GaAs HJ-FET L TO S BAND
LOW NOISE AMPLIFIER
(New Plastic Package)
FEATURES
• LOW COST MINIATURE PLASTIC PACKAGE
(SOT-343)
• LOW NOISE FIGURE:
0.6 dB typical at 2 GHz
• HIGH ASSOCIATED GAIN:
16.0 dB typical at 2 GHz
• L
G
= 0.6
µ
m, W
G
= 400
µ
m
• TAPE & REEL PACKAGING
4
NE34018
NOISE FIGURE & ASSOCIATED
GAIN vs. FREQUENCY
V
DS
= 3 V, I
DS
= 20 mA
25
20
Noise Figure, NF (dB)
3
15
10
2
5
0
DESCRIPTION
NEC's NE34018 is a low cost gallium arsenide Hetero-Junc-
tion FET housed in a miniature (SOT-343) plastic surface
mount package. The device is fabricated using ion implanta-
tion for improved RF and DC performance, reliability, and
uniformity. Its low noise figure, high gain, small size and
weight make it an ideal low noise amplifier transistor in the 1-
3 GHz frequency range. The NE34018 is suitable for GPS,
PCS, WLAN, MMDS, and other commercial applications.
NEC's stringent quality assurance and test procedures en-
sure the highest reliability and performance.
1
NF
0
0.5
1
2
3
4
5 6 7 8 910
Frequency, f (GHz)
18 Package
SOT-343 Style
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C)
PART NUMBER
PACKAGE OUTLINE
SYMBOL
NF
G
A
P
1dB
PARAMETERS AND CONDITIONS
Noise Figure at V
DS
= 2 V, I
D
= 5 mA, f = 2 GHz
Associated Gain at V
DS
= 2 V, I
D
= 5 mA, f = 2 GHz
Output Power at 1 dB Gain Compression Point, f = 2 GHz
V
DS
= 2 V, I
DS
= 10 mA
V
DS
= 3 V, I
DS
= 30 mA
Gain at P
1dB
, f = 2 GHz
V
DS
= 2 V, I
DS
= 10 mA
V
DS
= 3 V, I
DS
= 30 mA
Output I
P3
at f = 2 GHz,
∆f
= 1 MHz
V
DS
= 2 V, I
DS
= 10 mA
V
DS
= 2 V, I
DS
= 30 mA
Saturated Drain Current at V
DS
= 2 V, V
GS
= 0 V
Pinch Off Voltage at V
DS
= 2 V, I
D
= 100
µA
Transconductance at V
DS
= 2 V, I
D
= 5 mA
Gate to Source Leakage Current at V
GS
= -3 V
Thermal Resistance (Channel to Ambient)
UNITS
dB
dB
dBm
dBm
dB
dB
dBm
dBm
mA
V
mS
µA
˚C/W
30
-2.0
30
0.5
833
10
14.0
MIN
NE34018
18
TYP
0.6
16.0
12
16.5
17.0
17.5
23
32
80
-0.8
120
-0.2
MAX
1.0
G
1dB
O/P I
P3
I
DSS
V
P
g
m
I
GSO
R
TH(CH-A)
Note:
1. Typical values of noise figures and associated gain are those obtained when 50% of the devices from a large number of lots were individually
measured in a circuit with the input individually tuned to obtain the minimum value. Maximum values are criteria established on the production
line as a "go-no-go" screening test with the fixture tuned for the "generic" type but not for each specimen.
California Eastern Laboratories
Associated Gain, G
A
(dB)
G
A
NE34018
TYPICAL SCATTERING PARAMETERS
(T
A
= 25°C)
.8
.6
.4
1
90˚
1.5
2
135˚
S
11
8 GHz
S
22
8 GHz
3
4
5
45˚
.2
S
22
0.5 GHz
1
1.5
2
3
4 5
10 20
10
20
S
21
0.5 GHz
180˚
0
.2
.4 .6
.8
S
12
0.5 GHz
1.00
2.00
3.00
0.05
0.10 0.15
-20
-10
-.2
-3
-.4
-2
-.6
-.8
-1
-1.5
-5
-4
0˚
S
12
S
11
0.5 GHz
S
21
8 GHz
315˚
8 GHz
225˚
4.00
5.00
270˚
V
DS
= 2 V, I
DS
= 5 mA
FREQUENCY
(GHz)
0.50
0.60
0.70
0.80
0.90
1.00
1.20
1.40
1.60
1.80
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
8.00
Note:
1. Gain Calculations:
MAG =
|S
21
|
|S
12
|
2
2
2
|S
21
|
, K = 1 + |
∆
| - |S
11
| - |S
22
|
,
∆
= S
11
S
22
- S
21
S
12
|S
12
|
2 |S
12
S
21
|
S
11
MAG
0.984
0.979
0.973
0.965
0.958
0.949
0.930
0.906
0.881
0.853
0.821
0.737
0.648
0.569
0.512
0.482
0.472
0.468
0.464
0.456
0.441
0.422
0.411
ANG
-15.1
-18.0
-21.0
-23.9
-26.8
-29.8
-35.7
-41.5
-47.5
-53.6
-59.8
-76.3
-94.2
