AK4103A_09 AKM [Asahi Kasei Microsystems], AK4103A_09 Datasheet - Page 19

• Manufacturer Part Number: AK4103A_09
• Description: 192kHz 24-Bit DIT
• Manufacturer: AKM [Asahi Kasei Microsystems]

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There is an RS422 line driver on chip. The AES3 specification states that the line driver shall have a balanced output
with an internal impedance of 110 ohms ±20% and also requires a balanced output drive capability of 2 to 7 volts peak-
to-peak into 110 ohm load. The internal impedance of the RS422 driver along with a series resistors of 56 ohms realizes
this requirement. For consumer use(S/PDIF), the specifications require an output impedance of 75 ohms ±20% and a
driver level of 0.5±20% volts peak to peak. A combination of 330 ohms in parallel with 100 ohms realizes this
requirement. The outputs can be set to ground by resetting the device or a software mute.
MS0251-E-01
Line Driver
TXP
TXN
TXP
TXN
Figure 17. Professional Output Driver Circuit
Figure 18. Consumer Output Driver Circuit
330
56
100
0.1u
0.1u
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Transformer
Transformer
XLR Connector
RCA Phono
Connector
[AK4103A]
2009/01