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VCA810

Part Number	VCA810
Manufacturer	Burr-Brown Corporation
Description	High Gain Adjust Range/ Wideband/ Voltage-Controlled Amplifier
Published	Apr 16, 2005
Detailed Description	VCA810 SBOS275C − JUNE 2003 − REVISED OCTOBER 2004 High Gain Adjust Range, Wideband, Voltage-Controlled Amplifier FEATU...
Datasheet	VCA810 PDF File

Overview

VCA810 SBOS275C − JUNE 2003 − REVISED OCTOBER 2004 High Gain Adjust Range, Wideband, Voltage-Controlled Amplifier FEATURES D D D D D D D D D HIGH GAIN ADJUST RANGE: +40dB DIFFERENTIAL IN/SINGLE-ENDED OUT LOW INPUT NOISE VOLTAGE: 2.
4nV//Hz CONSTANT BANDWIDTH vs GAIN: 35MHz HIGH dB/V GAIN LINEARITY: +0.
3dB GAIN CONTROL BANDWIDTH: 25MHz LOW OUTPUT DC ERROR: < +40mV HIGH OUTPUT CURRENT: +60mA LOW SUPPLY CURRENT: 24.
8mA (max for −405C to +855C temperature range) DESCRIPTION The VCA810 is a DC-coupled, wideband, continuously variable, voltage-controlled gain amplifier.
It provides a differential input to single-ended output conversion with a high-impedance gain control input used to vary the gain over a –40dB to +40dB range linear in dB/V.
Operating from ±5V supplies, the gain control voltage for the VCA810 will adjust the gain from –40dB at 0V input to +40dB at –2V input.
Increasing the control voltage above ground will attenuate the signal path to > 80dB.
Signal bandwidth and slew rate remain constant over the entire gain adjust range.
This 40dB/V gain control is accurate within ±1.
5dB (±0.
9dB for High Grade), allowing the gain control voltage in an AGC application to be used as a Received Signal Strength Indicator (RSSI) with ±1.
5dB accuracy.
Excellent common-mode rejection and common-mode input range at the two high-impedance inputs allow the VCA810 to provide a differential receiver operation with gain adjust.
The output signal is referenced to ground.
Zero differential input voltage gives a 0V output with a small DC offset error.
Low input noise voltage ensures good output SNR at the highest gain settings.
In applications where pulse edge information is critical, and the VCA810 is being used to equalize varying channel loss, minimal change in group delay over gain setting will retain excellent pulse edge information.
An improved output stage provides adequate output current to drive the most demanding loads.
While principally intended to drive analog-to-digital co...

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