AK4613 Datasheet, PDF (30/69 Pages) Asahi Kasei Microsystems – 4/12-Channel Audio CODEC

[AK4613]
■ Differential / Single-End Input selection
The AK4613 supports the differential input (Figure 19) by setting DIE1-2 bits = “1”, supports the single-end input (Figure
20) by setting DIE1-2 bits = “0”. In differential input mode, two input pins must not be connected to a signal input in
combination with a VCOM voltage. When single-end input mode, L/RIN1-2 pins should be open, because L/RIN1-2 pins
output an invert signal of the input signal. The AK4613 includes an anti-aliasing filter (RC filter) for both differential
input and the single-end input.
AK4613
L/RIN+
LPF
L/RIN-
LPF
SCF
Figure 19. Differential Input (DIE1-2 bit = “1”)
AK4613
L/RIN
LPF
SCF
L/RIN-
(Open)
Figure 20. Single-end Input (DIE1-2 bit = “0”)
■ Differential / Single-End Output selection
The AK4613 supports the differential output (Figure 21) by setting DOE1-6 bits = “1”, and the single-end output (Figure
22) by setting DOE1-6 bits = “0”. When single-end output mode, L/ROUT1-6- pins should be open, because of
L/ROUT1-6- pins outputs VCOM voltage. The internal analog filters remove most of the noise beyond the audio
passband generated by the delta-sigma modulator of a DAC in single-end input mode. There is no internal analog filter for
differential output. Use external analog filters if needed to remove this noise.
AK4613
SCF
L/ROUT+
L/ROUT-
Figure 21. Differential Output (DOE1-6 bit = “1”)
AK4613
SCF
Diff
to
Single
LPF
L/ROUT
L/ROUT-
(Open)
Figure 22. Single-end Output (DOE1-6 bit = “0”)
MS1052-E-02
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2010/03