AK4122A Datasheet, PDF (26/54 Pages) Asahi Kasei Microsystems – 24-Bit 96kHz SRC with DIR

■ Biphase Signal Input Circuit
[AK4122A]
75Ω
Coax
0.1uF
RX
75Ω
Figure 15. Consumer Input Circuit (Coaxial Input)
AK4122A
Note 19. Coaxial input only : if a coupling level to this input by the next RX input line pattern exceeds 50mV,
an malfunction may occur. In this case, it is possible to lower the coupling level by adding this
decoupling capacitor.
Note 20. Ground of the RCA connector and terminator should be connected to AVSS of the AK4122A with low
impedance on PC board.
Optical
Fiber
3.3V
O/E
Optical Receiver
470
RX
AK4122A
Figure 16. Consumer Input Circuit (Optical Input, Using 3.3V Optical Receiver)
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.
MS1076-E-01
- 26 -
2010/05