![](http://datasheet.mmic.net.cn/230000/NE687_datasheet_15597277/NE687_13.png)
0.1
0.4
0.8
1.0
1.5
2.0
2.5
3.0
4.0
5.0
0.869
0.690
0.453
0.376
0.295
0.312
0.359
0.409
0.510
0.599
-14.000
-53.600
-94.600
-113.100
-157.100
168.300
145.700
130.200
109.500
94.300
9.245
7.614
5.373
4.571
3.303
2.556
2.105
1.785
1.385
1.134
166.800
134.500
106.500
96.900
78.500
64.100
52.000
41.700
24.100
8.900
0.023
0.078
0.116
0.129
0.158
0.185
0.213
0.240
0.294
0.341
81.300
62.400
50.400
47.900
45.000
43.300
41.400
39.200
33.400
26.000
0.971
0.800
0.572
0.493
0.359
0.277
0.223
0.193
0.202
0.276
-9.100
-31.100
-46.200
-50.700
-59.700
-70.300
-85.000
-104.300
-147.000
-178.000
0.122
0.345
0.620
0.730
0.923
1.032
1.080
1.105
1.084
1.038
26.042
19.895
16.658
15.494
13.203
10.301
8.224
6.745
4.963
4.019
V
CE
= 1.0 V, I
C
= 10.0 mA
0.1
0.4
0.8
1.0
1.5
2.0
2.5
3.0
4.0
5.0
0.629
0.370
0.247
0.237
0.268
0.323
0.380
0.428
0.526
0.609
-29.300
-90.900
-141.800
-162.500
163.600
143.700
130.100
120.400
105.100
92.600
21.353
12.179
6.904
5.624
3.862
2.930
2.384
2.000
1.537
1.256
155.300
114.000
92.100
85.300
71.900
60.700
50.800
42.200
27.100
13.600
0.021
0.058
0.092
0.109
0.151
0.191
0.229
0.262
0.320
0.362
76.600
61.700
60.500
60.200
57.800
54.000
49.500
45.000
35.700
26.600
0.887
0.521
0.313
0.261
0.182
0.143
0.137
0.158
0.231
0.314
-19.700
-50.300
-61.900
-66.100
-80.300
-103.800
-132.500
-157.100
173.700
157.000
0.262
0.658
0.907
0.964
1.027
1.052
1.053
1.060
1.040
1.018
30.072
23.222
18.753
17.126
13.064
10.469
8.763
7.334
5.586
4.590
NE687 SERIES
TYPICAL SCATTERING PARAMETERS
(T
A
= 25
°
C)
Coordinates in Ohms
Frequency in GHz
(V
CE
= 1 V, I
C
= 1 mA)
NE68739
V
CE
= 1.0 V, I
C
= 1.0 mA
FREQUENCY
S
11
S
21
S
12
S
22
K
MAG
1
GHz
0.1
0.4
0.8
1.0
1.5
2.0
2.5
3.0
4.0
5.0
MAG
0.960
0.888
0.734
0.651
0.496
0.436
0.441
0.473
0.565
0.651
ANG
-7.500
-34.300
-67.000
-82.900
-122.300
-159.300
169.800
147.900
119.100
99.800
MAG
3.509
3.358
2.974
2.738
2.250
1.842
1.566
1.339
1.047
0.852
ANG
172.000
149.700
123.500
112.400
88.500
69.200
53.700
40.900
20.800
5.200
MAG
0.024
0.091
0.157
0.178
0.205
0.210
0.207
0.208
0.233
0.287
ANG
85.500
68.900
51.100
44.300
31.600
24.400
22.000
23.300
28.500
28.500
MAG
0.993
0.941
0.815
0.751
0.602
0.500
0.428
0.384
0.358
0.399
ANG
-4.600
-17.900
-32.000
-37.600
-49.100
-58.700
-69.200
-81.700
-113.400
-147.500
(dB)
21.650
15.670
12.774
11.870
10.404
9.431
8.323
5.769
3.876
3.064
0.055
0.181
0.362
0.440
0.642
0.834
1.006
1.146
1.192
1.074
20
10
5
4
3
2
1.5
1
.8
.6
.4
.2
-.2
-.4
-.6
-.8
-1
-1.5
-2
-3
-4
-5
-10
-20
0
20
10
1.5
.8
.6
.4
.2
5
S
11
4
3
2
1
S
22
0.1 GHz
0.1 GHz
S
22
5 GHz
S
11
5 GHz
90
270
180
225
315
135
45
0
2.5
S
12
0.1 GHz
S
21
5 GHz
S
12
5 GHz
S
21
0.1 GHz
0.25
V
CE
= 1.0 V, I
C
= 3.0 mA
Note:
1.Gain Calculations:
|S
21
|
|S
12
|
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
MAG =
K - 1
).
(
K
±
= S
11
S
22
- S
21
S
12
,
When K
≤
1, MAG is undefined and MSG values are used. MSG =
|S
21
|
|S
12
|
, K =
1 + |
| - |S
11
| - |S
22
|
2 |S
12
S
21
|
2