Le7920
ELECTRICAL CHARACTERISTICS (continued)
Description
Line Characteristics
I
L
, Short Loops, Active state
I
L
, Long Loops, Active state
I
L
, Accuracy, Standby state
R
LDC
= 600
Ω
R
LDC
= 1930
Ω,
BAT = –42.75 V,
T
A
= 25°C
BAT – 3 V
-
I
L
= ------------------------------
R
L
+ 400
R
L
= 0
Active, A and B to ground
V
BAT
= –52 V
50 Hz to 3.4 kHz
50 Hz to 3.4 kHz
CAS pin to V
BAT
–42.75
30
28
85
85
–44
40
50
170
25
35
125
R
L
= 600
Ω
R
L
= 300
Ω,
R
TMG
= 2350
Ω
Disconnect state
Standby state
Active state, BAT = –48 V
Disconnect state
Standby state
Active state, BAT = –48 V
100 kHz to 30 MHz, (See Figure F)
I
RSN
= 0 mA
200 Hz to 3.4 kHz
2.0
0.8
–75
–400
I
OUT
= 0.3 mA, 15 kΩ to V
CC
I
OUT
= –0.1 mA, 15 kΩ to V
CC
2.4
–500
Source resistance = 2 MΩ
–50
–50
0
+50
0.40
40
0
10
20
860
450
1.7
2.2
6.3
0.25
0.55
2.8
255
70
100
270
1200
800
4.0
4.0
8.5
1.0
1.5
4.8
1.0
T
A
= 25°C
20
18
0.7I
L
18
23
19
I
L
30
100
120
1.3I
L
26
Test Conditions (See Note 1)
Min
Typ
Max
Data Sheet
Unit
Note
mA
Constant-current region
I
L
, Loop current, Disconnect state
I
L
LIM
VAB, Open Circuit voltage
V
CC
V
BAT
Effective internal resistance
Power Dissipation
On hook, Disconnect state
On hook, Standby state
On hook, Active state
Off hook, Standby state
Off hook, Active state
Supply Currents, Battery = –48V
I
CC
,
On-hook V
CC
supply current
I
BAT
,
On-hook V
BAT
supply current
RFI Rejection
RFI rejection
Receive Summing Node (RSN)
RSN DC voltage
RSN impedance
Logic Inputs (C2–C1 and D3–D1)
V
IH
, Input High voltage
V
IL
, Input Low voltage
I
IH
, Input High current
I
IL
, Input Low current
Logic Output (DET)
V
OL
, Output Low voltage
V
OH
, Output High voltage
Ring-Trip Detector Input (DA, DB)
Bias current
Offset voltage
µA
mA
V
Power Supply Rejection Ratio (V
RIPPLE
= 100 mVrms), Active Normal State
dB
kΩ
5
4
mW
mA
mVrms
V
Ω
4
4
V
µA
V
nA
mV
6
9
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
