I recently built a DAC using the DIR1701 receiver and PCM1730 DAC chip. It sounds great. I made two PCBs one for the receiver circuit and one for the DAC circuit.
What do you think is the best cable to use in order to pass the four signals (CLK, SCLK, DATA OUT, L/R clock) from the one board to the other. The distance is about 12 cm.
Should the cable be shielded and if so should I connect both ends to the ground (different grounds on different PCBs that have a single common point).
I have used a slim shielded cable and have connected only one end to receiver board ground, do you think there is a better way?
What do you think is the best cable to use in order to pass the four signals (CLK, SCLK, DATA OUT, L/R clock) from the one board to the other. The distance is about 12 cm.
Should the cable be shielded and if so should I connect both ends to the ground (different grounds on different PCBs that have a single common point).
I have used a slim shielded cable and have connected only one end to receiver board ground, do you think there is a better way?
To minimise EMI, it should be grounded at both ends. I would also advise using a series resistor to make the driving impedance the same as the cable. When doing so, make sure that you take into account the impedance of the circuit that is doing the driving, which is usually in the 20-30 ohm range for most CMOS families.
Jocko
Jocko
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