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The potentiometer is clear, but the 2. How does doing anything to pin 7 or pin 8 affect that?

(PDF) AN6884 Datasheet download

Email Required, but never shown. Sign up using Facebook. That is to say that the LEDs all come on at a much smaller turn of the potentiometer.

Fadecomic 2 6. There is also no discharge path with your arrangement. Pin 8 accepts a positive input voltage.

Post Your Answer Discard By clicking dattasheet 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. Passing Vin through a reverse capacitor seems to be potentially more prone to failure. That means there is a small current flow out from the pin.


AN6884 Datasheet

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I’m not reading it that way. Most people use “low” to refer to an6884 a lower voltage, or a lower position on the diagram. Per AN’d datasheet.

AN Datasheet PDF –

Can someone an688 what the reversed capacitor is doing here? I’m not following you. Per AN’d datasheetPin 8 is the signal input pin, and it’s the internal Op amp’s positive input. This circuit will light the LEDs as the input voltage on pin 8 increases relative to pin 7. Vref is the high side of the 5 LED comparators in the datasheet block diagram.

Home Questions Tags Users Unanswered. Post as a guest Name. If I “correct” the orientation, the circuit does not work at all.

AN Datasheet(PDF) – Panasonic Semiconductor

You might want to edit to explain your answer a bit more. However, if that’s the case, I can’t explain why reversing the capacitor doesn’t work, unless the actual polarity of the capacitor is backwards from what you think it is.

It appears to be reversed. Setting 7 higher than zn6884 biases the low side of the comparators, allowing them to turn on with a lower output from the amp.

It’s the DC bias determine the polarity. Reverse biased capacitor on IC input pin Ask Question. Capacitor with polarity can be used ac couple or blocking. Sign up or log in Sign up using Google. To be clear, removing the capacitor doesn’t light up the LEDs all at once. It sounds like you’re trying to drive this circuit with a signal that includes a considerable DC bias, which explains why all of the LEDs light up right away when you remove short out the capacitor. So it determines the DC bias of the block capacitor’s polarity.


The diode will mess up the response of the chip due to its forward voltage drop. Pin 8 is the signal input pin, and it’s the internal Op amp’s positive input. I will be certain to use them here from now on. I am looking at the test circuits on the data sheet for the AN VU meter IC, and I cannot understand the connection to pin 8 in the following diagram: Very confusing terminology, since the inverting input can have a higher voltage than the noninverting input.

Indeed, it must in order for any of the LEDs to turn on!