MAX2338EGI Maxim Integrated Products, MAX2338EGI Datasheet - Page 10

• Manufacturer Part Number: MAX2338EGI
• Description: RF Amplifier Triple/Dual-Mode CDM Mode CDMA LNA/Mixers
• Manufacturer: Maxim Integrated Products
• Type: CDMA LNA/Mixerr

Specifications of MAX2338EGI

• Supply Current: 28 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-28 EP
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The various operating modes are controlled by the logic
inputs BAND, GAIN, LIN, and LO/2. Table 1 shows the
pin settings for the various operating modes.
The LNA and mixer design optimizes cascaded perfor-
mance in all gain and linearity modes. In HGHL mode
both the LNA and mixer have a low noise figure, high
gain, and high linearity. The LNA has high gain to mini-
Triple/Dual-Mode CDMA LNA/Mixers
Table 2. MAX2338 Cellular Band LNA S-parameters High-Gain, High-Linearity Mode
10
FREQUENCY (MHz)
______________________________________________________________________________________
1000
1250
1500
1750
2000
2500
3000
3500
4000
100
150
200
300
400
500
600
700
800
810
820
830
840
850
860
870
880
890
900
30
50
Cascaded LNA/Mixer Performance
Applications Information
|
0.905
0.899
0.891
0.884
0.874
0.818
0.785
0.714
0.683
0.681
0.677
0.675
0.670
0.668
0.665
0.661
0.660
0.660
0.653
0.614
0.547
0.457
0.310
0.320
0.300
0.310
0.360
0.360
0.85
0.75
S11
Operational Modes
|
∠S11
-15.1
-21.8
-28.2
-41.6
-52.5
-63.5
-71.6
-79.8
-76.5
-77.0
-77.0
-78.0
-78.3
-78.8
-79.0
-79.5
-80.0
-80.4
-81.0
-97.0
-111
-131
-164
-5.4
-8.1
166
141
122
86
10
|
0.145
0.467
1.34
2.83
3.77
4.24
4.44
4.38
4.16
4.03
4.01
3.99
3.97
3.96
3.93
3.92
3.91
3.89
3.87
3.86
3.59
3.15
2.93
2.48
1.62
1.29
1.18
1.14
S21
2.2
2.1
|
mize the noise contribution of the mixer, thus increasing
the receiver’s sensitivity, and the LNA has high linearity
for cross-modulation suppression. The HGLL mode is
used when the transmitter is off and cross-modulation is
not a concern. In LGHL mode, the received signal is
strong enough that linearity is the primary concern. The
LNA gain is reduced for higher system linearity.
Use the S-parameters listed in the following tables to
design the RF matching circuits.
-157.5
∠S21
178.3
155.4
112.6
111.2
110.0
108.5
107.2
106.4
104.7
103.4
102.1
100.8
-108
-127
99.3
86.2
60.8
-112
140
125
-38
-57
-86
-40
-41
-66
-88
34
18
|
0.002
0.003
0.012
0.023
0.027
0.029
0.030
0.036
0.040
0.048
0.059
0.060
0.061
0.061
0.062
0.063
0.063
0.063
0.063
0.063
0.063
0.109
0.185
0.07
0.09
0.14
0.19
0.19
S12
0.2
0.2
|
∠S12
165.8
-13.2
-126
-174
-150
83.0
82.8
82.0
80.9
80.6
79.2
78.1
77.2
76.5
75.4
73.5
176
137
127
112
136
-55
-36
-62
-98
98
90
20
90
43
|
0.793
0.798
0.800
0.799
0.792
0.782
0.769
0.753
0.733
0.710
0.690
0.680
0.650
0.610
0.580
0.490
0.360
0.500
0.480
0.98
0.94
0.96
0.96
0.95
0.93
0.90
0.94
0.87
0.84
0.41
S22
S-Parameters
|
∠S22
-117
-144
-162
-172
67.5
66.5
65.7
65.0
64.2
63.4
62.7
61.8
60.6
59.4
57.7
51.8
15.9
-9.6
155
129
100
-47
-72
-33
-70
-64
-61
-50
78
37