tyre
100+ Head-Fier
- Joined
- Oct 9, 2004
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Here's my noob attempt at a TPA6120 based headphone amplifier. Here's the schematic. It's similar to the THS6012 preamp schematic in this article by Rod Elliot, although somewhat simplified.
The pcb dimensions are 1.7" by 1.3". That might actually be too small of a board area for the TPA6120 to efficiently dissapate heat though. For the power supply, I'll probably end up getting two TREAD's and connecting them together in order to get the necessary dual supply.
I've read in various posts that there's less distortion when the TPA6120 is used in an inverting configuration, like in the peranders' QRV-07 amp, although I'm not really sure where that comes from as I have read through the TPA6120 and THS6012 datasheets and didn't see any different distortion figures given for the two inputs. The TI evaluation module uses non-inverting inputs, so I did the same.
edit: I forgot to mention that all the surface mount resistors and capacitors are the 1206 package for easier soldering. The two input buffers are standard pinout SOIC opamps.
The pcb dimensions are 1.7" by 1.3". That might actually be too small of a board area for the TPA6120 to efficiently dissapate heat though. For the power supply, I'll probably end up getting two TREAD's and connecting them together in order to get the necessary dual supply.
I've read in various posts that there's less distortion when the TPA6120 is used in an inverting configuration, like in the peranders' QRV-07 amp, although I'm not really sure where that comes from as I have read through the TPA6120 and THS6012 datasheets and didn't see any different distortion figures given for the two inputs. The TI evaluation module uses non-inverting inputs, so I did the same.
edit: I forgot to mention that all the surface mount resistors and capacitors are the 1206 package for easier soldering. The two input buffers are standard pinout SOIC opamps.