Le79489
ELECTRICAL CHARACTERISTICS
Description
Transmission Performance
2-wire return loss
(See Test Circuit D)
Analog output (V
TX
) impedance
Analog output (V
TX
) offset voltage
Overload level, 2-wire
THD, Total Harmonic Distortion
THD, open loop
Longitudinal to metallic L-T
200 Hz to 1 kHz
Active state
0 dBm
+7 dBm
0 dBm, R
LAC
= 600
Ω
Normal polarity
Normal polarity
Normal polarity
Reverse polarity
Normal polarity
Normal polarity
Normal polarity
Reverse polarity
200 Hz to 3.4 kHz
Active state
0 to 100 Hz
–3*
–2
–2
–2
–3
–2
–2
–2
52
60
58
54
52
54
54
54
40
15
27
25
23
R
L
= 600
Ω
R
L
= 600
Ω
0 dBm, 1 kHz
0 dBm, 1 kHz
Open loop
Open loop
300 to 3.4 kHz, relative to 1 kHz
+3 dBm to –55 dBm relative to 0 dBm
0 dB to –15 dB
0 dBm, 1 kHz
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
–0.15
–0.20
–6.05
–6.10
–0.35
–6.25
–0.10
–0.10
–0.35
4
–5.90
+7
–83
0
0
–5.90
–5.90
+12
–78
+0.15
+0.20
–5.75
–5.70
+0.35
–5.55
+0.10
+0.10
+0.35
Longitudinal Capability (See Test Circuit C)
0°C to +70°C
–40°C to +85°C
–40°C to +85°C
0
°C
to +70°C
–40°C to +85°C
–40°C to +85°C
–50
2.5
–64
–55
–50
–40
–36
200 Hz to 3.4 kHz
26
3
20
+50
Test Conditions (See Note 1)
Min
Typ
Max
Data Sheet
Unit
dB
Ω
mV
Vpk
dB
Note
4, 6
4
2a, 3
3
4
Longitudinal to metallic L-T
1 kHz to 3.4 kHz
dB
8
Longitudinal signal generation 4-L
Longitudinal current per pin
(A or B)
Longitudinal impedance at A or B
Longitudinal Induction
Idle Channel Noise
C-message weighted noise
Psophometric weighted noise
Gain, 4- to 2-wire
Gain, 2- to 4-wire, 4-to-4-wire
Gain, 4- to 2-wire
Gain, 2- to 4-wire, 4- to 4-wire
Gain over frequency
Gain tracking
Gain tracking open loop
Group delay
Note:
* P.G. = Performance Grade
dB
mArms
Ω/pin
dBrnc
dBrnC
dBmp
7
4
4
4, 8
8
Insertion Loss (See Test Circuits A and B)
4
4
dB
4
4
4
µs
4, 6
6
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
