BF998A-GS08 [VISHAY]
N-Channel Dual Gate MOS-Fieldeffect Tetrode, Depletion Mode; N沟道双栅MOS -场效应四极管，耗尽型
| 型号： | BF998A-GS08 |
| 厂家： | 
VISHAY |
| 描述： | N-Channel Dual Gate MOS-Fieldeffect Tetrode, Depletion Mode |
| 文件： | 总10页 (文件大小：319K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Not for new design, this product will be obsoleted soon
BF998/BF998R/BF998RW
Vishay Semiconductors
N-Channel Dual Gate MOS-Fieldeffect Tetrode, Depletion Mode
2
1
Features
SOT143
• Integrated gate protection diodes
• Low noise figure
3
4
e3
• Low feedback capacitance
• High cross modulation performance
• Low input capacitance
• High AGC-range
2
1
SOT143R
SOT343R
• High gain
4
3
2
• Lead (Pb)-free component
• Component in accordance to RoHS 2002/95/EC
and WEEE 2002/96/EC
1
4
3
19216
Applications
• Input and mixer stages in UHF tuners
Electrostatic sensitive device.
Observe precautions for handling.
Mechanical Data
Typ: BF998
Pinning:
Case: SOT143 Plastic case
Weight: approx. 8.0 mg
Marking: MO
1 = Source, 2 = Drain,
3 = Gate 2, 4 = Gate 1
Typ: BF998RW
Pinning:
Case: SOT343R Plastic case
Weight: approx. 6.0 mg
Marking: WMO
1 = Source, 2 = Drain,
3 = Gate 2, 4 = Gate 1
Typ: BF998R
Pinning:
Case: SOT143R Plastic case
Weight: approx. 8.0 mg
Marking: MOR
1 = Source, 2 = Drain,
3 = Gate 2, 4 = Gate 1
Parts Table
Part
Ordering code
BF998A-GS08
BF998A-GS08
BF998RA-GS08
BF998RA-GS08
Type Marking
MO
Remarks
BF998
SOT143
SOT143
BF998A
BF998R
BF998RA
MO
MOR
SOT143R
SOT143R
MOR
BF998RAW-GS08 or
BF998RBW-GS08
BF998RW
WMO
SOT343R
BF998RAW-GS08
BF998RBW-GS08
WMO
WMO
SOT343R
SOT343R
BF998RAW
BF998RBW
Document Number 85011
Rev. 1.8, 05-Sep-08
www.vishay.com
1
BF998/BF998R/BF998RW
Vishay Semiconductors
Absolute Maximum Ratings
T
= 25 °C, unless otherwise specified
amb
Parameter
Test condition
Symbol
VDS
Value
12
Unit
V
Drain - source voltage
Drain current
ID
30
mA
Gate 1/Gate 2 - source peak
current
IG1/G2SM
10
mA
Gate 1/Gate 2 - source voltage
Total power dissipation
VG1S/G2S
Ptot
7
200
V
mW
°C
Tamb ≤ 60 °C
Channel temperature
TCh
150
Storage temperature range
Tstg
- 65 to + 150
°C
Thermal Characteristics
Parameter
Test condition
Symbol
RthChA
Value
450
Unit
K/W
1)
Channel ambient
1) on glass fibre printed board (25 x 20 x 1.5) mm3 plated with 35 µm Cu
Electrical DC Characteristics
T
= 25 °C, unless otherwise specified
amb
Parameter
Test condition
Part
Symbol
V(BR)DS
Min.
12
Typ.
Max.
Unit
V
Drain - source breakdown
voltage
ID = 10 μA, - VG1S = - VG2S = 4 V
Gate 1 - source breakdown
voltage
I
I
G1S = 10 mA, VG2S = VDS = 0
G2S = 10 mA, VG1S = VDS = 0
V(BR)G1SS
V(BR)G2SS
7
7
14
14
V
V
Gate 2 - source breakdown
voltage
V
G1S = 5 V, VG2S = VDS = 0
G2S = 5 V, VG1S = VDS = 0
IG1SS
IG2SS
Gate 1 - source leakage current
Gate 2 - source leakage current
50
50
nA
nA
V
BF998/
BF998R/
BF998RW
IDSS
4
18
mA
mA
V
DS = 8 V, VG1S = 0, VG2S = 4 V
BF998A/
BF998RA/
BF998RAW
Drain current
IDSS
4
10.5
IDSS
BF998RBW
9.5
18
2.0
1.0
mA
V
VDS = 8 V, VG2S = 4 V, ID = 20 μA
VDS = 8 V, VG1S = 0, ID = 20 μA
- VG1S(OFF)
- VG2S(OFF)
Gate 1 - source cut-off voltage
Gate 2 - source cut-off voltage
1.0
0.6
V
Electrical AC Characteristics
T
= 25 °C, unless otherwise specified
amb
VDS = 8 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz
Parameter
Forward transadmittance
Gate 1 input capacitance
Gate 2 input capacitance
Feedback capacitance
Output capacitance
Test condition
Symbol
|y21s
Min.
21
Typ.
