
ISD5008
Publication Release Date: Oct 31 2008
- 12 -
Revision 1.2
6.2
ANALOG FUNCTIONAL PINS
6.2.1
Mic+, Mic-
VCC
1.5 k
Ω
1.5 k
Ω
1.5 k
Ω
220 F
μ
0.1
F
μ
C
COUP = 0.1
F
μ
Electret
Microphone
WM-54B
Panasonic
Internal to the device
NOTE:
fCUTOFF=
COUP
a
C
R
2
1
π
MIC
R
a = 10 k Ω
10 k
Ω
+
MIC+
FIGURE 1: MICROPHONE INPUT
6.2.2
ANA IN (Analog Input)
C
COUP = 0.1
F
μ
Internal to the device
NOTE:
fCUTOFF=
COUP
a
C
R
2
1
π
Ra
ANA IN
Input
Rb
ANA IN
Input Apmlifier
Gain
Setting
Resistor Ratio
(Rb/Ra) k
Ω/kΩ
Gain
2
(dB)
00
63.9/102
0.625
-4.1
01
77.9/88.1
0.88
-1.1
10
92.3/73.8
1.25
1.9
11
106/60
1.77
4.9