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VCA824ID

Wideband 420MHz, >40dB Gain Adjust Range, Linear in V/V Variable Gain Amplifier

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

VCA824ID
Datasheet:

VCA824ID Datasheet (PDF)
Amplifier Type:

Variable Gain
Number of Circuits:

1
Slew Rate:

2500V/µs
-3db Bandwidth:

710 MHz
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VCA824ID General Description

The VCA824 is a DC-coupled, wideband, linear-in V/V, continuously variable, voltage-controlled gain amplifier. The device 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 (R_G) and feedback resistor (R_F).

The VCA824 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 40 V/V. Operating from ±5-V supplies, the gain control voltage for the VCA824 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 VCA824 provides 10 V/V, at 1-V input, to 0.1 V/V at –1-V input of gain control range. The VCA824 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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Key Features

710-MHz Small-Signal Bandwidth (G = 2 V/V)
320 MHz, 4-V_PP Bandwidth (G = 10 V/V)
0.1-dB Gain Flatness to 135 MHz
2500-V/µs Slew Rate
> 40-dB Gain Adjust Range
High Gain Accuracy: 20-dB ±0.3-dB
High Output Current: ±90 mA

Specifications

Category	Integrated Circuits (ICs)LinearAmplifiersInstrumentation, OP Amps, Buffer Amps	Series	-
Amplifier Type	Variable Gain	Number of Circuits	1
Output Type	-	Slew Rate	2500V/µs
-3db Bandwidth	710 MHz	Current - Input Bias	19 µA
Voltage - Input Offset	4 mV	Current - Supply	36.5mA
Current - Output / Channel	90 mA	Voltage - Supply Span (Min)	8 V
Voltage - Supply Span (Max)	12 V	Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount	Base Product Number	VCA824

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Ratings and Reviews

E**h 02/10/2024

The chip is normal new and the resistance showed 3,42 kohm, mostly satisfied left to solder. It is a pity that the seller without a conder sells at such a price (i have a conder only 40 uah costs), and another one hundred are ready to remake for 700 uah-ya x... it from these baryg

Z**e 08/03/2023

Checked-works well. Thank you to the seller. Everything is ok.

J**e 09/16/2022

It took a short time, but still it came

M**a 07/06/2022

Long, but everything works