Part Number: VCA821 Hello Nick,
What is the exact gain formula of VGA820 with respect to control voltage. I have gone through the datasheet but couldn't get the problem formula with correlates gain with control voltage.
Could you please help me out…
Part Number: VCA821 Other Parts Discussed in Thread: TINA-TI Hello I want to use VCA821 to design the input DC signal range in 0-1v or 0-2v Through the DAC input control chip pin Vg to achieve the output range of 0-3.3V, VCA chip power supply ± 5v Look…
Part Number: VCA821 I design VCA821 for RF gian.
But I find VCA821 with temperature sensitive in this case,do you meet kind of problem before?
For detail,we power on the board with vca821(temperature at about 25°), after a while , temperature at abou…
Hi Harshini,
I apologize for the late reply. I was working on your circuit but was running into issues with signals 1MHz and above and stability when using faster parts. It appears that you have fixed the configuration to meet the speeds of your signal…
Part Number: VCA821 Other Parts Discussed in Thread: LMH6518 , LMH6881
Hi team,
My customer is considering alternative device to VCA821 that can adjust the gain from the digital signal. I searched TI.com and found out LMH6518. But LMH6518's slew rate…
Part Number: VCA821 Hi Team,
Is there any difference between the VCA821 on the EVM and the VCA821 on the official website? Do they all meet RoHS? Thanks.
Regards,
Charlie
Part Number: VCA821 Hello team,
The D/S Table 2 specifies that RG = 18Ohm when G=40 (use case is AVMAX=32dB).
Figure 1 specifies that differential input voltage level should be close to 0.1Vpp when RG=18Ohm.
Is the input voltage level limited to 0.1Vpp…
Hi Jacob,
Thank you for your response here. I have tried VCA821/VCA820, these two device can not realize the function I mentioned here. Does TI do not have such VCA to realize below requirement?
Vs=+/-5V, Vppmax=2V, frequency=30MHz, AVmax=40dB;
When…
Part Number: VCA821
Hello,
I think there is something wrong in the picture of datasheet, Is there someone who have succeed simulating the circuit of this picture? I simulated this circuit with Multisim,but can't achieve the function of AGC.
Part Number: VCA821 Other Parts Discussed in Thread: OPA820
Hello, Refer to the VCA data manual (Figure 1), and design the automatic gain control circuit (Figure 2) in Multisim for simulation experiments. Constantly adjust the size of the…