AK4646EN AKM [Asahi Kasei Microsystems], AK4646EN Datasheet - Page 31
![no-image](/images/no-image-200.jpg)
AK4646EN
Manufacturer Part Number
AK4646EN
Description
Stereo CODEC with MIC/SPK-AMP
Manufacturer
AKM [Asahi Kasei Microsystems]
Datasheet
1.AK4646EN.pdf
(79 pages)
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Price
Part Number:
AK4646EN-L
Manufacturer:
AKM
Quantity:
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■
The AK4646 has a gain amplifier for microphone input. The gain of MIC-Amp is selected by the MGAIN2-0 bits (Table
19). The typical input impedance is 30k Ω (typ).
■
When PMMP bit = “1”, the MPWR pin supplies power for the microphone. This output voltage is typically 0.8 x AVDD
and the load resistance is minimum 0.5k Ω . In case of using two sets of stereo microphone, the load resistance is minimum
2k Ω for each channel. Any capacitor must not be connected directly to MPWR pin (Figure 23).
MS0557-E-02
MIC Gain Amplifier
MIC Power
MGAIN2 bit
0
0
0
0
1
1
1
1
MIC Power
MGAIN1 bit
PMMP bit
0
1
0
0
1
1
0
0
1
1
Figure 23. MIC Block Circuit
Table 19. Mic Input Gain
Table 20. MIC Power
MPWR pin
LIN1 pin
RIN1 pin
LIN2 pin
RIN2 pin
MGAIN0 bit
- 31 -
MPWR pin
0
1
0
1
0
1
0
1
Output
Hi-Z
Input Gain
+20dB
+26dB
+32dB
+10dB
+17dB
+23dB
+29dB
(default)
0dB
Microphone
Microphone
Microphone
Microphone
(default)
[AK4646]
2007/05
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