VCA820

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150MHz BW with linear in dB gain control variable gain amplifier

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Product details

Parameters

PGA/VGA VGA Number of channels (#) 1 BW @ Acl (MHz) 150 Vs (Max) (V) 12 Vs (Min) (V) 7 Acl, min spec gain (V/V) 10 Gain (Max) (dB) 40 Slew rate (Typ) (V/us) 1700 Operating temperature range (C) -40 to 85 open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

Package | Pins | Size

SOIC (D) 14 52 mm² 8.65 x 6 VSSOP (DGS) 10 9 mm² 3 x 3 open-in-new Find other Programmable & variable gain amplifiers (PGA/VGA)

Features

  • 150-MHz Small-Signal Bandwidth
  • 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 ±0.4dB
  • High Output Current: 160 mA
  • APPLICATIONS
    • AGC Receivers With RSSI
    • Differential Line Receivers
    • Pulse Amplitude Compensation
    • Variable Attenuators

All other trademarks are the property of their respective owners

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Description

The VCA820 is a dc-coupled, wideband, linear in dB, continuously variable, voltage-controlled gain amplifier. The VCA820 provides a differential input to single-ended conversion with a high-impedance gain control input, used to vary the gain down 40 dB from the nominal maximum gain set by the gain resistor (RG) and feedback resistor (RF).

The VCA820 internal architecture 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 VCA820 adjusts the gain linearly in dB as the control voltage varies from 0 V to +2 V. For example, set for a maximum gain of +10 V/V, the VCA820 provides 20 dB, at +2-V input, to –20 dB at 0-V input of gain control range. The VCA820 offers excellent gain linearity. For a 20-dB maximum gain, and a gain-control input voltage varying between 1 V and 2 V, the gain does not deviate by more than ±0.4dB (maximum at +25°C).

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Technical documentation

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No results found. Please clear your search and try again. View all 4
Type Title Date
* Datasheet VCA820 Wideband, > 40-dB Adjust Range, Linear in dB Variable Gain Amplifier datasheet (Rev. D) Sep. 09, 2015
More literature The Signal e-book: A compendium of blog posts on op amp design topics Mar. 28, 2017
Application notes Implementating a Variable-Length Cat5e Cable Equalizer Apr. 25, 2010
Application notes Wireline Data Transmission and Reception Jan. 27, 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
DEM-VCA-MSOP-1A
DEM-VCA-MSOP-1A
document-generic User guide
$5.00
Features
  • Free
  • Unpopulated demonstration fixture
EVALUATION BOARDS Download
DEM-VCA-SO-1B
DEM-VCA-SO-1B
document-generic User guide
$5.00
Features
  • Free
  • Unpopulated demonstration fixture

Design tools & simulation

SIMULATION MODELS Download
SBOC287B.TSC (39 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SBOC288.ZIP (5 KB) - PSpice Model
SIMULATION MODELS Download
SBOM314A.ZIP (10 KB) - TINA-TI Spice Model
SIMULATION TOOLS Download
SPICE-based analog simulation program
TINA-TI 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 (...)
document-generic User guide

CAD/CAE symbols

Package Pins Download
SOIC (D) 14 View options
VSSOP (DGS) 10 View options

Ordering & quality

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