CDB42518 Cirrus Logic Inc, CDB42518 Datasheet - Page 81

• Manufacturer Part Number: CDB42518
• Description: BOARD EVAL FOR CS42518 CODEC
• Manufacturer: Cirrus Logic Inc

Specifications of CDB42518

• Main Purpose: Audio, CODEC
• Embedded: Yes, FPGA / CPLD
• Utilized Ic / Part: CS42518/16
• Primary Attributes: 6 Single-Ended Analog Inputs and 8 Outputs, S/PDIF Digital Audio Transmitter and Receiver
• Secondary Attributes: GUI, I2C, SPI Interfaces
• Product: Audio Modules
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1502

DS584F1
11.APPENDIX D: EXTERNAL AES3-S/PDIF-IEC60958 RECEIVER
11.1 AES3 Receiver External Components
COMPONENTS
Coax
The CS42518 AES3 receiver is designed to accept only consumer-standard interfaces. The standards call
for an unbalanced circuit having a receiver impedance of 75 Ω ±5%. The connector is an RCA phono socket.
The receiver circuit is shown in
plexer using the consumer interface.
In the configuration of systems, it is important to avoid ground loops and DC current flowing down the shield
of the cable that could result when boxes with different ground potentials are connected. Generally, it is
good practice to ground the shield to the chassis of the transmitting unit and connect the shield through a
capacitor to chassis ground at the receiver. However, in some cases, it is advantageous to have the ground
of two boxes held at the same potential and make the electrical connection through the cable shield. Gen-
erally, it may be a good idea to provide the option of grounding or capacitively coupling the shield to the
chassis.
When more than one RXP pin is driven simultaneously, as shown in
crosstalk between inputs. To minimize this crosstalk, provide as much trace separation as is reasonable and
choose non-adjacent inputs when possible.
The circuit shown in
TTL/CMOS logic outputs drive the CS42518 receiver input.
75
Ω
Figure 31. Consumer Input Circuit
RCA Phono
75
Ω
Figure 33
TTL/C M O S
0.01
µ
F
G ate
Figure 33. TTL/CMOS Input Circuit
may be used when external RS422 receivers, optical receivers or other
Figure
RXP0
31.
Figure 32
0.01
µ
F
shows an implementation of the Input S/PDIF Multi-
Coax
75
Coax
Coax
75
75
Ω
Ω
Ω
Figure 32. S/PDIF MUX Input Circuit
R X P0
75
75
75
Ω
Ω
Ω
Figure
.01
.01
.01
32, there is a potential for
µ
µ
µ
F
F
F
RXP7
RXP6
RXP0
.
. .
CS42518
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