AK4113_1 Datasheet, PDF (23/49 Pages) Asahi Kasei Microsystems – 192KHZ 24BIT DIR WITH 6:1 SELECTOR

ASAHI KASEI
[AK4113]
„ Bi-phase signal input/output circuit
75Ω
Coax
0.1uF
RX
75Ω
0.47nF
Note _AK4113
Figure 17. Consumer Input Circuit (Coaxial Input)
Note: For coaxial input, if a coupling level to this input from the next RX input line pattern
exceeds 50mV, there may be an incorrect operation. In this case, it is possible to
lower the coupling level by adding this decoupling capacitor.
Optical
Fiber
Optical Receiver
O/E
470
RX
AK4113
Figure 18. Consumer Input Circuit (Optical Input)
For coaxial input in serial mode, the input level of RX line is small, so care must be taken to avoid crosstalk among the
RX input lines. In this case, a shield is recommended between the input lines. In parallel control mode, two channel
inputs (RX1 and RX5) are available, RX2, RX3, RX4 and RX6 change to other pins for mode settings. Those pins must
be fixed to “H” or “L” because they are not normal logic input.
The AK4113 includes the TX output buffer. The output level meets combination 0.5V± 20% using the external resistor
network. The T1 in Figure 19 is a transformer of 1:1.
R1
TX
DVSS
R2
75Ω cable
T1
Figure 19. TX External Resistor Network
Vdd R1 R2
3.3V 240Ω 150Ω
3.0V 220Ω 150Ω
MS0349-E-02
- 23 -
2005/08