Is it possible to use it instead of a MAX9812H circuit..? https://datasheets.maximintegrated.com/en/ds/MAX9812-MAX9813L.pdfYes, but some comments overe here on G vs Distortion for the TL081.
Of course you can use it; just about ANY operational amplifier can be used as a microphone amplifier, given an appropriate circuit and appropriate power supply voltages. The only question is, how well will it perform and will the resulting amplifier meet your requirements. Any part you choose, TL081 or otherwise, will have its strengths and its weaknesses, and it may or may not meet your needs.Can we use the TL081 integrated circuit as a microphone amplifier?
The two additional stages are to convert the sine signal to a square one.. i'm not sure how i can wire TL081 along with the components before it and whether i should add anything else. Also, the power voltage is 5V as shown in the picture, (9V going through a regulator)Summarizing other comments, and adding my own opinion, certainly the TL081 will function as a microphone amplifier. I do not understand why you would add two additional stages after the amplifier , as shown in post #5, since the gain can be as much as you choose. The TL071 series does offer a lower noise voltage and if the system will have much low frequency response then that would be a better choice. As for needing a bipolar power supply, it is a simple matter to provide a mid-supply reference voltage for the inputs, and run the device from a single supply of 10 volts, or a 9 volt battery if battery power is used.
Make sure you get a real, not counterfeit, TL072 if you try it. I bought a batch of counterfeit TL072’s on ebay not knowing they were fakes. The performance of the fakes was not as good as a real TL072. Buy from a reputable source.From what I learnt by reading Audioguru's post in many different forums, a better one is the TL072 (selected by its better (lower noise) figures.
The TS has only a single +5V supply available, and the TL07x series has the same minimum supply voltage requirements as the TL08x series: +/- 5V minimum, so it would not work for him.Make sure you get a real, not counterfeit, TL072 if you try it. I bought a batch of counterfeit TL072’s on ebay not knowing they were fakes. The performance of the fakes was not as good as a real TL072. Buy from a reputable source.
How about TI TLC272? The TLC272C is supposed to go down to only 3V minimum supply voltage.The TS has only a single +5V supply available, and the TL07x series has the same minimum supply voltage requirements as the TL08x series: +/- 5V minimum, so it would not work for him.
It would function, though it is quite noisy at low frequencies (see data sheet, Figure 37 on page 28). It might suffice for your application, although I certainly wouldn't want to use it in a demanding audio application with a dynamic mic having a low output voltage.How about TI TLC272? The TLC272C is supposed to go down to only 3V minimum supply voltage.
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