VCA822

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Amplificador de ganancia variable lineal en V/V de rango ajustable de ganancia y banda ancha >40 dB

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document-pdfAcrobat VCA822 Wideband, > 40-dB Gain Adjust Range, Linear in V/V Variable Gain Amplifier datasheet (Rev. D) (Inglés) PDF | HTML

VCA822

ACTIVO

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Detalles del producto

PGA/VGA

VGA

Number of channels

1

Vs (min) (V)

7

Vs (max) (V)

12

Input type

Differential

Output type

Single-ended

Interface type

Resistance

BW at Acl (MHz)

150

Acl, min spec gain (V/V)

2

Voltage gain (min) (V/V)

100

Voltage gain (max) (V/V)

2

Gain (max) (dB)

40

Architecture

Bipolar

Features

Analog Gain Set, Differential to Single-ended conversion

Vos (offset voltage at 25°C) (typ) (mV)

4

Input voltage noise (typ) (µV√Hz)

0.0082

Slew rate (typ) (V/µs)

1700

Iq per channel (typ) (mA)

36.5

Rating

Catalog

Operating temperature range (°C)

-40 to 85

PGA/VGA

VGA

Number of channels

1

Vs (min) (V)

7

Vs (max) (V)

12

Input type

Differential

Output type

Single-ended

Interface type

Resistance

BW at Acl (MHz)

150

Acl, min spec gain (V/V)

2

Voltage gain (min) (V/V)

100

Voltage gain (max) (V/V)

2

Gain (max) (dB)

40

Architecture

Bipolar

Features

Analog Gain Set, Differential to Single-ended conversion

Vos (offset voltage at 25°C) (typ) (mV)

4

Input voltage noise (typ) (µV√Hz)

0.0082

Slew rate (typ) (V/µs)

1700

Iq per channel (typ) (mA)

36.5

Rating

Catalog

Operating temperature range (°C)

-40 to 85

SOIC (D)

14

51.9 mm² (8.65 mm × 6 mm)

VSSOP (DGS)

10

14.7 mm² (3 mm × 4.9 mm)

150-MHz Small-Signal Bandwidth
(G = +10 V/V)
137 MHz, 5 V_PP 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 V_PP 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 (R_G) and feedback resistor (R_F).

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 (R_G) and feedback resistor (R_F).

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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Documentación técnica

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Documentación principal	Tipo	Título	Opciones de formato	Fecha
*	Hoja de datos	VCA822 Wideband, > 40-dB Gain Adjust Range, Linear in V/V Variable Gain Amplifier datasheet (Rev. D)	PDF \| HTML	29/10/2015
	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	Implementating a Variable-Length Cat5e Cable Equalizer		25/04/2010
	Nota sobre la aplicación	Wireline Data Transmission and Reception		27/01/2010

Diseño y desarrollo

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