PBL 386 15/1
Electrical Characteristics
-40
°C ≤
T
Amb
≤
+85
°C,
V
CC
= +5V
±5
%, V
EE
= -5V
±
5%, V
Bat
= -58V to -40V, V
Bat2
= -22V, R
LC
=18.7kΩ (I
L
= 27 mA),
R
L
= 600
Ω,
R
LD
= 50 kΩ, R
F1
, R
F2
= 0
Ω,
R
Ref
= 15kΩ, C
HP
= 68nF, C
LP
=0.47
µF,
R
T
= 120 kΩ, R
RX
= 120 kΩ, Current definition:
current is positive if flowing into a pin. Active state includes active normal and active reverse states unless otherwise specified.
Battery definition: V
Bat
= On-hook battery, V
Bat2
= Off-hook battery.
Ref
fig
Parameter
Conditions
Min
Typ
Max
Unit
Two-wire port
Overload level, V
TRO
Off-Hook, I
LDC
≥
10 mA
On-Hook, I
LDC
≤
5 mA
Metering I
LDC
≥
10 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
1.0
1.0
0.7
Z
T
/200
20
V
Peak
V
Peak
V
Peak
35
Ω/wire
mA
rms
/wire
dB
dB
Z
LTTX
= 200
Ω,
f = 16 kHz
Note 2
0 < f < 100 Hz
active state
12
IEEE standard 455-1985, ZTRX = 736
Ω
0.2 kHz < f < 1.0 kHz
53
1.0 kHz < f < 3.4 kHz
53
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 < 3.4 kHz
40
59
59
53
53
70
70
Longitudinal to metallic balance, B
LME
E
B
LME
= 20 • Log
Lo
V
TR
Longitudinal to four-wire balance, B
LFE
E
B
LFE
= 20 • Log
Lo
V
TX
Metallic to longitudinal balance, B
MLE
V
B
MLE
= 20 • Log
TR
;E
RX
= 0
V
Lo
70
70
dB
dB
70
70
dB
dB
58
dB
C
Figure 2. Overload level, V
TRO
, two-wire
port
R
L
V
TRO
I
LDC
TIPX
VTX
PBL 386 15/1
RINGX
RSN
R
T
1
<< R
L
, R
L
= 600
Ω
wC
R
T
= 120 kΩ, R
RX
= 120 kΩ
E
RX
R
RX
Figure 3. Longitudinal to metallic (B
LME
)
and Longitudinal to four-wire (B
LFE
)
balance
1
wC
<< 150
Ω,
R
LR
= R
LT
= R
L
/2= 300Ω
TIPX
E
Lo
C
R
LT
V
TR
R
LR
RINGX
VTX
PBL 386 15/1
RSN
R
T
V
TX
R
RX
R
T
= 120 kΩ, R
RX
= 120 kΩ
3
ERICSSON [ ERICSSON ]
