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VCA810: VCA810

Part Number: VCA810
Other Parts Discussed in Thread: VCA820, TINA-TI

Hello,

I am trying to design a AGC circuit based on the VCA810. using the circuit shown in figure 36 of the datasheet, I was able to replicate the circuit in PSpice and simulate it. however, there isn't much info in the datasheet on how to calculate the circuit component values to tune the attack and release times for a specific need. Also, not sure how to calculate the value for V- although I think I understand it function. My requirements are a little different in that I need the input to handle 25mV to 1V, .constant output voltage swing of +/- 3 to 5 Volts, and input frequency of 900k to 1MHz. Also, not sure if the VCA820 may be more applicable to my need than the 810. Any help would be greatly appreciated.

 

Regards,

Wael