MT9160B/61B
Advance Information
Applications
Figure 9 shows an application in a digital phone set.
Various configurations of pair gain drops are
depicted in Figures 12a and 12b using the MT9125
and MT9126, respectively.
330Ω
+5V
+
-
330Ω
VBias
T
+
-
+
M+
+5V
0.1 µF
M+
M-
+
10 µF
0.1 µF
511Ω
100K
100K
10 µF
R
R
1K
+
Av = 1 + 2R
T
VBias
T
+
Electret
Microphone
VBias
Electret
Microphone
0.1 µF
R
Single-ended Amplifier
-
511Ω
M-
+
Differential Amplifier
VBias
Typical External Gain
AV= 5-10
M+
M-
(
)
0.1 µF
1 µF
0.1 µF
0.1 µF
1
2
20
19
18
17
100K
75Ω
+5V
3
4
5
A/µ/IRQ
MT9160B
16
15
14
13
12
11
150Ω
6
7
+5V
75Ω
INTEL
MCS-51
or
MOTOROLA
SPI
Micro-
Controller
CS
SCLK
DATA1
DATA2
8
9
10
DATA2 Motorola
Mode only
DSTi
+5V
Lin
DC to DC
Converter
DSTo
MT8972
DNIC
Z
T
F0i
Twisted Pair
Lout
C4b
10.24 MHz
Figure 9 - Digital Telephone Set
93
MITEL [ MITEL NETWORKS CORPORATION ]
