RF250 데이터 시트보기 (PDF) - Conexant Systems
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RF250 Datasheet PDF : 17 Pages
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RF250
60
50
40
30
-30 deg C
20
25 deg C
80 deg C
10
0
2.4 2.6 2.8
3
3.2 3.4 3.6 3.8
Vcc (V)
Figure 21. VGA + I/Q Gain in PCS Mode
(Vcontrol = 2.7 V, Frequency = 210.38 MHz)
0
-10
-20
-30
-40
-50
-60
-70
2.4 2.6 2.8
-30 deg C
25 deg C
80 deg C
3
3.2 3.4 3.6 3.8
Vcc (V)
Figure 23. VGA + I/Q IIP3 at Maximum Gain in PCS
Mode
60
40
20
0
2.7 V
-20
3.0 V
3.3 V
-40
3.6 V
-60
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6
Vcontrol (V)
Figure 25. VGA + I/Q Gain vs. Control Voltage in
Cellular
Mode (Frequency = 85.38 MHz)
Rx ASIC
6
5
4
3
-30 deg C
2
25 deg C
1
80 deg C
0
2.4 2.6 2.8
3
3.2 3.4 3.6 3.8
Vcc (V)
Figure 22. VGA Noise Figure in PCS Mode
(Vcontrol = 2.7 V, Frequency = 210.38 MHz)
80
60
40
20
0
-30 deg C
-20
25 deg C
-40
80 deg C
-60
0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4
Vcontrol (V)
Figure 24. VGA + I/Q Gain Over Temperature
(Frequency = 85.38 MHz)
70
60
50
40
30
-30 deg C
20
25 deg C
10
80 deg C
0
2.4 2.6 2.8
3
3.2 3.4 3.6 3.8
Vcc (V)
Figure 26. Supply Current in The Cellular Band
101251A
Conexant Systems, Inc.
13
August 24, 2000
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