PBL 3766
Electrical Characteristics
0
°C
< T
Amb
< 70
°C,
V
CC
= +5 V
±5
%, V
EE
= -5 V
±5
%, V
Bat
= -48 V, R
SG
= 0 ohm , R
DC
= 41.7 kohms, R
D
=
∞,
Z
L
= 600 ohms,
C
HP
= 33 nF, C
DC
= 1.5
µF
unless otherwise specified.
Parameter
Ref
Fig.
Conditions
Min
Typ
Max
Unit
Two-wire port
Overload level, V
TRO
Input impedance, Z
TRX
Longitudinal impedance, Z
LoT
, Z
LoR
Longitudinal current limit, I
LoT
, I
LoR
Longitudinal to metallic balance, B
LM
PBL 3766
PBL 3766/6
Longitudinal to metallic balance, B
LME
2
Z
L
= 600 ohms, 1% THD, Note 1
Note 2
f < 100 Hz
active state, C2, C1 = 1, 0
IEEE standard 455-1985
0.2 kHz
≤
f
≤
3 kHz
3.1
25
20
40
V
Pk
ohm/wire
mA
pk
/wire
53
48
3
|V
TR
|
0.05kHz
≤
f
≤
3.4kHz
B
LME
= 20 · log
|E
Lo
|
58
58
dB
dB
PBL 3766
PBL 3766/6
Longitudinal to four-wire balance, B
LFE
53
48
3
|V
TX
|
0.05kHz
≤
f
≤
3.4kHz
B
LFE
= 20 · log
|E
Lo
|
58
58
dB
dB
PBL 3766
PBL 3766/6
Metallic to longitudinal balance, B
MLE
53
48
4
B
MLE
= 20 · log
|E
TR
|
|V
Lo
|
0.2kHz
≤
f
≤
3.4kHz
, E
RX
= 0
50
48
4
B
FLE
= 20 · log
|E
RX
|
|V
Lo
|
0.2kHz
≤
f
≤
3.4kHz
, E
TR
source removed
40
58
58
dB
dB
PBL 3766
PBL 3766/6
Four-wire to longitudinal balance, B
FLE
55
55
dB
dB
55
dB
C
TIPX
27/21
VTX
19/14
Figure 2. Overload level, V
TRO
, two-wire
port.
1
ωC
< R
L
, R
L
= 600 ohms,
<
R
L
V
TRO
I
Ldc
PBL 3766
RINGX
28/22
RSN
16/12
R
T
E
RX
R
T
= 600 kohms, R
RX
= 300 kohms
R
RX
Figure 3. Longitudinal to metallic (B
LME
)
and longitudinal to four-wire (B
LFE
)
balance.
1
ωC
<< 150 ohms, R
LR
= R
LT
= 300 ohms,
E
L
O
C
R
LT
V
TR
R
LR
TIPX
27/21
VTX
19/14
PBL 3766
RINGX
28/22
RSN
16/12
R
T
V
TX
R
T
= 600 kohms, R
RX
= 300 kohms
R
RX
4-3
ERICSSON [ ERICSSON ]
