Le79489
ELECTRICAL CHARACTERISTICS
(CONTINUED)
Description
Line Characteristics
I
L
, Active
Short loop
Medium loop
Long loop
Short loop
Long loop
R
LDC
= 250
Ω
R
LDC
= 700
Ω
R
LDC
= 2 kΩ
R
LDC
= 250
Ω
R
LDC
= 2 kΩ
V
BAT1
– 3 V
I
L
= ----------------------------------
-
R
L
+ 400
Current limited region
I
L
, Loop current, Disconnect state
I
L
LIM
V
apparent
V
AB
, Open loop voltage
BAT SW hysteresis
BAT SW threshold
(from V
BAT1
to V
BAT2
)
I
A
, Leakage, Tip Open state
I
B
, Current, Tip Open state
V
A
, Active
R
L
= 0
B to GND
RA to BAT1 = 7 kΩ, RB to
GND = 100
Ω
50 Hz to 3.4 kHz
50 Hz to 3.4 kHz
50 Hz to 3.4 kHz
50 Hz
100 Hz
200 Hz
500 Hz to 3.4 kHz
CAS pin to GND
18
–7.5
30
–5
Active, Normal
Reverse Polarity
OVH = 0
40.3
39.8
37
R
L
= 0
Active, A and B to GND
95
52
41.7
41.7
39
1150
BAT2
+ 8.5
100
56
T
A
= 25
°
C
44.2
33.4
17.2
44.2
16.0
0.7 I
L
18
48.6
37.1
19.2
48.6
18.0
I
L
30
100
135
54.0
40.8
21.2
54.0
20.0
1.3 I
L
Test Conditions (See Note 1)
Min
Typ
Max
Data Sheet
Unit
Note
I
L
, Active
mA
I
L
, Accuracy, Standby state
µA
mA
4
V
mV
V
µA
mA
V
4
Power Supply Rejection Ratio (Vripple = 100 mVrms), Active Normal State
V
CC
V
BAT1
V
BAT2
V
BAT1
, Open loop, R
LAC
= 600
Ω
(Anti-sat region)
30
28
35
8
15
20
28
85
45
50
50
14
22
29
40
170
35
50
OVH = 1
OVH = 0
R
L
= 600
Ω
R
L
= 250
Ω
R
L
= 700
Ω
Disconnect state
Standby state
Active state
Disconnect state
Standby state
Active state
150
550
1000
880
800
2.5
3.0
6.3
0.5
0.7
2.8
255
70
85
250
620
1300
1200
1000
4.5
4.5
9.5
1.0
1.5
4.8
mW
9
dB
4
3
4
Effective internal resistance
Device Power Dissipation
Open loop, Disconnect state
Open loop, Standby state
Open loop, Active state
Open loop, Active state
Off hook, Standby state
Off hook, Active state
Supply Currents, Battery
I
CC
,
Open Loop V
CC
supply current
I
BAT1
,
Open Loop V
BAT1
supply current
kΩ
4
mA
7
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
