GaAs PHEMT Switchable Gain LNA
AL108-338
Pin Out (Top View)
Package Outline (Bottom View)
Gain Control
Bias Voltage
0.040 TYP.
13
16
1000 pF
1000 pF
12
1
0.026 TYP.
N/C
N/C
1
12
11
0.157
2
RF
Output
RF
Input
0.013
TYP.
N/C
N/C
N/C
N/C
3
4
10
9
4
9
0.014
TYP.
8
5
0.157
Ground is connected to paddle on bottom.
Truth Table
Low Gain
V
= 5 V
= 0 V
C
High Gain
V
C
Typical S-Parameters (Control Voltage 0/+5 V)
Low Gain State
High Gain State
# GHZ S MA R 50
# GHZ S MA R 50
Freq.
(GHz)
1.0
1.5
2.0
2.5
3.0
4.0
4.5
5.0
5.5
6.0
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
S
22a
11
11a
21
21a
12
12a
22
22a
11
11a
21
21a
12
12a
22
0.0531 65.99 0.1093 132.60 0.0081 25.28 0.2937 -93.69 0.5023 11.44 0.2221 -171.21 0.0013 -19.22 0.2935 -93.51
0.1204 91.60 0.4417 2.26 0.0054 -24.99 0.2428 -84.55 0.3677 -60.06 2.2489 65.05 0.0055 91.43 0.2265 -86.97
0.1362 14.12 1.3032 -101.06 0.0042 -17.39 0.2899 -73.12 0.4475 -131.33 10.3201 -81.96 0.0066 97.84 0.346 -60.19
0.1651 -29.48 2.5615 153.17 0.0024 11.52 0.323 -74.12 0.1954 -1.39 13.8498 143.35 0.0036 69.36 0.359 -88.94
0.1572 13.82 3.7729 53.89 0.0059 35.81 0.3019 -83.48 0.1133 -15.23 13.6149 42.94 0.0062 70.40 0.2228 -80.36 4
0.4082 4.29
2.9632 -128.83 0.0055 -55.78 0.0637 17.93 0.2741 -14.00 10.2202 -144.57 0.006 -16.85 0.0713 12.81
0.5055 -4.96 1.9123 157.00 0.0063 -83.69 0.267 36.24 0.324 -9.03 5.7473 131.66 0.0009 -29.68 0.2643 34.37
0.5351 -14.30 1.1534 92.88 0.0027 -148.15 0.3803 26.63 0.3458 -8.19 2.7131 59.91 0.003 -119.30 0.3786 27.80
0.4906 -31.11 0.6649 35.33 0.0062 -179.25 0.4498 21.69 0.2818 -14.80 1.1847 0.28 0.0025 -177.50 0.4481 20.63
0.2427 -72.20 0.3686 -25.59 0.0079 138.81 0.44 18.28 0.1318 34.49 0.4931 -55.56 0.0039 170.99 0.4398 18.02
Measured S-Parameters represent the packaged device.
Alpha Industries, Inc. [978] 241-7000 • Fax [978] 241-7906 • Email sales@alphaind.com • www.alphaind.com
3
Specifications subject to change without notice. 1/02A
ALPHA [ ALPHA INDUSTRIES ]
