Datasheet
MAX2371/MAX2373
LNAs with Step Attenuator and VGA
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Table 2. MAX2373 S-Parameters
(V
CC
= 2.775V, RX_EN = high, LNA_I = high, RF_ATTN = low, P
IN
= -30dBm, T
A
= +25°C.)
LNA (S11) LNA (S21) LNA (S12) LNA (S22)
FREQUENCY
(MHz)
MAGNITUDE
PHASE
MAGNITUDE
PHASE
MAGNITUDE
PHASE
MAGNITUDE
PHASE
10
0.952248
-0.8171
7.273610
-178.830 0.002162 -89.276
1.000092
-0.8184
100
0.933405
-9.1461
7.077013
163.940 0.001346 78.684
0.993482
-2.3140
200
0.884179
-16.6570
6.529802
150.770 0.002137 32.634
0.991791
-3.8136
300
0.824784
-22.6500
5.929253
139.770 0.002217 72.860
0.983762
-5.6360
400
0.767609
-27.4800
5.400078
130.020 0.001332 86.532
0.971102
-7.2455
500
0.709643
-30.9910
4.904559
121.750 0.001641 86.431
0.958562
-8.9841
600
0.656682
-34.5840
4.431492
113.750 0.002297 70.617
0.955972
-10.7250
700
0.616673
-37.2530
4.016983
107.480 0.001701 105.050
0.946259
-12.1890
800
0.586388
-39.7830
3.644182
101.820 0.002688 73.619
0.941846
-13.4650
900
0.558837
-41.8580
3.313218
97.239 0.001077 143.410
0.933168
-15.1090
1000
0.536056
-42.9140
3.059039
92.435 0.001617 102.100
0.938912
-16.8900
1100
0.524439
-44.4030
2.805078
87.484 0.001442 151.320
0.932492
-18.5160
1200
0.516220
-45.9560
2.614027
82.687 0.002973 178.790
0.926200
-20.8080
1300
0.511487
-47.1900
2.417436
78.482 0.003764 -175.540
0.919094
-23.6930
1400
0.508259
-47.9420
2.253642
74.093 0.004195 -176.470
0.919952
-25.7200
1500
0.504028
-49.1020
2.090210
70.061 0.007366 -163.150
0.917498
-27.9410
1600
0.509736
-50.1550
1.975627
66.443 0.008200 -162.620
0.919486
-29.8050
1700
0.510000
-51.3530
1.841259
63.336 0.010929 -163.870
0.923092
-32.1340
1800
0.513009
-52.9500
1.719293
59.870 0.015327 -160.350
0.924634
-33.9510
1900
0.515994
-54.6510
1.597405
56.385 0.016692 -162.560
0.933781
-36.3470
2000
0.510141
-55.6650
1.467185
53.411 0.018843 -177.660
0.933039
-38.8240
Table 3. MAX2371 Typical Noise Parameters
(V
CC
= 2.775V, RX_EN = high, LNA_I = high, RF_ATTN = low, P
IN
= -30dBm, T
A
= +25°C, data from design simulation.)
FREQUENCY (MHz) NF
MIN
(dB) ⎜Γ
OPT
⎟∠ Γ
OPT
R
N
(Ω)
130 0.84 0.34 46.4 8.8
140 0.83 0.35 49.3 8.5
150 0.82 0.34 52.7 8.1
160 0.81 0.34 56.2 7.8
170 0.81 0.33 59.8 7.5
180 0.81 0.32 63.4 7.1