![[Under Construction]](images/undercon.gif){kind=small}
TDA1543 battery-powered DAC
INTRODUCTION
I had this board lying around for some time, not knowing what to do with it as I couldn't find some of the chips that were obsolete. Until 1 day when a friend passed me the chips to try out.
DESCRIPTION
This DAC is based around the Phillips TDA1543 chip, an 8-pin wonder that decodes stereo 16-bit channels. The SPDIF decoding is done by the Crystal Semiconductor CS8412 receiver. The receiver is coupled directly to the DAC, there is no digital filter involved. In common terms, this is called non-oversampling. Apart from a few discrete regulators and bypass capacitors sprinkled across the board, it is really as simple as it gets.
The main regulator is a LM317 which is adjusted to about 6v for the DAC chips. Some claim that the chip sounds better at higher voltages, but as the temperature of the DACs reached 60°C, I decided to leave it at that.
Since this DAC is small and consumes little power, I opted to use a 12v SLA battery as the power source. Everything fitted nicely into a small plastic box.
SOUND QUALITY
Under construction!!
PICTURES
