VCA821 Programmable Voltage Controlled Gain Amplifier Module for DIY Arduino

VCA821 Programmable Voltage Controlled Gain Amplifier Module for DIY Arduino

Descirption:
The VCA821 is a dc-coupled, wideband, linear in dB, 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 VCA821 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 6dB and 32dB. Operating from ±5V supplies, the gain control voltage for the VCA821 adjusts the gain linearly in dB as the control voltage varies from 0V to +2V. For example, set at a maximum gain of 20dB, the VCA821 provides 20dB, at VG = +2V, to less than -20dB at VG = 0V. The VCA821 offers excellent gain linearity. For a 20dB maximum gain, and a gain-control input voltage varying between +1V and +2V, the gain does not deviate by more than ±0.3dB (maximum at +25°C).

Feature:
- 710MHz SMALL-SIGNAL BANDWIDTH(G = +2V/V)
- 320MHz, 4VPP BANDWIDTH (G = +10V/V)
- 0.1dB GAIN FLATNESS to 135MHz
- 2500V/us SLEW RATE
- > 40dB GAIN ADJUST RANGE
- HIGH GAIN ACCURACY: 20dB ±0.3dB
- HIGH OUTPUT CURRENT: ±90mA

Application:
- AGC RECEIVERS with RSSI
- DIFFERENTIAL LINE RECEIVERS
- PULSE AMPLITUDE COMPENSATION
- VARIABLE ATTENUATORS
- VOLTAGE-TUNABLE ACTIVE FILTERS

Package List:
- 1 x VCA821 Voltage Controlled Gain Amplifier Module