I have designed a TPA6120 based headphone amplifier. As input buffer I have chosen the expensive precision opamp AD8610 as input buffer.
Datasheets for the TPA6120a says:
0.000021% distortion
1300 v/us slew rate
2 uV noise
126 dB S/N
0 Hz- 160 MHz!!
700 mA out!!
The smallest parts are 0805 so it's not so hard to solder.
The input capacitor is made of PPS Metallized Polyphenylene Sulfide which is a heavy duty part for the automotive industry.
The documentation is 3 MB so it isn't possible to upload it here but send me an email and you'll get it from me. Notice, an EMAIL, not a personal message since you don't have your email address there.
Datasheets for the TPA6120a says:
0.000021% distortion
1300 v/us slew rate
2 uV noise
126 dB S/N
0 Hz- 160 MHz!!
700 mA out!!
The smallest parts are 0805 so it's not so hard to solder.
The input capacitor is made of PPS Metallized Polyphenylene Sulfide which is a heavy duty part for the automotive industry.
The documentation is 3 MB so it isn't possible to upload it here but send me an email and you'll get it from me. Notice, an EMAIL, not a personal message since you don't have your email address there.
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I might consider a group buy if the interest is there.
BTW: How does it sound?
It's extremely clear, razor sharp, and it's not suitable for bad mp3 files since the amp will reveal every artifact in the music and recording. I think the guys over at head-fi.org can come up with better words. I'm pleased.
BTW: How does it sound?
It's extremely clear, razor sharp, and it's not suitable for bad mp3 files since the amp will reveal every artifact in the music and recording. I think the guys over at head-fi.org can come up with better words. I'm pleased.
I think you can see the difference besides a tuned pcb pattern. The pcb is 100 x 160 mm and will fit in many cases.
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Thanks. This was my first SMD project, I learn as I go.. Few more of these and I can do brain surgery too 🙂
I am in for at least one pcb maybe more. With minimum order requirements for some of the parts I should have almost enough for 2 boards.
cobretti,
can you give me a p/n or link to those transformers. I found these at mouser and am hoping they will work.
030-7330-0 Pulse Audio & Signal Transformers
Thanks,
Bryant
cobretti,
can you give me a p/n or link to those transformers. I found these at mouser and am hoping they will work.
030-7330-0 Pulse Audio & Signal Transformers
Thanks,
Bryant
The suggested transformer seems to fit.
The answer about the coupling cap at the input: The footprint is for a 2220, a PPS Metallized Polyphenylene Sulfide cap from RIFA. The Farnell article number in my BOM goes to a 1210 cap with PEN dielectricum. Farnell hasn't got any PPS caps.
The answer about the coupling cap at the input: The footprint is for a 2220, a PPS Metallized Polyphenylene Sulfide cap from RIFA. The Farnell article number in my BOM goes to a 1210 cap with PEN dielectricum. Farnell hasn't got any PPS caps.
Thanks Peranders.
I was hoping that would work, price is good too. I will make sure and look for PPS caps in 2220 size.
I was hoping that would work, price is good too. I will make sure and look for PPS caps in 2220 size.
Yes, I used exactly these transformers. It was kinda difficult to find them but I wasn't worried since the US is so big market 🙂
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