BF998B-GS18 Vishay, BF998B-GS18 Datasheet - Page 3

• Manufacturer Part Number: BF998B-GS18
• Manufacturer: Vishay

Specifications of BF998B-GS18

• Application: UHF
• Channel Type: N
• Channel Mode: Depletion
• Continuous Drain Current: 0.03A
• Drain Source Voltage (max): 12V
• Power Gain (typ)@vds: 28@8VdB
• Noise Figure (max): 1.5(Typ)dB
• Package Type: SOT-143
• Pin Count: 3 +Tab
• Forward Transconductance (typ): 0.024S
• Input Capacitance (typ)@vds: 2.1@8V@Gate 1/1.1@8V@Gate 2pF
• Output Capacitance (typ)@vds: 1.05@8VpF
• Reverse Capacitance (typ): 0.025@8VpF
• Operating Temp Range: -65C to 150C
• Mounting: Surface Mount
• Number Of Elements: 1
• Power Dissipation (max): 200mW
• Screening Level: Military
• Lead Free Status / Rohs Status: Compliant

Common Source S-Parameters
T
V
Document Number 85011
Rev. 1.6, 31-Aug-05
Power gain
AGC range
Noise figure
amb
DS
ID/mA
= 8 V, V
= 25 °C, unless otherwise specified
10
15
5
Parameter
G2S
= 4 V, Z
f/MHz
1000
1100
1200
1300
1000
1100
1200
1300
1000
1100
1200
1300
100
200
300
400
500
600
700
800
900
100
200
300
400
500
600
700
800
900
100
200
300
400
500
600
700
800
900
0
= 50 Ω
MAG
-0.03
-0.15
-0.34
-0.70
-1.03
-1.33
-1.62
-1.92
-2.21
-2.49
-2.80
-3.07
-3.31
-0.05
-0.16
-0.48
-0.76
-1.11
-1.43
-1.75
-2.07
-2.40
-2.70
-3.03
-3.32
-3.59
-0.05
-0.17
-0.50
-0.81
-1.18
-1.52
-1.86
-2.20
-2.53
-2.86
-3.21
-3.50
-3.80
LOG
G
f = 200 MHz
G
f = 800 MHz
V
G
f = 200 MHz
G
f = 800 MHz
G2S
S
S
S
S
= 2 mS, G
= 3,3 mS, G
= 2 mS, G
= 3,3 mS, G
S11
= 4 to -2 V, f = 800 MHz
Test condition
-14.1
-20.9
-32.1
-39.2
-45.8
-52.3
-58.7
-64.7
-70.7
-76.6
-82.5
-88.6
-18.7
-26.0
-33.7
-41.2
-48.3
-55.1
-61.6
-67.9
-74.2
-80.2
-86.4
-92.3
-19.4
-27.1
-35.0
-42.9
-50.3
-57.2
-63.9
-70.4
-76.8
-82.9
-89.0
-95.1
ANG
deg
-7.2
-9.0
-9.4
L
L
= 0.5 mS,
= 0.5 mS,
L
L
= 1 mS,
= 1 mS,
MAG
-0.10
-0.59
-1.12
-1.52
-1.93
-2.35
-0.28
LOG
5.71
5.51
5.20
2.01
1.45
0.94
0.43
5.19
5.58
4.45
3.95
3.40
2.88
2.39
1.88
1.39
0.90
0.50
0.13
6.07
6.44
5.31
4.80
4.23
3.72
3.22
2.72
2.24
1.74
1.34
0.95
0.56
BF998 / BF998R / BF998RW
S21
Symbol
∆G
168.8
157.3
134.7
121.3
108.4
165.3
151.8
136.3
123.3
110.9
165.4
152.0
136.7
123.8
111.5
100.3
G
G
ANG
96.5
85.0
74.1
63.6
53.1
43.7
33.6
24.1
99.5
88.7
78.1
67.9
57.9
48.7
38.9
29.6
89.6
79.4
69.2
59.4
50.2
40.8
31.5
deg
F
F
ps
ps
ps
-55.94
-50.26
-48.51
-46.98
-46.40
-46.40
-47.02
-47.53
-47.81
-48.52
-48.53
-46.95
-44.44
-56.24
-49.97
-47.91
-46.48
-45.91
-45.91
-46.53
-47.13
-47.41
-48.21
-48.43
-47.04
-44.54
-55.74
-49.47
-47.41
-45.98
-45.41
-45.41
-46.13
-46.63
-47.00
-47.91
-48.33
-47.04
-44.53
16.5
MAG
Min
LOG
40
S12
Vishay Semiconductors
102.1
120.4
131.7
118.2
130.5
115.3
128.7
ANG
Typ.
83.6
76.8
67.7
62.8
57.8
57.3
58.9
63.3
73.1
83.5
81.9
75.0
67.2
61.8
56.3
55.8
56.7
60.7
69.9
80.0
98.9
81.4
74.6
66.4
60.8
55.1
54.4
54.9
58.5
67.3
76.7
95.2
1.0
1.5
deg
28
20
-0.08
-0.13
-0.29
-0.44
-0.59
-0.76
-0.91
-1.08
-1.26
-1.45
-1.57
-1.75
-1.92
-0.11
-0.21
-0.33
-0.47
-0.65
-0.81
-0.96
-1.12
-1.32
-1.49
-1.61
-1.79
-1.96
-0.15
-0.24
-0.36
-0.52
-0.68
-0.84
-1.02
-1.16
-1.35
-1.53
-1.66
-1.84
-2.00
LOG
MAG
Max
www.vishay.com
S22
-12.3
-15.1
-17.4
-19.7
-22.0
-24.3
-26.2
-28.4
-30.5
-32.7
-12.6
-15.3
-17.8
-20.0
-22.4
-24.6
-26.6
-28.8
-31.0
-33.3
-10.0
-12.9
-15.7
-18.0
-20.4
-22.7
-25.0
-27.1
-29.4
-31.6
-33.9
ANG
Unit
deg
-3.6
-7.0
-9.7
-3.5
-7.2
-9.8
-3.6
-7.3
dB
dB
dB
dB
dB
3