參數(shù)資料
型號： LE79555-4VC
英文描述： Telecommunication IC
中文描述： 通信集成電路
文件頁數(shù)： 7/16頁
文件大小： 411K
代理商： LE79555-4VC
SLIC Products
7
ELECTRICAL CHARACTERISTICS
Description
Test Conditions (see Note 1)
Min
Typ
Max
Unit
Note
Transmission Performance
2-wire return loss
Analog output (VTX) impedance
Analog (VTX) output offset voltage
Overload level, 2-wire
Overload level
THD, Total Harmonic Distortion
200 Hz to 3.4 kHz
26
dB
mV
Vpk
Vrms
1, 4
4
1
20
+50
–
50
2.5
0.77
Active state
On hook, R
LAC
= 600
0 dBm
+7 dBm
0 dBm, R
LAC
= 600
2a
2b
–
64
–
55
–
50
–
40
–
36
dB
5
THD, On hook
Longitudinal Capability (See Test Circuit D)
Longitudinal to metallic L-T, L-4
200 Hz to 1 kHz
Longitudinal to metallic L-T, L-4
1 kHz to 3.4 kHz
Normal Polarity
0
°
C to +70
°
C
-40
°
C to +85
°
C
0
°
C to +70
°
C
-40
°
C to +85
°
C
Reverse Polarity
-40
°
C to +85
°
C
0
°
C to +70
°
C
-40
°
C to +85
°
C
Normal Polarity
0
°
C to +70
°
C
-40
°
C to +85
°
C
0
°
C to +70
°
C
-40
°
C to +85
°
C
Reverse Polarity
-40
°
C to +85
°
C
0
°
C to +70
°
C
-40
°
C to +85
°
C
200 Hz to 3.4 kHz
Active state
0 to 100 Hz
-2,-4
-2,-4
-1,-3
-1,-3
-2
-1
-1
63
58
52
50
54
52
50
dB
4
4
4
4
-2,-4
-2,-4
-1,-3
-1,-3
-2
-1
-1
58
53
52
50
53
52
50
40
17
4
4
4
4
Longitudinal signal generation 4-L
Longitudinal current per pin (A or B)
Longitudinal impedance at A or B
Idle Channel Noise
C-message weighted noise
27
25
mArms
/pin
8
4
R
L
= 600
R
L
= 600
R
L
= 600
R
L
= 600
0
°
C to +70
°
C
–
40
°
C to +85
°
C
0
°
C to +70
°
C
–
40
°
C to +85
°
C
7
+10
+12
–
80
–
78
dBrnc
4
Psophometric weighted noise
–
83
dBmp
Insertion Loss and Balance Return Signal (See Test Circuits A and B)
Gain accuracy
4- to 2-wire
Gain accuracy
2- to 4-wire, 4- to 4-wire
Gain accuracy, 4- to 2-wire
Gain accuracy, 2- to 4-wire, 4- to 4-wire On hook
Gain accuracy over frequency
0 dBm, 1 kHz
–
0.20
0
+0.20
dB
3
0 dBm, 1 kHz
–
6.22
–
6.02
–
5.82
3
On hook
–
0.35
–
6.37
–
0.15
+0.35
–
5.67
+0.15
3,4
–
6.02
300 to 3.4 kHz
relative to 1 kHz
+3 dBm to
–
55 dBm
relative to 0 dBm
0 dBm to
–
37 dBm
+3 dBm to 0 dBm
0 dBm, 1 kHz
3
Gain tracking
–
0.15
+0.15
3,4
Gain tracking
On hook
Group delay
–
0.15
–
0.35
+0.15
+0.35
3,4
4
μs
4, 7
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