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(PDF) AN6884 Datasheet download

There’s still a much shorter range over which a varying number of LEDs come on. I’m not reading it that way. That means there is a small current flow out from the pin. 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. So it determines the DC bias of the block capacitor’s polarity.

Dattasheet circuit will light ah6884 LEDs as the input voltage on pin 8 increases relative to pin 7. Sign up or log in Sign up using Google.

As displayed, the Datawheet go from fully off to fully on over roughly the entire turn range of the potentiometer. 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: Sign up using Email and Password. Sign up using Facebook. Indeed, it must in order for any of dxtasheet LEDs to turn on!

You should fix the capitalisation of sentences and electrical units ‘F’ for farad to improve legibility and qn6884. I will be certain to use them here from now on. Very confusing terminology, since the inverting input can have a higher voltage than the noninverting input. It appears to be reversed. Your description doesn’t agree with that in the datasheet. This makes sense, but why not a diode?


Pin 8 accepts a positive dattasheet voltage.

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

(Datasheet) AN pdf – 5-Dot LED Driver Circuit (1-page)

It’s the DC bias determine the polarity. Vref is the high side of the 5 LED comparators in the datasheet block diagram. To be clear, removing the capacitor doesn’t light up the LEDs all at once. By using our datashdet, you acknowledge that you xatasheet read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

If Datasheett remove the 2. If I “correct” the orientation, the circuit does not work at all. That’s clear, because the input in my test circuit is DC. 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. I know the correct names, but I conversely find “inverting” and “noninverting” confusing when dealing with comparators, since those terms make more sense when dealing with op-amps.

Pin 7 is the output of the internal amplifier, and pin 8 is its input, designed aj6884 accept a low-level AC input 57 mV for a 0-dB indication. Post as a guest Name. Setting 7 higher than ground biases the low side of the comparators, allowing them to turn on with a lower output from the amp.

Reverse biased capacitor on IC input pin Ask Question. Home Questions Tags Users Unanswered. 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.

Pin 8 is the signal input pin, and it’s the internal Op amp’s positive input. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of datasheeyprivacy policy and cookie policyand that your continued use of the website is subject to these policies.


There datashfet also no discharge path with your arrangement. Email Required, but never shown. Right, I get that pin 7 is the output of the amp, but it’s part of the negative feedback loop on the amp. By “low side”, you’re referring to the inverting inputs of the comparators. Have you tried a non-polarized capacitor e. The LED pins connect to the negative side of the LEDs, and the pins go low when the output of the internal amp goes above Vref dropped by voltage dividing resistors at each comparator.

You might want to edit to explain your answer a bit more. I’m not dataheet you. datqsheet

Post Your Answer Discard 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.

Per AN’d datasheet. That is to say that the LEDs all come on at datawheet much smaller turn of the potentiometer. Most people use “low” to refer to either a lower voltage, or a lower position on the diagram.

Capacitor with polarity can be used ac couple or blocking. Datahseet potentiometer is clear, but the 2. It just shortens the range of turn over which the potentiometer works. Per AN’d datasheetPin 8 is the signal input pin, and it’s the internal Op amp’s positive input. Can someone explain what the reversed capacitor is doing here? How does doing anything to pin 7 or pin 8 affect that?