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