Preliminary
Electrical Characteristics
PBL 386 61/2
0
°C ≤
T
Amb
≤
+70
°C,
V
CC
= +5V
±5
%, V
EE
= -5V
±
5%, V
Bat
= -58V to -40V, R
LC
=18.7kΩ, I
L
= 27 mA, Z
L
= 600
Ω,
R
F1
, R
F2
= 0
Ω,
R
Ref
= 15kΩ, C
HP
= 68nF, C
LP
=0.33
µF,
R
T
= 120 kΩ, R
SG
= 24 kΩ, R
RX
= 120 kΩ, AOV and V
Bat2
pin not connected, unless
otherwise specified. Current definition: current is positive if flowing into a pin.
Parameter
Ref
fig
Conditions
Min
Typ
Max
Unit
Two-wire port
Overload level, V
TRO
,I
LDC
> 10 mA
On-Hook, I
LDC
≤
5 mA
Input impedance, Z
TR
Longitudinal impedance, Z
LoT
, Z
LoR
Longitudinal current limit, I
LoT
, I
LoR
Longitudinal to metallic balance, B
LM
2
Active state
1% THD, Note 1
3.1
1.4
35
V
Peak
V
Peak
Ω/wire
mA
rms
/wire
dB
dB
Note 2
Z
T
/200
0 < f < 100 Hz
20
active state
28
IEEE standard 455-1985, ZTRX = 736
Ω,
active state
0.2 kHz < f < 1.0 kHz
55
1.0 kHz < f < 3.4 kHz
55
3
active state
0.2 kHz
≤
f
≤
1.0 kHz
1.0 kHz < f < 3.4 kHz
3
active state
0.2 kHz
≤
f
≤
1.0 kHz
1.0 kHz < f < 3.4 kHz
4
active state
0.2 kHz < f < 3.4kHz
61
61
55
55
Longitudinal to metallic balance, B
LME
E
B
LME
= 20 • Log
Lo
V
TR
Longitudinal to four-wire balance, B
LFE
E
Lo
B
LFE
= 20 • Log
V
TX
Metallic to longitudinal balance, B
MLE
V
TR
B
MLE
= 20 • Log
V
Lo
dB
dB
dB
dB
40
dB
Figure 2. Overload level, V
TRO
, two-wire
port
1 << R , R = 600
Ω
L
L
ωC
R
T
= 120 kΩ, R
RX
= 120 kΩ
C
TIPX
VTX
R
L
V
TRO
I
LDC
PBL 386 61/2
RINGX
RSN
R
T
E
RX
R
RX
Figure 3. Longitudinal to metallic (B
LME
)
and Longitudinal to four-wire (B
LFE
)
balance
1
ωC
<< 150
Ω,
R
LR
= R
LT
= R
L
/2= 300Ω
TIPX
E
Lo
C
R
LT
V
TR
R
LR
RINGX
VTX
PBL 386 61/2
RSN
R
T
V
TX
R
RX
R
T
= 120 kΩ, R
RX
= 120 kΩ
3
ERICSSON [ ERICSSON ]
