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Original question:

VSP1000: output of vsp1000 getting attenuated

VSP1000: Bot getting proper output

VISHAL KALWANI
Intellectual 705 points
Part Number: VSP1000

Hi

In vsp1000 my configuration are vcc12v Ridrv 150K and Risf is 150k.

I am applying 1v peak to peak and offset of 4v from function generator.

Making it on 10 times I am seeing 5 times it give 1v peak to peak. And 5 times 0.5v peak to peak.And At input I am able to see 1v peak to peak.

So please let me know why this is happening.

  • 0
    TI__Mastermind 49956 points

    Hello Vishal,

    Thanks for reaching out.
    This product has limited direct TI design support, and unfortunately, we are not able to answer your specific question.
    You may be able to find the answer in existing collateral or by searching existing forum threads.

  • 0 in reply to Praveen Aroul
    Intellectual 705 points

    This product is still available. And it is manufactured by TI. So it is time responsibility to slove this problem.

  • 0 in reply to VISHAL KALWANI
    TI__Mastermind 49956 points

    Hi Vishal,

    1. Can you please clarify if the issue is noticed across multiple devices/boards or just 1 device?

    2. Can you sweep the offset voltage and find out the attenuation factor? Based on your previous posts, it seems like, at 4V, the attenuation is 10x and at 8V, the attenuation is 2x. Is this correct? Please provide the data for the other offset voltages by sweeping the offset voltages between 0 and 8V. Also for the offset sweep voltages, please measure the supply current ICC and VDRV (voltage at  IDRV pin).