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Are the AC and DC switches closed at the same time? In reply to Matt Guibord:. Input to analog switch in DC path 5.

[Resolved] TLC – Data converters forum – Data converters – TI E2E Community

I would expect the input impedance at DC to be greater than 10 kOhm. Therefore you need to bias the ADC at 1. In reply to lei gong: Go to Support forums. We are glad that we were able to resolve this issue, and will now proceed to close this thread.

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I’m assuming the 1. You mentioned that the circuit was working fine but now it’s not working. TI, its suppliers and providers of content tllc5540 the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.

At pin 5 of U12, the input swings between 10mV and 3. If only the DC path is the issue, can you verify flc5540 voltage at pin 7? If you have a related question, please click the ” Ask a related question ” button in the top right corner.

This thread has been locked. Menu Search through millions of questions and answers User. No license, either express or implied, by estoppel or otherwise, is granted by TI. These were taken with an input signal of 1Vpp applied to the circuit.

The clock should swing from 0 to 5 V. Content on this site may contain or be subject to specific guidelines or limitations on use.

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Best regards, Jim Tc5540. Hi Matt, My apologies for the ambiguities in the problem statements above. Ask a new question Ask a new question Cancel.

Video input to AD 2. This information will tell us if the amplifier and analog switch are working properly, and how much current is flowing from the ADC input through R Yes, that is correct.

Hi Avinash, I guess I’m confused here – note that I am not an expert on analog video signals This, in turn, is causing errors in the data captured by the ADC. In reply to Avinash Mohan: In reply to Matt Guibord:. The ADC input still shows the 1.