ELECTRICAL CHARACTERISTICS
Description
Transmission Performance
2-wire return loss
Analog output (V
TX
) impedance
Analog (V
TX
) output offset voltage
Overload level, 2-wire and 4-wire
Overload level
THD, Total Harmonic Distortion
THD, on hook
Active state
On hook, R
LAC
= 600
Ω
0 dBm
+4.7 dBm
0 dBm, R
LAC
= 600
Ω
–50
2.5
0.77
–64
–55
–50
–40
–36
200 Hz to 3.4 kHz
26
3
20
+50
dB
Ω
mV
Vpk
Vrms
2a
2b
1, 4
4
Test Conditions (See Note 1)
Min
Typ
Max
Unit
Note
dB
5
Longitudinal Capability (See Test Circuit D)
Longitudinal to metallic,
L-T, L-4 balance
Longitudinal signal generation 4-L
Longitudinal current per pin
(A or B)
Longitudinal impedance (A or B)
Idle Channel Noise
C-message weighted noise
Psophometric weighted noise
R
L
= 600
Ω
R
L
= 600
Ω
R
LAC
= 600, OHT mode
+7
–83
+12
–78
–70
dBrnC
dBmp
4
200 Hz to 1 kHz
1 kHz to 3.4 kHz
200 Hz to 3.4 kHz
Active state
On hook
0 to 100 Hz
53
53
40
8.5
8.5
18
18
25
35
mArms
Ω/pin
8
dB
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
Gain accuracy over frequency
Gain tracking
Gain tracking
On hook
Group delay
0 dBm, 1 kHz
0 dBm, 1 kHz
On hook
On hook
300 Hz to 3400 Hz
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
0°C to 70°C
–40°C to 85°C
0°C to 70°C
–40°C to 85°C
–0.15
–0.20
–6.22
–6.22
–0.35
–6.37
–0.15
–0.15
–0.15
–0.35
4
0
0
–6.02
–6.02
0
–6.02
+0.15
+0.20
–5.82
–5.82
+0.35
–5.67
dB
+0.15
+0.15
+0.15
+0.35
µs
4, 7
5
—
4
—
4
4
4
6
Le7925 Data Sheet
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
