Isd5100 – series – Rainbow Electronics ISD5100 User Manual
Page 34
ISD5100 – SERIES
- 34 -
MIC+
M
IC
–
ACAP
FTHR U
AGC
1 ( AG PD)
6 dB
To AutoM ute
(Pl ayb ack O nly)
*
* Di ffe re nti al P ath
AG C
1 5
14
1 3
12
1 1
10
9
8
7
6
5
4
3
2
1
0
VL S1
VL S0
VOL2
VOL1
V OL 0
S1 S1
S1S0
S1M1
S1 M0
S2M1
S2M0
FLS0
FLD1
FL D0
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 I
2
C
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
I
2
C
interface.
ANA IN Amplifier Gain Settings
AGPD CONDITION
0 Power
Up
1 Power
Down
MIC IN
Gain
Setting
Resistor Ratio
(Rb/Ra)
Gain Gain
2
(dB)
00
63.9 / 102
0.625
-4.1
01
77.9 / 88.1
0.883
-1.1
10
92.3 / 73.8
1.250
1.9
11
106 / 60
1.767
4.9
Note: Ra & Rb are in k
Ω
CFG0
Setting
(1)
0TLP
Input
V
P-P
(3)
AIG1 AIG0
Gain
(2)
Array
In/Out V
P-P
Speaker
Out V
P-P
(4)
6 dB
1.110
0
0
0.625
0.694
2.22
9 dB
0.785
0
1
0.883
0.694
2.22
12 dB
0.555
1
0
1.250
0.694
2.22
15 dB
0.393
1
1
1.767
0.694
2.22
ANA IN
Input
ANA IN
Input Amplifier
NOTE:
f
CUTTOFF
2xR
a
C
COUP
1
Ra
Rb
C
COUP =
0.1
µ
F
Internal to the device