/V) 0.25 Voltage gain (min) (V/V) 0.25 Voltage gain (max) (V/V) 32 Gain (max) (dB) 30 Architecture Fully Differential ADC Driver Features Single-ended to Differential conversion Input voltage noise (typ) (µV√Hz) 1800 Slew rate (typ) (V/µs) 1600 Iq per channel (typ) (mA) 107 Rating Catalog Operating temperature range (°C) -40 to 85
PGA/VGA VGA Number of channels 1 Vs (min) (V) 4 Vs (max) (V) 5.25 Input type Differential Output type Differential Interface type Digital Gain Set BW at Acl (MHz) 600 Acl, min spec gain (V/V) 0.25 Voltage gain (min) (V/V) 0.25 Voltage gain (max) (V/V) 32 Gain (max) (dB) 30 Architecture Fully Differential ADC Driver Features Single-ended to Differential conversion Input voltage noise (typ) (µV√Hz) 1800 Slew rate (typ) (V/µs) 1600 Iq per channel (typ) (mA) 107 Rating Catalog Operating temperature range (°C) -40 to 85
WQFN (RGH) 16 16 mm² (4 mm × 4 mm)
  • Adjustable Gain with a 42 dB Range
  • Precise 6.02 dB Gain Steps
  • Parallel 3 Bit Gain Control
  • On Chip Register Gain Setting
  • Fully Differential Signal Path
  • Single Ended to Differential Capable
  • 200Ω Input Impedance
  • Small Footprint (4 mm x 4 mm) WQFN Package

Key Specifications

  • 600 MHz bandwidth at 100Ω load
  • 39 dBm OIP3 at 75 MHz, 200Ω load
  • 26 dB to 38 dB maximum gain
  • Selectable output impedance of 200Ω or 400Ω.
  • 8.3 dB noise figure
  • 5 ns gain step switching time
  • 100 mA supply current

All trademarks are the property of their respective owners.

  • Adjustable Gain with a 42 dB Range
  • Precise 6.02 dB Gain Steps
  • Parallel 3 Bit Gain Control
  • On Chip Register Gain Setting
  • Fully Differential Signal Path
  • Single Ended to Differential Capable
  • 200Ω Input Impedance
  • Small Footprint (4 mm x 4 mm) WQFN Package

Key Specifications

  • 600 MHz bandwidth at 100Ω load
  • 39 dBm OIP3 at 75 MHz, 200Ω load
  • 26 dB to 38 dB maximum gain
  • Selectable output impedance of 200Ω or 400Ω.
  • 8.3 dB noise figure
  • 5 ns gain step switching time
  • 100 mA supply current

All trademarks are the property of their respective owners.

The LMH6514 is a high performance, digitally controlled variable gain amplifier (DVGA). It combines precision gain control with a low noise, ultra-linear, differential amplifier. Typically, the LMH6514 drives a high performance ADC in a broad range of mixed signal and digital communication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dynamic range. When used in conjunction with a high speed ADC, system dynamic range can be extended by up to 42 dB.

The LMH6514 has a differential input and output allowing large signal swings on a single 5V supply. It is designed to accept signals from RF elements and maintain a terminated impedance environment. The input impedance is 200Ω resistive. The output impedance is either 200Ω or 400Ω and is user selectable. A unique internal architecture allows use with both single ended and differential input signals.

Input signals to the LMH6514 are scaled by a highly linear, digitally controlled attenuator with seven accurate 6 dB steps. The attenuator output provides the input signal for a high gain, ultra linear differential transconductor. The transconductor differential output current can be converted into a voltage by using the on-chip 200Ω or 400Ω loads. The transconductance gain is 0.1 Amp/Volt resulting in a maximum voltage gain of +32 dB when driving a 200Ω load, or 38 dB when driving the 400Ω load.

The LMH6514 operates over the industrial temperature range of −40°C to +85°C. The LMH6514 is available in a 16-Pin, thermally enhanced, WQFN package.

The LMH6514 is a high performance, digitally controlled variable gain amplifier (DVGA). It combines precision gain control with a low noise, ultra-linear, differential amplifier. Typically, the LMH6514 drives a high performance ADC in a broad range of mixed signal and digital communication applications such as mobile radio and cellular base stations where automatic gain control (AGC) is required to increase system dynamic range. When used in conjunction with a high speed ADC, system dynamic range can be extended by up to 42 dB.

The LMH6514 has a differential input and output allowing large signal swings on a single 5V supply. It is designed to accept signals from RF elements and maintain a terminated impedance environment. The input impedance is 200Ω resistive. The output impedance is either 200Ω or 400Ω and is user selectable. A unique internal architecture allows use with both single ended and differential input signals.

Input signals to the LMH6514 are scaled by a highly linear, digitally controlled attenuator with seven accurate 6 dB steps. The attenuator output provides the input signal for a high gain, ultra linear differential transconductor. The transconductor differential output current can be converted into a voltage by using the on-chip 200Ω or 400Ω loads. The transconductance gain is 0.1 Amp/Volt resulting in a maximum voltage gain of +32 dB when driving a 200Ω load, or 38 dB when driving the 400Ω load.

The LMH6514 operates over the industrial temperature range of −40°C to +85°C. The LMH6514 is available in a 16-Pin, thermally enhanced, WQFN 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 LMH6514 600 MHz, Digital Controlled, Variable Gain Amplifier datasheet (Rev. A) 18/03/2013
Libro electrónico The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML 28/03/2017
Nota sobre la aplicación AN-1719 Noise Figure Analysis Fully Differential Amplifier (Rev. A) 1/05/2013
Guía del usuario LMH6514 Digital Controlled Variable Gain Amplifier Evaluation Board (Rev. A) 1/05/2013
Nota sobre la aplicación Using High Speed Diff Amp to Drive ADCs (Rev. A) 26/04/2013
Nota sobre la aplicación Selecting Amplifiers, ADCs, and Clocks for High-Performance Signal Paths 13/09/2007
Nota sobre la aplicación A Walk Along the Signal Path (High-Speed Signal Path) 30/03/2005

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WQFN (RGH) 16 Ultra Librarian
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