Part Number: VCA820 Other Parts Discussed in Thread: OPA695 , OPA820 , Hello Kai,
I working for AGC network which works for 30ns to 200ns for that purpose I have implemented VCA820 circuit with OPA695 and OPA820 for feedback integrator, but I couldn…
Part Number: VCA824 Other Parts Discussed in Thread: VCA820 , Tool/software: When I navigate to the PGA/VGA page
https://www.ti.com/amplifier-circuit/pga-vga/products.html
I don't see VCA820 or VCA 824 anymore (they were there last week). Why not…
Part Number: VCA820 Hi team,
I want to use this device as below, Rf=845Ohm, Rg=16.9, Vg=2V, which means Avmax=40dB;
When I apply VG1 signal, Vpp=5mV, f=20MHz, we can see that Vpp of VF1 is about 700mV. This is not aligned with the gain*Vpp=500mV.…
Other Parts Discussed in Thread: VCA820 , TINA-TI Dear all
My customer is evaluating VCA820, they will provide a high frequency voltage(around 30MHz or even higher) to VCA820, so they want to know how long it will take for the VCA820 to change its…
Hi Kazuhiko,
Yes, the Vctrl0 and Vslope in the VCA820/VCA821 datasheet are constants to estimate gain deviation for different gain control voltages and their units are voltage (V). The below plot in the datasheet with the equation provides the use case…
Other Parts Discussed in Thread: VCA822 , LMH6505 , VCA820 , OPA820 What happens with the VCA820 or VCA822 if the Gain Control (Vg) voltage falls out of the normal operating range of 0V to 2V (For VCA820) and -1V to 1V (For VCA822)? The LMH6505 warns…
I have no idea.
We are just trying to find out where the problem is. If the VCA820 model works in the TINA-TI reference circuit but the SPICE model is not working in the circuit that you drew in another circuit simulation software product, it will…
Other Parts Discussed in Thread: VCA820 Hi,
I was trying to use the variable gain amplifier VGA820 as an AGC, and thought i should simulate in PSPICE first. I downloaded the macromodel from TI website and the simulation won't run. It came up with the…
Other Parts Discussed in Thread: VCA820 I am looking at the VCA820 and needed some clarification on load handling capability. The description notes that this will "easily drive doubly-terminated 50 W lines... over the ±3.9V output voltage range". Is this…
