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AK4640 Datasheet, PDF (39/76 Pages) Asahi Kasei Microsystems – 16BIT CODEC WITH MIC /HP/SPK-AMPl | |||
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ASAHI KASEI
[AK4640]
 Mono Output (MOUT+/MOUTâ pins)
MIC In
MICOUT pin AIN pin
ATTM bit
ATT
AK4640
+20dB/0dB IPGA Lch
DAMO bit
MICM bit
1/2
ATT+DAC
1/2
MOGN bit
+6dB/-17dB
Figure 28. Mono Line Output
MOUT+ pin
MOUTâ pin
When DAMO bit is â1â, mono mixer mixes Lch and Rch signal from DAC. This mixed signal is output to mono line
output that is differential output. When MICM bit is â1â, Lch signal from IPGA is output to mono line output. Either
MOUT+ or MOUTâ pin can be used as single-ended output pin. The load impedance is 20k⦠(min.). When the PMMO
bit is â0â, the mono line output enters power-down-mode and the output is placed in a Hi-Z state.
ATTL7-0 and ATTR7-0 bits set the volume control of DAC output. ATTM bit sets the volume control of IPGA Lch
output. Amp for mono line output has 6dB gain and â17dB gain that are set by the MOGN bit.
MS0273-E-00
- 39 -
2004/03
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