VCA822

AKTIV

Breitband, Verstärkungseinstellbereich > 40dB, linearer Verstärker mit variabler Verstärkung in V/V

Produktdetails

PGA/VGA VGA Number of channels 1 Vs (min) (V) 7 Vs (max) (V) 12 BW at Acl (MHz) 150 Acl, min spec gain (V/V) 10 Features Analog Gain Set, Differential to Single-ended conversion Slew rate (typ) (V/µs) 1700 Iq per channel (typ) (mA) 36.5 Gain (max) (dB) 40 Rating Catalog Operating temperature range (°C) -40 to 85
PGA/VGA VGA Number of channels 1 Vs (min) (V) 7 Vs (max) (V) 12 BW at Acl (MHz) 150 Acl, min spec gain (V/V) 10 Features Analog Gain Set, Differential to Single-ended conversion Slew rate (typ) (V/µs) 1700 Iq per channel (typ) (mA) 36.5 Gain (max) (dB) 40 Rating Catalog Operating temperature range (°C) -40 to 85
SOIC (D) 14 51.9 mm² 8.65 x 6 VSSOP (DGS) 10 14.7 mm² 3 x 4.9
  • 150-MHz Small-Signal Bandwidth
    (G = +10 V/V)
  • 137 MHz, 5 VPP Bandwidth (G = +10 V/V)
  • 0.1-dB Gain Flatness to 28 MHz
  • 1700 V/μs Slew Rate
  • > 40-dB Gain Adjust Range
  • High Gain Accuracy: 20 dB ±0.3 dB
  • High Output Current: ±160 mA
  • 150-MHz Small-Signal Bandwidth
    (G = +10 V/V)
  • 137 MHz, 5 VPP Bandwidth (G = +10 V/V)
  • 0.1-dB Gain Flatness to 28 MHz
  • 1700 V/μs Slew Rate
  • > 40-dB Gain Adjust Range
  • High Gain Accuracy: 20 dB ±0.3 dB
  • High Output Current: ±160 mA

The VCA822 device is a DC-coupled, wideband, linear in V/V, continuously variable, voltage-controlled gain amplifier. It provides a differential input to single-ended conversion with a high-impedance gain control input used to vary the gain down 40dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF).

The internal architecture of the VCA822 device consists of two input buffers and an output current feedback amplifier stage integrated with a multiplier core to provide a complete variable gain amplifier (VGA) system that does not require external buffering. The maximum gain is set externally with two resistors, providing flexibility in designs. The maximum gain is intended to be set between +2 V/V and +100 V/V. Operating from ±5-V supplies, the gain control voltage for the VCA822 device adjusts the gain linearly in V/V as the control voltage varies from +1 V to 1 V. For example, set for a maximum gain of +10 V/V, the VCA822 device provides 10 V/V, at
1-V input, to 0.1 V/V at –1 V input of gain control range. The VCA822 device offers excellent gain linearity. For a 20-dB maximum gain and a gain-control input voltage varying between 0 V and 1 V, the gain does not deviate by more than ±0.3 dB (maximum at +25°C).

 

The VCA822 device is a DC-coupled, wideband, linear in V/V, continuously variable, voltage-controlled gain amplifier. It provides a differential input to single-ended conversion with a high-impedance gain control input used to vary the gain down 40dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF).

The internal architecture of the VCA822 device consists of two input buffers and an output current feedback amplifier stage integrated with a multiplier core to provide a complete variable gain amplifier (VGA) system that does not require external buffering. The maximum gain is set externally with two resistors, providing flexibility in designs. The maximum gain is intended to be set between +2 V/V and +100 V/V. Operating from ±5-V supplies, the gain control voltage for the VCA822 device adjusts the gain linearly in V/V as the control voltage varies from +1 V to 1 V. For example, set for a maximum gain of +10 V/V, the VCA822 device provides 10 V/V, at
1-V input, to 0.1 V/V at –1 V input of gain control range. The VCA822 device offers excellent gain linearity. For a 20-dB maximum gain and a gain-control input voltage varying between 0 V and 1 V, the gain does not deviate by more than ±0.3 dB (maximum at +25°C).

 

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Technische Dokumentation

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Typ Titel Datum
* Data sheet VCA822 Wideband, > 40-dB Gain Adjust Range, Linear in V/V Variable Gain Amplifier datasheet (Rev. D) PDF | HTML 29 Okt 2015
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mär 2017
Application note Implementating a Variable-Length Cat5e Cable Equalizer 25 Apr 2010
Application note Wireline Data Transmission and Reception 27 Jan 2010

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Evaluierungsplatine

DEM-VCA-MSOP-1A — DEM-VCA-MSOP-1A

Benutzerhandbuch: PDF
Evaluierungsplatine

DEM-VCA-SO-1B — DEM-VCA-SO-1B

Benutzerhandbuch: PDF
Simulationsmodell

VCA822 PSpice Model (Rev. A)

SBOC290A.ZIP (45 KB) - PSpice Model
Simulationsmodell

VCA822 TINA-TI Reference Design (Rev. B)

SBOC289B.TSC (40 KB) - TINA-TI Reference Design
Simulationsmodell

VCA822 TINA-TI Spice Model (Rev. A)

SBOM315A.ZIP (11 KB) - TINA-TI Spice Model
Simulationstool

PSPICE-FOR-TI — PSpice® für TI Design-und Simulationstool

PSpice® für TI ist eine Design- und Simulationsumgebung, welche Sie dabei unterstützt, die Funktionalität analoger Schaltungen zu evaluieren. Diese voll ausgestattete Design- und Simulationssuite verwendet eine analoge Analyse-Engine von Cadence®. PSpice für TI ist kostenlos erhältlich und (...)
Simulationstool

TINA-TI — SPICE-basiertes analoges Simulationsprogramm

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 (...)
Benutzerhandbuch: PDF
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
SOIC (D) 14 Ultra Librarian
VSSOP (DGS) 10 Ultra Librarian

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