ISD5100 – SERIES
*
FTHRU
6 dB
AGC
AGPD
0
1
CONDITION
Power Up
Power Down
MIC+
AGC
MIC IN
MIC–
1 ( AGPD)
To AutoMute
(Playback Only)
ACAP
* Differential Path
11 10
15
14
13
12
9
8
7
6
5
4
3
2
1
0
VLS1 VLS0 VOL2 VOL1 VOL0 S1S1 S1S0 S1M1 S1M0 S2M1 S2M0 FLS0 FLD1 FLD0 FLPD AGPD
CFG1
ANA IN (Analog Input)
The ANA IN pin is the analog input from the telephone chip set. It can be switched (by the I2C
interface) to the speaker output, the array input or to various other paths. This pin is designed to
accept a nominal 1.11 V p-p when at its minimum gain (6 dB) setting. There is additional gain
available, if required, in 3 dB steps, up to 15 dB. The gain settings are controlled from the I2C
interface.
Gain
Resistor Ratio Gain
(Rb/Ra)
Gain2
(dB)
Setting
CCOUP = 0.1 µF
00
01
10
11
63.9 / 102
77.9 / 88.1
92.3 / 73.8
106 / 60
0.625
0.883
1.250
1.767
-4.1
-1.1
1.9
ANA IN
Input
ANA IN
4.9
Input Amplifier
Note: Ra & Rb are in kΩ
2xRaCCOUP
ANA IN Amplifier Gain Settings
Setting(1)
0TLP I(n3p) ut
CFG0
Gain(2)
Array
Speaker
Out VP-P
(4)
VP-P
In/Out VP-P
AIG1
AIG0
6 dB
9 dB
12 dB
15 dB
1.110
0.785
0.555
0.393
0
0
1
1
0
1
0
1
0.625
0.883
1.250
1.767
0.694
0.694
0.694
0.694
2.22
2.22
2.22
2.22
- 34 -
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