-113.6
-133.0
-150.9
-165.2
-175.7
176.0
167.9
158.2
144.3
127.5
S
21
MAG
4.945
4.908
4.899
4.871
4.843
4.825
4.783
4.723
4.660
4.605
4.531
4.332
4.092
3.805
3.516
3.248
3.025
2.846
2.714
2.601
2.505
2.417
2.321
ANG
165.0
162.3
159.4
156.7
153.9
151.1
145.6
140.2
134.7
129.3
123.8
110.5
97.6
85.3
73.9
63.8
54.7
46.4
38.4
30.5
22.1
13.3
4.0
MAG
S
12
ANG
80.6
78.9
77.0
75.3
73.7
72.1
68.7
65.4
62.2
59.1
56.0
48.2
41.4
35.3
30.5
27.2
25.3
24.5
23.7
22.4
20.2
18.0
15.0
MAG
0.020
0.023
0.027
0.031
0.034
0.038
0.045
0.052
0.058
0.064
0.070
0.082
0.092
0.098
0.102
0.105
0.108
0.112
0.118
0.126
0.134
0.142
0.151
S
22
ANG
-7.2
-8.6
-10.0
-11.5
-12.9
-14.4
-17.3
-20.2
-23.1
-26.0
-28.9
-36.0
-42.4
-47.7
-51.8
-54.9
-57.8
-61.0
-65.4
-71.6
-80.8
-92.2
-105.9
0.807
0.803
0.798
0.793
0.788
0.781
0.767
0.751
0.734
0.715
0.696
0.648
0.600
0.556
0.518
0.480
0.444
0.405
0.367
0.331
0.302
0.283
0.281
K
0.135
0.152
0.174
0.195
0.213
0.231
0.270
0.314
0.354
0.395
0.438
0.542
0.643
0.748
0.845
0.932
1.004
1.068
1.107
1.130
1.149
1.161
1.152
MAG
1
(dB)
23.931
23.292
22.587
21.963
21.536
21.037
20.265
19.582
19.050
18.570
18.111
17.229
16.481
15.891
15.374
14.904
14.074
12.459
11.622
10.955
10.372
9.874
9.503
(
K
±
K
2
- 1
).
When K
≤
1, MAG is undefined and MSG values are used. MSG =
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
NE34018
TYPICAL SCATTERING PARAMETERS
(T
A
= 25°C)
.8
.6
.4
3
.2
1
90˚
1.5
2
135˚
S
11
8 GHz
S
22
8 GHz
S
22
0.5 GHz
1
1.5
2
3
4 5
10 20
45˚
4
5
10
20
S
21
0.5 GHz
180˚
S
12
0.5 GHz
0.05
0.10
0.15
0
.2
.4
.6
.8
-20
-10
-.2
-3
-.4
-2
-.6
-.8
-1
-1.5
-5
-4
S
11
0.5 GHz
2.50
S
21
8 GHz
0˚
S
12
8 GHz
225˚
5.00
315˚
270˚
V
DS
= 2 V, I
DS
= 10 mA
FREQUENCY
(GHz)
0.50
0.60
0.70
0.80
0.90
1.00
1.20
1.40
1.60
1.80
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
8.00
Note:
1. Gain Calculations:
MAG =
|S
21
|
|S
12
|
S
11
MAG
0.978
0.969
0.960
0.949
0.938
0.924
0.897
0.865
0.831
0.796
0.757
0.658
0.563
0.483
0.432
0.409
0.406
0.408
0.411
0.408
0.397
0.383
0.376
ANG
-17.0
-20.3
-23.6
-26.9
-30.1
-33.3
-39.8
-46.0
-52.4
-58.7
-65.1
-81.9
-100.1
-119.7
-139.4
-157.2
-171.0
179.2
171.4
163.8
154.5
140.6
123.6
MAG
6.806
6.731
6.691
6.624
6.559
6.502
6.371
6.217
6.065
5.912
5.750
5.336
4.909
4.478
4.080
3.733
3.448
3.223
3.050
2.906
2.782
2.672
2.560
S
21
ANG
162.8
159.7
156.5
153.4
150.3
147.2
141.2
135.3
129.5
123.9
118.3
105.0
92.4
80.8
70.2
60.8
52.3
44.5
37.0
29.4
21.5
13.2
4.4
MAG
0.018
0.022
0.025
0.028
0.032
0.035
0.041
0.047
0.053
0.058
0.063
0.074
0.083
0.091
0.097
0.103
0.109
0.117
0.126
0.136
0.145
0.156
0.166
S
12
ANG
80.1
78.7
77.3
75.5
73.6
72.4
69.2
66.3
63.4
60.7
58.1
51.7
46.5
41.8
38.1
35.1
33.2
31.6
29.9
27.5
24.1
20.8
16.5
MAG
S
22
ANG
-7.5
-9.1
-10.5
-12.0
-13.4
-14.9
-17.8
-20.6
-23.4
-26.1
-28.8
-35.3
-41.2
-45.9
-49.5
-53.3
-53.8
-55.6
-58.3
-62.8
-71.3
-83.2
-99.5
0.723
0.719
0.712
0.706
0.698
0.690
0.673
0.655
0.635
0.614
0.594
0.546
0.501
0.463
0.429
0.388
0.363
0.327
0.293
0.259
0.232
0.211
0.204
K
0.178
0.200
0.224
0.253
0.281
0.307
0.356
0.410
0.460
0.509
0.560
0.677
0.782
0.873
0.952
1.018
1.057
1.085
1.097
1.106
1.117
1.112
1.104
MAG
1
(dB)
25.776
24.857
24.276
23.740
23.117
22.690
21.914
21.215
20.586
20.083
19.603
18.580
17.719
16.920
16.239
14.771
13.538
12.618
11.939
11.320
10.752
10.298
9.917
(
K
±
K
2
- 1
).
