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AD8061 Driving load capacitance

Hello,

We have used ADV7123 DAC and also the corresponding buffer AD8061.

It is observed that display is proper when driven using DAC only and there is flicker in display when buffer is used.

We have the filtering circuit after the buffer.snap shot of the same is attached. Can you please let me know why flicker is seen and any method to reduce it.

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  • FormerMember
    FormerMember
Dec 8, 2021 +1 verified

With a scope, check the signal amplitudes including the depth of the sync pulse.  There might be an impedance mismatch between the 2 configurations.  Cannot tell unless I see more of the schematic.

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  • FormerMember
    +1 FormerMember
on Dec 8, 2021 9:24 AM

With a scope, check the signal amplitudes including the depth of the sync pulse.  There might be an impedance mismatch between the 2 configurations.  Cannot tell unless I see more of the schematic.

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  • FormerMember
    +1 FormerMember
on Dec 8, 2021 9:24 AM

With a scope, check the signal amplitudes including the depth of the sync pulse.  There might be an impedance mismatch between the 2 configurations.  Cannot tell unless I see more of the schematic.

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