DEMO-ALM-81224 Datasheet, PDF (5/23 Pages) Broadcom Corporation. – High Linearity 1450 – 2750 MHz Variable Gain Amplifier

Typical 1485 MHz RF Performance Plots
Application circuit and build of material can be seen in Figure 70 and Table 3 respectively.
0
-5
-10
-15
-20
-25
-30
-35
-40
0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
Figure 8. S11 vs Freq at 1485 MHz
25° C
-40° C
85° C
3.5 4.0
0
-3
-6
-9
-12
-15
-18
0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
Figure 9. S22 vs Freq at 1485 MHz
25° C
-40° C
85° C
3.5 4.0
30
25
20
15
10
5
0
-5
-10
0.5 1.0 1.5 2.0 2.5 3.0
Frequency (GHz)
Figure 10. S21 vs Freq at 1485 MHz
25° C
-40° C
85° C
3.5 4.0
30
36
25
32
20
28
15
24
10
20
5
Gain
Noise Figure
16
0
12
-5
8
-10
4
-15
0
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6
Vc_Att (V)
Figure 11. Gain & Noise Figure vs Vc_att at 1485 MHz at 25° C
30
36
25
32
20
28
15
24
10
20
5
Gain
Noise Figure
16
0
12
-5
8
-10
4
-15
0
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6
Vc_Att (V)
Figure 12. Gain & Noise Figure vs Vc_att at 1485 MHz at -40° C
30
36
25
32
20
28
15
24
10
20
5
Gain
Noise Figure
16
0
12
-5
8
-10
4
-15
0
0.0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6
Vc_Att (V)
Figure 13. Gain & Noise Figure vs Vc_att at 1485 MHz at 85° C
5