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Part Number: VCA821 Tool/software: Dear Specialists,
My customer is considering VCA821 and has a question.
I would be grateful if you could advise.
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In the case of analog VGA, the output voltage may fluctuate greatly due to noise in the gain adjustment…
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…
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: OPA820 , VCA820 , TINA-TI , OPA856
Hello Team, I am working with Automatic Gain controller on a high BW of 30MHz communication line.
For this application I have choose VCA821 VGA and OPA820 comparator…
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.
