L9215A/G
Short-Loop Sine Wave Ringing SLIC
Data Sheet
September 2001
Electrical Characteristics (continued)
Table 11. 2-Wire Port
Parameter
Tip or Ring Drive Current = dc + Longitudinal + Signal Currents + PPM
Tip or Ring Drive Current = Ringing + Longitudinal
Signal Current
Min
105
65
Typ
—
Max
—
Unit
mAp
—
—
mAp
10
—
—
mArms
mArms
Longitudinal Current Capability per Wire (Longitudinal current is indepen-
dent of dc loop current.)
8.5
15
—
PPM Signal Current = 1.25 VMAX into 200 Ω ac
Ringing Current (RLOAD = 1386 Ω + 40 µF)
Ringing Current Limit (RLOAD = 100 Ω)
6.25
29
—
—
—
—
—
50
mArms
mArms
mAp
—
dc Loop Current—ILIM (RLOOP = 100 Ω):
Programming Range (VCC = 5 V)
Programming Range (VCC = 3.3 V)
Voltage at VPROG
15
15
0.194
—
—
—
70
45
1.01
mA
mA
V
dc Current Variation (current limit 22 mA to 28 mA)
dc Current Variation (current limit 70 mA)
—
—
—
—
—
50
±8
±10
—
%
%
Ω
dc Feed Resistance (does not include protection resistors)
Open Loop Voltages:
Scan Mode:
|VBAT1| > 51 V |VTIP| – |VRING|
PR to Battery Ground
PT to Battery Ground
OHT Mode:
44
—
—
51
—
—
—
56.5
56.5
V
V
|VBAT1| > 51 V (VOH = 0 V) |VTIP| – |VRING|
PR to Battery Ground
PT to Battery Ground
Active Mode (VOH = 0 V):
|PT – PR| – |VBAT2|
41
—
—
49
—
—
—
56.5
56.5
V
V
5.65
—
6.0
4.0
6.5
—
V
V
Ring Mode:
|PT – PR| – |VBAT1|
Agere Systems Inc.
17
AGERE [ AGERE SYSTEMS ]
