Wideband, >40dB Gain Adjust Range, Linear in V/V Variable Gain Amplifier


Product details


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)


  • 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
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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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Technical documentation

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Type Title Date
* Datasheet VCA822 Wideband, > 40-dB Gain Adjust Range, Linear in V/V Variable Gain Amplifier datasheet (Rev. D) Oct. 29, 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

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SBOC289B.TSC (40 KB) - TINA-TI Reference Design
SBOC290.ZIP (5 KB) - PSpice Model
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SOIC (D) 14 View options
VSSOP (DGS) 10 View options

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Posted: 06-Jan-2017
Duration: 04:37

For more information about the LMH6401 check out the product web page

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