max2338 Maxim Integrated Products, Inc., max2338 Datasheet - Page 11

• Manufacturer Part Number: max2338
• Description: Max2338 Triple/dual-mode Cdma Lna/mixers
• Manufacturer: Maxim Integrated Products, Inc.

Keep RF signal lines as short as possible to minimize
losses and radiation. Use high Q components for the
LNA input-matching circuit to achieve the lowest possi-
ble noise figure. At the digital mixer outputs, keep the
differential signal lines together and of equal length to
ensure signal balance. For best gain and noise perfor-
mance, solder the exposed paddle evenly to the board
ground plane.
Table 3. MAX2338 PCS Band LNA S-Parameters High-Gain, High-Linearity Mode
FREQUENCY (MHz)
1000
1200
1500
1750
1900
1910
1920
1930
1940
1950
1960
1970
1980
1990
2000
2250
2500
3000
4000
100
200
300
400
600
800
30
50
______________________________________________________________________________________
Layout Considerations
|
0.890
0.883
0.872
0.841
0.799
0.778
0.750
0.706
0.676
0.659
0.634
0.578
0.560
0.558
0.554
0.551
0.547
0.543
0.538
0.536
0.533
0.530
0.523
0.347
0.298
0.273
0.245
S11
Triple/Dual-Mode CDMA LNA/Mixers
|
∠S11
-13.2
-90.8
-91.0
-91.4
-91.7
-92.2
-92.2
-92.4
-92.5
-92.9
-93.0
-93.4
-108
-110
-155
-158
-160
-170
-4.9
-7.2
-25
-35
-41
-62
-75
-85
-94
|
0.002
0.001
0.391
0.882
1.42
2.15
2.45
2.59
3.03
3.58
3.64
3.64
3.64
3.63
3.63
3.63
3.63
3.61
3.60
3.59
3.57
2.88
2.71
2.64
2.03
S21
2.1
2.2
|
∠S21
120.6
119.6
118.9
118.2
117.7
117.0
116.5
115.9
115.2
114.7
113.0
-112
-131
-153
-172
-165
-145
162
150
142
134
126
131
172
-95
-60
-81
0.001
0.001
0.002
0.007
0.010
0.025
0.029
0.032
0.036
0.038
0.067
|S12|
0.02
0.02
0.04
0.04
0.04
0.04
0.04
0.04
0.04
0.04
0.04
0.04
0.04
0.05
0.05
0.06
∠S12
-112
-121
-178
-120
11.8
9.06
4.87
-2.1
171
150
125
100
-32
-72
-94
8.8
6.7
5.3
4.1
1.8
1.5
80
65
42
31
19
0
|
0.996
0.990
0.980
0.970
0.959
0.947
0.943
0.944
0.919
0.879
0.824
0.780
0.740
0.738
0.733
0.729
0.725
0.720
0.716
0.716
0.711
0.707
0.702
0.518
0.489
0.473
0.425
S22
|
∠S22
-114
-150
-166
-173
94.4
61.7
60.7
59.6
58.5
57.4
56.1
55.0
53.6
52.3
50.9
49.5
173
151
133
115
-48
-73
-18
-30
81
24
5
11