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TonyEErocketscientist You were rocket my apologize, adding a load fixed the offset issue. What’s the leakage current spec on the 1mF cap?
Voltage output swing is spec’ed in the datasheet for a load of 10, ohms figs 17, So what is the load? To minimise the leakage it needs to be properly biased about half its rated voltage so that the electric field builds up the insulating layer by A load resistance of a few kilohms will reduce the DC output to a few millivolts Or replace the capacitor with a lower leakage type film cap or ceramic.
Dual Audio Operational Amplifier
Email Required, but never shown. But that makes a lot of more sense, thank you so much for shedding some light.
Other parameters, for a load of 2 kilohms Power BW page 3, figs 6,7,8 and others. If the resulting DC bias is a problem, there are dataheet options:.
National Semiconductor – datasheet pdf
An oscilloscope is only connected to the output, i double checked, but its on the board board with many components on it, maybe that could be it? If it’s really 1 mF uF it’s an electrolytic capacitor, which WILL leak a few microamps, depending on age, temperature, and bias voltage. If a lower one would be used it will attenuate the signal at the output. The reasoning I am using such a high value capacitor is due to datsaheet high pass nature it creature with the load, the higher I use the likely hood it will pass all the output signal to the output stage.
Increase the load to 2 kilohms. Post as a guest Name.
LMN Datasheet(PDF) – STMicroelectronics
What happens if you put a K pull-down on the output? Home Questions Tags Users Unanswered.
The clue is in its name And what do you mean by VOM? I have a load currently of 10ohms, it removes the DC offset however the Voltage pkpk severely drops oppose to taking it out.
If the resulting DC bias is a problem, there are 2 options: Sign up or log in Sign up using Google. Caps hold a charge voltage if there is no load. datashfet
It will be utterly hopeless driving 10 ohms. Capacitor allowing DC through?