AK4538 Datasheet, PDF (37/70 Pages) Asahi Kasei Microsystems – 16Bit DS CODEC with MIC/HP/SPK-AMP

ASAHI KASEI
[AK4538]
n Stereo LINE OUTPUT (LOUT and ROUT pins)
MIC In
0dB/+20dB
ATT
IPGA
ATT+DAC
“DAHS”
AUXIN+
“AUXL”
“MICL”
Stereo Line Out
AUXIN-
Volume
Figure 32. Stereo Line Output
Line out path doesn’t have Volume but the output signal level can be controlled by the attenuator of DAC, Volume of Mic
In and AUX In. There aren’t mute circuits to remove POP noise at power up and down for Line Output.
n MONO LINE OUTPUT (MOUT+ and MOUT- pins)
MIC In
0dB/+20dB
IPGA
ATT+DAC
“DAMO”
1/2
1/2
“MICM”
“MOGN”
-17dB/6dB
Figure 33. Mono Output
MOUT+
MOUT-
Mono mixer mixes signal from MIC In, Lch signal and Rch signal from DAC. This mixed signal is output from the
MOUT+ and MOUT- pins, creating a differential output. Either the MOUT+ or MOUT- pins can be also used as
single-ended output. Amp for mono output has 6dB gain and -17dB gain that are set by the MOGN bit.
MS0198-E-01
- 37 -
2003/5