You said you could design it. You did but datasheet standard so almost nothing different from the cheap designs AND an error. The assumption (proven by testing and modding cheap devices) is that the IC is capable of more so it would be nice to have a non compromise design with high quality in mind. My intention was to join forces and have it best of class. You did not get that.
As you can conclude from the examples I gave I can design it but .. I won't draw it as, like you, I think the IC is not for DIY. When I can't solder it myself I skip it. Where you are things are different from here and possibilities are in abundance and at lower cost. So it would be most efficient to have it produced where you are and you are a fast designer so win win.
As you can conclude from the examples I gave I can design it but .. I won't draw it as, like you, I think the IC is not for DIY. When I can't solder it myself I skip it. Where you are things are different from here and possibilities are in abundance and at lower cost. So it would be most efficient to have it produced where you are and you are a fast designer so win win.
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I am not a qualified businessman.
I recommend that everyone try not to use DAC. It's meaningless.
I also recommend that everyone not buy expensive operational amplifiers. It makes no sense.
I also recommend that most people do not make more than two power amplifiers. It makes no sense.
I don't seem to be a qualified businessman.
😛
I even want to advise everyone not to use class D.
If you must use class D. It is suggested that it should have a power of 100-200 watts. Dual voltage. Low distortion.
In fact, what I said may make all businessmen unhappy.
I even own shares in Texas Instruments. ha-ha.
Should a separate power supply/regulator for analoge(pin 17)and digital(pin 55)part of the ma12070 lower distortion/noise?
The analoge inputs have a 2.5V offset. You need always the 10uf Coupling capacitor(or use transformer)Also with unbalanced input. Otherwise you make a shortcut between offset voltage and analoge ground. Not recommend for the ma12070.
With 14k minimum input impedance at highgain you can use a 1uf mkp.
The analoge inputs have a 2.5V offset. You need always the 10uf Coupling capacitor(or use transformer)Also with unbalanced input. Otherwise you make a shortcut between offset voltage and analoge ground. Not recommend for the ma12070.
With 14k minimum input impedance at highgain you can use a 1uf mkp.
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It should be separated as it is 5V and 26V. A clean low noise 5V gives better results. The 26V is less critical.
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I mean the 5V supply has two connections one for analoge and one for digital, i am used to give them each a regulator/supply so that there is no interference between analog and digital.
But maybe we will notice no difference because the chip has internal regulators for analog and digital part who mess up the clean external supply.
And right further we need the 19 tp 26V main analoge supply.
But maybe we will notice no difference because the chip has internal regulators for analog and digital part who mess up the clean external supply.
And right further we need the 19 tp 26V main analoge supply.
Good one, just looked at the pins and you are right. These are connected and I have not separated them. Maybe it will become better when having separate 5V supplies but then with antiparallel diodes between the pins (just in case). Now they are connected and a better 5V improves matters already.
So 2 x 5V with LT3045 for instance. Maybe a package can be chosen that is more easy to solder. LT1084/LT1083 for 19 ...26V?! I will go with transformers and caps for unbalanced to balanced conversion. It would not hurt to have opamp pads on the PCB for unbalanced-bal with opamps. Makes it more versatile. Four extra input caps but 90 degrees rotated and you are there. Not intrusive when not used.
So 2 x 5V with LT3045 for instance. Maybe a package can be chosen that is more easy to solder. LT1084/LT1083 for 19 ...26V?! I will go with transformers and caps for unbalanced to balanced conversion. It would not hurt to have opamp pads on the PCB for unbalanced-bal with opamps. Makes it more versatile. Four extra input caps but 90 degrees rotated and you are there. Not intrusive when not used.
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With transfomer you do not need the caps because offset is for both inputs 2.5VDC. There wil be no current flow when input is 0Vrms. Using an opamp needs another power supply.