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ATF-521P8 Typical Scattering Parameters at 25
°C, V
DS = 4.5V, IDS = 280 mA
Freq.
S11
S21
S12
S22
MSG/MAG
GHz
Mag.
Ang.
dB
Mag.
Ang.
dB
Mag.
Ang.
Mag.
Ang.
dB
0.1
0.613
-96.9
33.2
45.79
141.7
-39.5
0.011
51.3
0.317
-108.3
36.2
0.2
0.780
-131.8
30.0
31.50
121.6
-36.7
0.015
37.1
0.423
-138.5
33.2
0.3
0.831
-147.2
27.3
23.26
111.0
-36.2
0.015
30.6
0.466
-152.4
31.9
0.4
0.855
-156.4
25.1
18.04
104.1
-35.4
0.017
28.2
0.483
-159.9
30.3
0.5
0.860
-162.0
23.5
14.98
99.7
-35.2
0.017
27.4
0.488
-163.8
29.5
0.6
0.878
-166.7
22.0
12.62
95.6
-35.0
0.018
26.1
0.496
-167.0
28.5
0.7
0.888
-170.2
20.8
10.95
92.8
-34.6
0.019
27.4
0.497
-169.9
27.6
0.8
0.887
-172.6
19.7
9.63
90.0
-34.3
0.019
28.9
0.500
-171.7
27.0
0.9
0.894
-174.5
18.7
8.65
87.9
-33.7
0.021
28.5
0.501
-173.6
26.1
1.0
0.886
-177.2
17.9
7.82
85.4
-33.8
0.020
30.3
0.502
-175.7
25.9
1.5
0.892
175.0
14.3
5.20
76.3
-32.8
0.023
34.6
0.502
178.8
23.5
2.0
0.883
168.7
12.1
4.01
68.4
-31.2
0.027
36.7
0.492
173.6
20.2
2.5
0.890
162.8
10.2
3.24
61.5
-30.0
0.032
36.8
0.490
169.8
18.5
3.0
0.884
157.2
8.6
2.71
54.5
-28.9
0.036
39.2
0.494
165.7
16.2
4.0
0.890
146.6
6.1
2.02
40.6
-27.0
0.045
36.1
0.505
157.8
13.8
5.0
0.893
137.0
4.1
1.60
27.6
-25.5
0.053
32.4
0.529
150.3
11.9
6.0
0.896
127.9
2.3
1.31
15.4
-24.2
0.061
28.2
0.551
142.9
10.4
7.0
0.906
119.5
0.9
1.11
3.7
-22.9
0.071
22.9
0.570
135.5
9.6
8.0
0.882
105.6
-0.8
0.92
-9.8
-21.3
0.086
14.5
0.567
127.3
6.8
9.0
0.887
96.4
-1.7
0.82
-22.2
-20.1
0.098
7.2
0.585
117.8
6.2
10.0
0.887
84.6
-2.9
0.72
-33.6
-19.3
0.109
-1.0
0.593
107.3
5.0
11.0
0.882
72.3
-3.9
0.64
-45.8
-18.5
0.119
-10.5
0.617
97.1
3.9
12.0
0.878
62.2
-5.0
0.56
-57.0
-18.0
0.126
-19.8
0.636
86.0
2.8
13.0
0.894
52.0
-6.4
0.48
-67.8
-17.8
0.130
-28.6
0.662
74.7
2.1
14.0
0.888
42.0
-7.6
0.42
-76.2
-17.3
0.137
-36.1
0.697
67.5
0.9
15.0
0.884
34.6
-8.3
0.38
-84.3
-16.6
0.147
-42.9
0.732
58.7
0.3
16.0
0.830
24.7
-9.5
0.34
-92.8
-16.1
0.156
-52.4
0.752
51.9
-1.8
17.0
0.708
11.0
-9.0
0.35
-99.5
-15.4
0.169
-63.8
0.816
46.1
-2.2
18.0
0.790
-12.7
-10.3
0.31
-93.1
-16.4
0.152
-82.8
0.660
41.2
-4.3
Freq
Fmin
Γopt
Γopt
Rn
Ga
GHz
dB
Mag.
Ang.
dB
0.5
1.20
0.47
170.00
2.8
22.8
1.0
1.30
0.53
-177.00
2.6
20.1
2.0
1.61
0.61
-166.34
2.7
17.3
3.0
1.68
0.69
-155.85
4.0
14.4
4.0
2.12
0.67
-146.98
8.4
11.6
5.0
2.77
0.71
-134.35
19.0
9.9
6.0
2.58
0.79
-125.22
26.7
8.8
7.0
2.85
0.82
-115.35
47.2
7.5
8.0
3.35
0.73
-105.76
65.2
5.7
Notes:
1. Fmin values at 2 GHz and higher are based on measurements while the Fmins below 2 GHz have been extrapolated. The Fmin values are based on a set of
16 noise figure measurements made at 16 different impedances using an ATN NP5 test system. From these measurements a true Fmin is calculated.
Refer to the noise parameter application section for more information.
2. S and noise parameters are measured on a microstrip line made on 0.025 inch thick alumina carrier. The input reference plane is at the end of the gate
lead. The output reference plane is at the end of the drain lead.
Typical Noise Parameters at 25
°C, VDS = 4.5V, IDS = 280 mA
Figure 40. MSG/MAG and |S21|
2 vs.
Frequency at 4.5V, 280 mA.
MAG
S21
FREQUENCY (GHz)
020
10
515
40.0
30.0
20.0
10.0
0.0
-10.0
-20.0
MSG
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