In ADV7401, video quality is degraded over a period of time

Hi,

we have used ADV7401 in our design for capturing of Composite video.

Initially, the output video is good but over a period of time the video quality is degraded, video consists black lines. We need support to resolve the issue.

In ADV7401 datasheet, we found part nos ADV7401BSTZ-110 and ADV7401WBSTZ-110, what is the difference between the two.

Is automobile grade available in ADV7401.

BR

satya

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  • 0
    •  Analog Employees 
    on Feb 13, 2020 4:45 PM

    The 'W' specifies an automotive product.  Means the chip went through more testing to be truly rated as automotive.

    First you need to determine what's changing over time

    • Thermals,  Try freeze spray when failing to correct the problem.  Also the temperature of the ELPF caps can be a problem is the caps are X7R material.  They should be NPO material for stability of temperature.
    • Are the power rails getting noisier?  Especially PVDD?
Reply
  • 0
    •  Analog Employees 
    on Feb 13, 2020 4:45 PM

    The 'W' specifies an automotive product.  Means the chip went through more testing to be truly rated as automotive.

    First you need to determine what's changing over time

    • Thermals,  Try freeze spray when failing to correct the problem.  Also the temperature of the ELPF caps can be a problem is the caps are X7R material.  They should be NPO material for stability of temperature.
    • Are the power rails getting noisier?  Especially PVDD?
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