When K
≤
1, MAG is undefined and MSG values are used. MSG =
2
2
2
|S
21
|
, K = 1 + |
∆
| - |S
11
| - |S
22
|
,
∆
= S
11
S
22
- S
21
S
12
|S
12
|
2 |S
12
S
21
|
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
NE34018
TYPICAL SCATTERING PARAMETERS
(T
A
= 25°C)
V
DS
= 2 V, I
DS
= 20 mA
FREQUENCY
(GHz)
0.50
0.60
0.70
0.80
0.90
1.00
1.20
1.40
1.60
1.80
2.00
2.50
3.00
3.50
4.00
4.50
5.00
5.50
6.00
6.50
7.00
7.50
8.00
Note:
1. Gain Calculations:
MAG =
|S
21
|
|S
12
|
S
11
MAG
0.969
0.958
0.946
0.931
0.916
0.899
0.864
0.825
0.785
0.745
0.701
0.596
0.499
0.422
0.374
0.357
0.359
0.366
0.372
0.372
0.365
0.353
0.348
ANG
-18.6
-22.1
-25.7
-29.2
-32.7
-36.1
-42.9
-49.3
-55.8
-62.1
-68.6
-85.3
-103.3
-123.1
-142.9
-160.6
-174.1
176.6
169.3
162.1
153.0
139.1
122.0
MAG
8.533
8.416
8.331
8.211
8.092
7.982
7.737
7.469
7.205
6.948
6.692
6.075
5.495
4.953
4.477
4.073
3.745
3.487
3.285
3.118
2.975
2.852
2.729
S
21
ANG
160.8
157.3
153.8
150.4
147.1
143.7
137.3
131.1
125.2
119.5
113.9
100.9
88.9
77.8
67.8
58.9
50.9
43.4
36.2
29.0
21.4
13.4
5.0
MAG
0.017
0.020
0.023
0.026
0.029
0.032
0.037
0.043
0.048
0.053
0.058
0.069
0.079
0.088
0.096
0.104
0.112
0.122
0.133
0.144
0.154
0.165
0.176
S
12
ANG
81.2
79.4
77.8
76.4
75.1
73.8
71.1
68.5
66.1
63.8
61.7
56.6
52.0
47.9
44.3
41.1
38.6
36.2
33.6
30.4
26.4
22.2
17.4
MAG
S
22
ANG
-7.3
-8.8
-10.2
-11.6
-12.9
-14.3
-16.9
-19.4
-21.8
-24.2
-26.5
-32.4
-37.8
-42.4
-45.8
-47.7
-48.8
-49.1
-50.0
-52.7
-60.2
-72.2
-91.3
0.635
0.631
0.624
0.617
0.610
0.601
0.584
0.566
0.547
0.527
0.509
0.467
0.428
0.397
0.369
0.340
0.310
0.278
0.248
0.219
0.193
0.169
0.156
K
0.221
0.256
0.289
0.324
0.354
0.387
0.451
0.512
0.570
0.623
0.675
0.786
0.879
0.952
1.009
1.047
1.073
1.084
1.084
1.086
1.090
1.088
1.079
MAG
1
(dB)
27.007
26.241
25.590
24.994
24.457
23.970
23.204
22.398
21.764
21.176
20.621
19.447
18.423
17.504
16.118
14.596
13.589
12.796
12.160
11.571
11.031
10.569
10.189
(
K
±
K
2
- 1
).
When K
≤
1, MAG is undefined and MSG values are used. MSG =
2
2
2
|S
21
|
, K = 1 + |
∆
| - |S
11
| - |S
22
|
,
∆
= S
11
S
22
- S
21
S
12
|S
12
|
2 |S
12
S
21
|
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
51mcu
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