AK4650 Datasheet, PDF (38/86 Pages) Asahi Kasei Microsystems – 16Bit ΔΣ CODEC with MIC/HP/SPK-AMP & TSC

[AK4650]
■ MONO LINE OUTPUT (MOUT+ and MOUT− pins)
MICOUT pin
AIN pin
MIC In
AK4650
ATT
+20dB/0dB
IPGA5-0 bits ATTM bit
DAMO bit
MICM bit
ATT+DAC
1/2
1/2
MOGN2-0 bits
+6dB to –15dB
Figure 25. Mono Output
MOUT+ pin
MOUT− pin
Mono mixer mixes signals from MIC In, DAC Lch and Rch. This mixed signal is output from the MOUT+ and MOUT–
pins, creating a differential output. Either the MOUT+ or MOUT– pin can be also used as single-ended output. Load
resistance is 20kΩ(min). When PMMO bit is “0”, mono output is powered-down and MOUT+/– pins become Hi-Z.
PMMO
0
1
MOMT
x
1
0
Mode
MOUT+/MOUT− pin
Power-down
Hi-Z
Mute
VCOM
Normal operation
Normal operation
Table 30. Mono Output Setting
(default)
Volume of path from DAC is controlled by ATTL7-0 and ATTR7-0 bits (Table 25). Volume of path from IPGA is
controlled by ATTM bit (Table 8). Mono output amp has +6dB to –15dB gain that are set by the MOGN2-0 bits (Table
31).
MOGN2-0
GAIN (dB)
STEP
0H
+6.0
1H
+3.0
2H
+0.0
3H
4H
−3.0
−6.0
3dB
5H
−9.0
6H
−12.0
7H
−15.0
Table 31. Mono Output Gain Control
(default)
MS0502-E-01
- 38 -
2007/04