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PCB is designed for using only one side with two wire junctions in Eagle 5 application. Output impedance will be about 72R. For transferring of digital audio within equipment is much better I2S bus. I built circuit in two copies and both works on first connection.

Advantage of interface is that only one wire is needed for transferring of adtasheet audio signal.

From top side are wire junctions, buttons, inductor, crystal and remaining connectors. It should work too volume settings using buttons. All three transfer methods have identical signal encoding and we can soever convert between them. This I must more inspect.

Transfer speed is taken from sample frequency, number 755176b bits and number of channels.

75176b datasheet ePub download

Schematics and PCB was a little changed. Almost all components and USB connector are placed from bottom side. It is simultaneously disadvatage, because receiver must reconstruct clock signal from data with PLL and there can rise jitterwhich is heared like a small distortion on the output of DAC.


Both use same protocol with few exceptions. Just it isn’t HiFi, but for most people will datqsheet quality of sound output sufficient. Effect is, that almost all pins are shorted.

There exists too professional variant AES3. B output from B we leave unconnected. Circuit includes these components: Next I must use copper solder wick for draining of tin out. Circuit should work immediately after connection to computer. These components I solder that after right position I hold them with nail, small screwdriver or tweezer.

B (TI) PDF技术资料下载 B 供应信息 IC Datasheet 数据表 (1/21 页)

Headphone output uses standard 3. First I drill holes for crystal, wires, connectors and buttons. Schematics is almost identical to PCM datasheet. This makes symmetrical output with impedance about R.

If the component dataseet on the right place, I solder them on the opposite side and finally on the first side. Next I solder SMD connector, wire junctions and finally all components from a top side.

Analog output has a good sound without datasheef and he is better than usual internal soundcards on PC motherboards. If there are anough colophony that pins automatically unjoin thanks to surface tension.


I put circuit on right place, solder one pin in the corner and next solder all pins on second side with thin tin. Next I solder first side. Connector is usually XLR with three pins with central third datashfet connected to the ground.

Shield wire we connect with SMD jumper to the ground. Low and middle frequencies are perfect, but highes frequencies are a little blurred.

Schematics diagram schematics version 1. I tried to separate analog part from digital and right place ground wires to eliminate interferences. One pin I solder with small amount of tin. It is seen as standard USB soundcard. For usual operating systems like Linux or Windows XP are not needed any drivers.

PCB is designed for easy creating in amateur conditions. Component view Printed circuit board PCB is designed for using only one side with two wire junctions in Eagle 5 application. Circuit description Schematics is almost identical to PCM datasheet.

We can use too 3 HID buttons 751766b setting volume and mute.