[AK4614]
■ Differential / Single-End Input selection
The AK4614 supports the differential input (Figure 19) by setting DIE1-3 bits = “1”, supports the single-end input (Figure
20) by setting DIE1-3 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/RIN1-3- pins should be open, because L/RIN1-3-
pins output an invert signal of the input signal. The AK4614 includes an anti-aliasing filter (RC filter) for both differential
input and the single-end input.
AK4614
AK4614
L/RIN+
L/RIN
LPF
LPF
SCF
SCF
LPF
L/RIN-
L/RIN-
(Open)
Figure 19. Differential Input (DIE1-3 bit = “1”)
Figure 20. Single-end Input (DIE1-3 bit = “0”)
■ Differential / Single-End Output selection
The AK4614 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.
AK4614
AK4614
L/ROUT+
L/ROUT
LPF
Diff
to
Single
SCF
SCF
L/ROUT-
L/ROUT-
(Open)
Figure 21. Differential Output (DOE1-6 bit = “1”)
Figure 22. Single-end Output (DOE1-6 bit = “0”)
MS1025-E-00
2008/10
- 30 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
