P3357
SPECIFICATIONS
Electrical
At T = 25ºC and as circuit Fig. 2 unless otherwise stated.
Parameter
Conditions
Insertion Loss
Frequency Response
f = 2kHz, R
L
= 600Ω
LF -3dB cutoff
HF -3dB cutoff
100Hz – 4kHz
200Hz – 4kHz
200Hz – 4kHz
150Hz -3dBm in line
200Hz -10dBm in line
50Hz
DC
Min
-
-
-
-
16
20
-
-
2.12
3.0
Typ
1.5
10
55
-
-
-
-70
-89
-
-
Max
-
-
-
±0.1
-
-
-
-
-
-
Units
dB
Hz
kHz
dB
dB
dB
dBm
dBm
kVrms
kV
Return Loss
(5)
Transhybrid Loss
(5)
Third Harmonic
Distortion
(1)
Voltage Isolation
(2)
Operating Range:
Functional
Storage
Lumped equivalent circuit parameters as Fig. 1
DC resistance
(3)
Leakage inductance,
ΔL
Shunt inductance, Lp
(4)
Shunt loss, Rp
200Hz 10mV
200Hz 10mV
Sum of winding
resistances R
DCP
+ R
DCS
0
-40
-
-
+70
+85
ºC
ºC
165
-
207
Ω
mH
H
kΩ
3
6
12
3.9
9
15
5
-
-
Notes:
1. Third harmonic typically exceeds other
harmonics by 10dB.
2. Components are 100% tested at 6.5kVDC.
3. Caution: do not pass DC through windings.
Telephone line current must be diverted using
semiconductor line hold circuit or choke.
4. At signal levels greater than 100mV, Lp will
increase and Rp will decrease slightly but the
effect is usually favourable to the return loss
characteristic.
5. Return loss and transhybrid loss can be
improved to 30dB in improved matching circuit.
The values shown relate to the simplest
configuration, Fig. 2.
Equivalent Circuit
Fig. 1
�½ L
�½ L
IDEAL
1:1
ETALDOC 724/7
Page 2 of 5
April 2005
ETAL [ ETAL Group ]
