參數(shù)資料
型號： 73M1922-DB
廠商： Maxim Integrated Products
文件頁數(shù)： 13/82頁
文件大小： 0K
描述： BOARD DEMO 73M1922 20-TSSOP
產(chǎn)品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 1
主要目的： *
嵌入式： 否
已用 IC / 零件： *
主要屬性： *
次要屬性： *
已供物品： 板，CD
73M1822/73M1922 Data Sheet
DS_1x22_001
20
Rev. 1.6
3.4.2
Call Progress Monitor
The Call Progress Monitor monitors activities on the line. The audio output contains both transmit and
receive data with a configurable level individually set by Register 0x10.
Figure 8 shows the frequency response of the Call Progress Monitor Filter based upon the characteristics of
the device plus the external circuitry as shown.
Figure 8: Call Progress Monitor Frequency Response
U1
NJM2135
CD
1
-VIN
4
V+
6
GND
7
VOUT1
5
VOUT2
8
VREF1
2
VREF2
3
AOUT
VCC
R3 120K
+
C2
2.2uF
LS1
INTERVOX
AT-2308
C4
1uF
R2
120K
R1 120K
C3
1uF
C1 0.1uF
Figure 9: Demo Board Circuit Connecting AOUT to a Speaker
Table 12: Component Values for the Speaker Driver
Quantity
Reference
Part Description
Part
1
C1
Ceramic capacitor
0
.1 μF
1
C2
Ceramic capacitor
2.2 μF (optional)
2
C3, C4
Ceramic capacitor
1 μF
1
LS1
Sound transducer
Speaker (Intervox)
3
R1, R2, R3
1/8 W resistor
120 kΩ
1
U1
Audio amplifier
NJM2135 (New Japan Radio)
All measurements are at the AOUT pin with CMVSEL=0. Note that when CMVSEL=1, the peak signal at
AOUT is increased to approximately 1.11 Vpk.
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