ak4650 AKM Semiconductor, Inc., ak4650 Datasheet - Page 26

• Manufacturer Part Number: ak4650
• Description: 16bit 6 Codec With Mic/hp/spk-amp & Tsc
• Manufacturer: AKM Semiconductor, Inc.

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AK4650 has mic input selector in front of mic amp. MSEL bit selects internal or external mic (Figure 17). When MDIF bit
= “1”, INT and EXT pins become MIC and MIC+ pins, respectively, and differential input is available (Figure 18).
Note 39. In case of differential input, MGAIN bit should be set to “1”.
MS0502-E-01
MIC Input Selector
Maximum input voltage of each input pin is | (MIC+)
Figure 17. MIC Input (MDIF bit = “0”: Single-ended Input)
Figure 18. MIC Input (MDIF bit = “1”: Differential Input)
MDIF bit
0
1
Table 9. MIC Input Selector (x: Don’t care)
MDT pin
MPE pin
EXT pin
MPI pin
MIC+ pin
MIC pin
INT pin
MSEL bit
MPI pin
0
1
x
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500k
Differential
(MIC ) | = 0.198Vpp(typ)@AVDD=3.3V.
Selector
EXT
INT
MIC-Amp
0.2V(typ)
MIC-Amp
AK4650
(default)
DTMIC bit
AK4650
[AK4650]
2007/04