AK4584_01 Datasheet, PDF (24/53 Pages) Asahi Kasei Microsystems – 24Bit 96kHz Audio CODEC with DIT/DIR

ASAHI KASEI
„ Biphase signal input/output circuit
[AK4584]
75Ω
Coax
0.1uF
RX
75Ω
AK4584
Figure 5. Consumer Input Circuit (Coaxial Input)
Note 1: Coax input only : if a coupling level to this input from the next RX input line
pattern exceeds 50mV, an incorrect operation may occur. In this case, it is possible to
lower the coupling level by adding this decoupling capacitor.
Note 2: Ground of the RCA connector and terminator should be connected to PVSS of the AK4584
with low impedance on PC board.
Optical
Fiber
Optical Receiver
O/E
470
RX
AK4584
Figure 6. Consumer Input Circuit (Optical Input)
When using coaxial input, the input level of the RX line is small. Care must be taken to reduce, crosstalk among RX input
lines by inserting a shield pattern between them.
The AK4584 includes a TX output buffer. The output level is 0.5V, +/−20% using the external resistor network shown
below. The T1 in Figure 7 is a 1:1 transformer.
330
TX
100
75Ω cable
DVSS
T1
Figure 7. TX External Resistor Network
MS0118-E-00
- 24 -
2001/11