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Most people use “low” to refer to either a lower voltage, or a lower position on the diagram. Home Questions Tags Users Unanswered. I’m not reading it that way.

AN6884 Datasheet PDF

Pin 8 accepts a positive input voltage. Per AN’d datasheetPin 8 is the signal input pin, and it’s the internal Op amp’s positive input. Very confusing terminology, since the inverting input can have a higher voltage than the noninverting input. Indeed, it must in order for any of an6884 LEDs to turn on!

There is also no discharge path with your arrangement.

Per AN’d datasheet. To be clear, removing the capacitor doesn’t light up the LEDs all at once. I will be certain to use them here from now on. You might want to edit to explain your answer a bit more.


I’m not following you. So it determines the DC bias of the block capacitor’s polarity. Have you tried a non-polarized dahasheet e. Reverse biased capacitor on IC input pin Ask Question. That’s clear, because the input in my test circuit is DC.

AN Datasheet(PDF) – Panasonic Semiconductor

Post as a guest Name. That is to say that the LEDs all come on at a much smaller turn ann6884 the potentiometer. You should fix the capitalisation of sentences and electrical units ‘F’ for farad to improve legibility and credibility. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

If I “correct” the orientation, the circuit does not work at all. Right, I get that pin 7 is the output of the amp, but it’s part of the negative feedback loop on the amp. Setting 7 higher than ground biases the low side of the comparators, allowing them to turn on with a lower output from the amp. How does doing anything to datasheeet 7 or pin 8 affect that?


5+1 led vu-meter with AN6884

If I remove the 2. It just shortens the range of turn over which the potentiometer works. Vref is the high side of the 5 LED comparators in an688 datasheet block diagram.

Pin 8 is the signal input pin, and it’s the internal Op amp’s positive input. Placing it at a higher voltage within the datasheet’s max specified V will both lower the amplification and raise the lower rail of the comparators in the block diagram.

Passing Vin through a reverse capacitor seems to be potentially more prone to failure. The diode will mess up the response of the chip due to its forward voltage drop.

(PDF) AN Datasheet PDF Download – 5-Dot LED Driver Circuit

Fadecomic 2 6. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. By “low datashfet, you’re referring to the inverting inputs of the comparators.