ak4538 AKM Semiconductor, Inc., ak4538 Datasheet - Page 37

• Manufacturer Part Number: ak4538
• Description: 16bit ?? Codec With Mic/hp/spk-amp
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
n Stereo LINE OUTPUT (LOUT and ROUT pins)
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)
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
MIC In
AUXIN+
AUXIN-
MIC In
ATT+DAC
0dB/+20dB
0dB/+20dB
ATT+DAC
1/2
1/2
Volume
Figure 32. Stereo Line Output
Figure 33. Mono Output
IPGA
IPGA
“DAMO”
“DAHS”
“AUXL”
- 37 -
ATT
“MICM”
“MICL”
-17dB/6dB
“MOGN”
Stereo Line Out
MOUT+
MOUT-
[AK4538]
2003/5