PBL38772 查看數據表（PDF） - Ericsson
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PBL38772 Datasheet PDF : 24 Pages
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PBL 387 72
Electrical Characteristics
-40 °C ≤ TAmb ≤ +85 °C, VCC = +5 V ±5 %, VTBat = -32 V to -10 V, VBat = -80 V, VR = 0.81 Vpk, RLC= 18.7 kΩ, (IL = 26.8 mA), ZL = 600 Ω,
RLD = 49.9 kΩ, RF1 = RF2 = 0 , RRef = 15.0 kΩ, RRT = 66.5 kΩ, CHP = 33 nF, CLP= 0.47 µF, RT = 120 kΩ, RRX = 120 kΩ, RVR = 200 kΩ,
CVR = 0.47 µF.
Current definition: current is positive if flowing into a pin unless stated otherwise. Active state includes active normal and active reverse
states unless otherwise specified.
Parameter
Two-wire port
Overload level, VTRO
Off-Hook, ILDC ≥ 10 mA
On-Hook, ILDC ≤ 5 mA
Metering, ILDC ≥ 10 mA
Input impedance, ZTRX
Longitudinal impedance, ZLOT, ZLOR
Longitudinal current limit, ILOT, ILOR
Longitudinal to metallic balance, BLM
Longitudinal to metallic balance, BLME
BLME = 20 × Log
ELO
VTR
Longitudinal to four-wire balance, BLFE
BLFE = 20 × Log
ELO
VTX
Metallic to longitudinal balance, BMLE
BMLE = 20 × Log
VTR
VLO
, ERX = 0
Ref
fig Conditions
Min
Typ
Active state
2 1% THD, Note 1
1.0
1.0
ZLM = 200 Ω, f = 16 kHz
Note 2
0 < f < 100 Hz
active state
28
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
53
1.0 kHz < f < 3.4 kHz
53
3 active state
0.2 kHz ≤ f ≤ 1.0 kHz
53
1.0 kHz < f < 3.4 kHz
53
4 active state
0.2 kHz < f < 3.4 kHz
40
0.7
ZT/200
20
70
70
70
70
70
70
58
Max
35
Unit
VPeak
VPeak
VPeak
Ω
Ω/wire
mArms /wire
dB
dB
dB
dB
dB
dB
dB
TIPX
VTX
C
RL
VTRO
ILdc
PBL 387 72
RT
E RX
RINGX RSN
RRX
1
ωC
<<
RL,
RL=
600
Ω
RT = 120 kΩ,
RRX = 120 kΩ
Figure 2. Overload level, VTRO, two-wire port.
ELo C
TIPX
VTX
RLT
VTR PBL 387 72
RLR
RINGX RSN
RT
V TX
RRX
1
ωC << 150 Ω,
RLT = RLR = 300Ω or 368 Ω
RT = 120 kΩ,
RRX = 120 kΩ
Figure 3. Longitudinal to metallic, BLME, and Longitudinal to four-wire, BLFE, balance.
EN/LZT 146 136 R1A © Ericsson Microelectronics, December 2001
3
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