Electronic contest module: AGC module VCA822 module automatic gain control can DAC voltage control

VCA822:AGC automatic gain control module

Module features:

VCA810TI (TIA broadband, with a low offset voltage, continuous variable voltage control gain amplifier, can provide differential input single output, with excellent common mode rejection ratio, and the most prominent advantage is thatVCA810Can achieve-40dB~40dBLinear gain control, gain control accuracy1.5dB,.5Power supply gain control voltage from0VChange to-2VGain from-40dBChange linearly+40dB.VCA810Time gain control, sonar system, voltage tunable active filter, logarithmic amplifier, pulse amplitude compensation, andRSSITheAGCReceiver is widely used;

Two, module features:

1, the use of VCA810 andhigh speedOperational amplifier cascade mode, the operational amplifier can be customized amplification; the default characteristics of the onboard parameters are as follows:-3dBCutoff frequency is approximately34MHz, the gain fluctuation in the passband is very small.1KHz~10MHzThe input signal ripple is not more than1dB, the input and output impedance is50.Non distorted signal input range:.10mV~.0.75VThe maximum amplitude of the output signal is determined by the amplifier,VCA810Chip signal output amplitude range:.5mV~.1.25V.

2, gain control: manual potentiometer adjustment or automaticDAControl, control voltage range-2V~0VThe default linear gain control range on the board:-38dB~40dB; adjust the board on the resistance, gain 80dB range variable.

3, the input and output interface using a professional SMA interface;

4, using the integrity of the circuit design, you can achieve all of the functions of VCA810, such as: the use of positive or negative input, differential input,DC offsetCalibration and so on; because the circuit will be some conflict, so part of the component is not welding; if there is a special request to buy contact us, the number of us by default delivery, but can provide components of their own welding;

5, the use of industrial grade wiring, to provide reliable contact, reduce some unexpected problems; module is not only for learning, but also can be used to really use;

Three, the actual picture:

Four, module application:

1, high frequency amplifier applications;

2, the need to stabilize the output of the application;

Five, module performance parameters:

1, module power supply: +-5V;

2, the specific parameters of reference Datasheet VCA822;

Six, suite:

1, AGC822 module 1;

2, principle diagram (PDF);