PBL 3766
Parameter
Ref
Fig.
Conditions
Min
Typ
Max
Unit
Gain tracking
Two-wire to four-wire
6
Four-wire to two-wire
6
Ref. -10 dBm, 1.0 kHz, Note 7
-40 dBm to +7 dBm
-55 dBm to -40 dBm
Ref. -10 dBm, 1.0 kHz, Note 8
-40 dBm to +7 dBm
-55 dBm to -40 dBm
Note 9
Psophometrical weighting
C-message weighting
-0.15
±0.03
±0.03
±0.03
±0.03
+0.15
dB
dB
dB
dB
-0.15
+0.15
Noise
Idle channel noise at two-wire
(TIPX-RINGX) or four-wire (VTX) port
-83
7
-78
12
dBmp
dBrnC
Harmonic distortion
Two-wire to four-wire
Four-wire to two-wire
Battery feed characteristics
Loop current in constant current region, I
L
0.3 kHz
≤
f
≤
3.4 kHz
0 dBm, 1.0 kHz test signal
Active state, C2, C1 = 1, 0
2500
I
L
=
R
DC
+ 41700
R
DC
in ohms
Stand-by state, C2, C1 = 1, 1
V
Bat
- 3
I
L
=
R
L
+ 1800
V
Bat
tol.
±5%,
T
Amb
= 25
°C
R
D
=
∞,
Note 10
R
D
=
∞,
Note 10
1
0.85 · I
L
-65
-54
dB
I
L
1.15 · I
L
A
Stand-by state loop current, I
L
,
tolerance range
0.75·I
L
I
L
1.25·I
L
A
Loop current detector
On-hook to off-hook threshold, I
LThOff
Off-hook to on-hook threshold, I
LThOn
Detector threshold hysteresis,
∂I
LTh
Loop current detector conversion factor
on-hook to off-hook, K
LThOff
8.0
7.3
0.7
1
375
500
660
mA
mA
mA
V
Loop current detector conversion factor
off-hook to on-hook, K
LThOn
Ring trip detector
Offset voltage,
∆V
DTR
Input bias current, I
DT
Input common mode range, V
DT
Ring relay driver
On-state voltage, V
RRly
Off state leakage current, I
RRly
I
LThOff
= K
LThOff
·
+
R
D
62500
Note 11
1
1
I
LThOn
= K
LThOn
·
+
R
D
62500
Note 11
Source resistance, R
S
= 0
V
Bat
< V
DT
< 0 V
-25
-300
V
Bat
+1
-0.5
455
V
25
-100
-2
-0.2
10
mV
nA
V
V
µA
I
RRly
= 25 mA
V
Bat
< V
RRly
< 0
C
TIPX
27/21
VTX
19/14
Figure 6. Frequency response, insertion
loss, gain tracking.
1
ωC
<< R
L
, R
L
= 600 ohms,
R
L
V
TR
E
L
I
Ldc
PBL 3766
RINGX
28/22
RSN
16/12
R
T
E
RX
V
TX
R
T
= 600 kohms, R
RX
= 300 kohms
R
RX
4-5
ERICSSON [ ERICSSON ]
