PBL 387 71
Electrical Characteristics
0 °C
≤
T
Amb
≤
+70 °C, V
CC
= +5 V ±5 %, V
TBat
= -32 V to -10 V, V
Bat
= -80 V, V
R
= 0.81 Vpk, R
LC
= 18.7 kΩ, (I
L
= 26.8 mA), Z
L
= 600
Ω,
R
LD
= 49.9 kΩ, R
F1
= R
F2
= 0 , R
Ref
= 15.0 kΩ, R
RT
= 66.5 kΩ, C
HP
= 33 nF, C
LP
= 0.47 µF, R
T
= 120 kΩ, R
RX
= 120 kΩ, R
VR
= 200 kΩ,
C
VR
= 0.47
µF.
Current definition: current is positive if flowing into a pin unless stated otherwise.
Parameter
Ref
fig
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
TRX
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
Z
LM
= 200
Ω,
f = 16 kHz
Note 2
0 < f < 100 Hz
active state
28
70
70
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
58
dB
53
53
70
70
dB
dB
53
53
70
70
dB
dB
1.0
1.0
V
Peak
V
Peak
V
Peak
Ω
35
Ω/wire
mA
rms
/wire
dB
dB
0.7
Z
T
/200
20
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
B
MLE
= 20 × Log
TR
, E
RX
= 0
V
LO
C
R
L
V
TRO
I
Ldc
TIPX
VTX
R
T
1
ωC
E
RX
<< R
L
, R
L
= 600
Ω
PBL 387 71
RINGX
RSN
R
T
= 120 kΩ,
R
RX
= 120 kΩ
R
RX
Figure 2. Overload level, V
TRO
, two-wire port.
TIPX
E
Lo
C
R
LT
V
TR
R
LR
VTX
R
T
1
ωC
V
TX
<< 150
Ω,
PBL 387 71
RINGX
RSN
R
LT
= R
LR
= 300Ω or 368
Ω
R
T
= 120 kΩ,
R
RX
= 120 kΩ
R
RX
Figure 3. Longitudinal to metallic, B
LME
, and Longitudinal to four-wire, B
LFE
, balance.
EN/LZT 146 135 R1A © Ericsson Microelectronics, December 2001
3
ERICSSON [ ERICSSON ]
