ATTL7554AP Просмотр технического описания (PDF) - Agere -> LSI Corporation
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ATTL7554AP Datasheet PDF : 28 Pages
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Data Sheet
March 1997
L7554 Low-Power SLIC
Applications (continued)
Characteristic Curves (continued)
1500
1000
500
0
0
500
1000
1500
2000
LOOP RESISTANCE, RLOOP (Ω)
Note: VBAT = –48 V; ILIM = 22 mA; RDC1 = 113 Ω.
12-3052 (C)
Figure 21. 7551 Typical SLIC Power Dissipation vs.
Loop Resistance
8
7
6
49 dB, RP MATCHED TO 1.5 Ω
5
4
3
2
1 58 dB, RP MATCHED
TO 0.5 Ω
0
0
20
40
60
80
100 120
PROTECTION RESISTOR VALUE (Ω)
12-3019 (C)
Figure 23. Longitudinal Balance Resistor Mismatch
Requirements
60
2000
55
1500
1000
500
STILL AIR
47 °C/W
300 cu. ft./ min.
36 °C/W
0
20 40 60 80 100 120 140 160 180
AMBIENT TEMPERATURE, TA (°C)
12-2825 (C)
Figure 22. Power Derating
50
45
40
0.0
0.5
1.0
1.5
2.0
2.5
PROTECTION RESISTOR MISMATCH (Ω)
12-3021 (C)
Figure 24. Longitudinal Balance vs. Protection
Resistor Mismatch
Lucent Technologies Inc.
19
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