24
Max.
Unit
|
mS
pF
pF
fF
Cissg1
Cissg2
Crss
2.1
1.1
25
2.5
VG1S = 0, VG2S = 4 V
Coss
1.05
pF
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2
Document Number 85011
Rev. 1.8, 05-Sep-08
BF998/BF998R/BF998RW
Vishay Semiconductors
Parameter
Test condition
S = 2 mS, GL = 0.5 mS,
f = 200 MHz
Symbol
Gps
Min.
Typ.
28
Max.
Unit
dB
G
G
Power gain
AGC range
S = 3,3 mS, GL = 1 mS,
f = 800 MHz
Gps
ΔGps
F
16.5
40
20
dB
dB
dB
VG2S = 4 to -2 V, f = 800 MHz
GS = 2 mS, GL = 0.5 mS,
f = 200 MHz
1.0
1.5
Noise figure
GS = 3,3 mS, GL = 1 mS,
F
dB
f = 800 MHz
Common Source S-Parameters
T
= 25 °C, unless otherwise specified
amb
VDS = 8 V, VG2S = 4 V, Z0 = 50 Ω
ID/mA
f/MHz
S11
S21
S12
S22
LOG
MAG
ANG
deg
LOG
MAG
ANG
deg
LOG
MAG
ANG
deg
LOG
MAG
ANG
deg
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
100
200
300
400
500
600
700
800
900
- 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
- 7.2
5.71
5.51
5.20
2.01
1.45
0.94
0.43
- 0.10
- 0.59
- 1.12
- 1.52
- 1.93
- 2.35
5.19
5.58
4.45
3.95
3.40
2.88
2.39
1.88
1.39
0.90
0.50
0.13
- 0.28
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
168.8
157.3
134.7
121.3
108.4
96.5
85.0
74.1
63.6
53.1
43.7
33.6
24.1
165.3
151.8
136.3
123.3
110.9
99.5
88.7
78.1
67.9
57.9
48.7
38.9
29.6
165.4
152.0
136.7
123.8
111.5
100.3
89.6
79.4
69.2
59.4
50.2
- 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
83.6
76.8
67.7
62.8
57.8
57.3
58.9
63.3
73.1
83.5
102.1
120.4
131.7
81.9
75.0
67.2
61.8
56.3
55.8
56.7
60.7
69.9
80.0
98.9
118.2
130.5
81.4
74.6
66.4
60.8
55.1
54.4
54.9
58.5
67.3
76.7
95.2
115.3
128.7
- 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
- 3.6
- 7.0
- 9.7
- 14.1
- 20.9
- 32.1
- 39.2
- 45.8
- 52.3
- 58.7
- 64.7
- 70.7
- 76.6
- 82.5
- 88.6
- 9.0
- 18.7
- 26.0
- 33.7
- 41.2
- 48.3
- 55.1
- 61.6
- 67.9
- 74.2
- 80.2
- 86.4
- 92.3
- 9.4
- 19.4
- 27.1
- 35.0
- 42.9
- 50.3
- 57.2
- 63.9
- 70.4
- 76.8
- 82.9
- 89.0
- 95.1
- 12.3
- 15.1
- 17.4
- 19.7
- 22.0
- 24.3
- 26.2
- 28.4
- 30.5
- 32.7
- 3.5
5
- 7.2
- 9.8
- 12.6
- 15.3
- 17.8
- 20.0
- 22.4
- 24.6
- 26.6
- 28.8
- 31.0
- 33.3
- 3.6
10
- 7.3
- 10.0
- 12.9
- 15.7
- 18.0
- 20.4
- 22.7
- 25.0
- 27.1
- 29.4
- 31.6
- 33.9
15
1000
1100
1200
1300
40.8
31.5
Document Number 85011
Rev. 1.8, 05-Sep-08
www.vishay.com
3
BF998/BF998R/BF998RW
Vishay Semiconductors
Typical Characteristics
T
= 25 °C, unless otherwise specified
amb
300
250
200
150
100
50
4 V
3 V
2 V
20
16
12
8
5 V
VDS = 8 V
1 V
0
4
VG1S = - 1 V
0
0
0
20 40 60 80 100 120 140 160
- Ambient Temperature (°C)
- 0.6
- 0.2
0.2
0.6
1.0
1.4
T
amb
12817
96 12159
V
G2S - Gate 2 Source Voltage (V)
Figure 1. Total Power Dissipation vs. Ambient Temperature
Figure 4. Drain Current vs. Gate 2 Source Voltage
30
3.0
V
= 4V
V
= 8 V
= 4 V
G2S
DS
V
= 0.6 V
0.4 V
25
20
15
10
5
2.5
2.0
1.5
1.0
0.5
0.0
G1S
V
G2S
f = 1 MHz
0.2 V
0
- 0.2 V
- 0.4 V
0
- 2 - 1.5 - 1 - 0.5
0
0.5 1.0 1.5
0
2
4
6
8
10
12812
12863
V
DS - Drain Source Voltage (V)
VG1S - Gate 1 Source Voltage (V)
Figure 2. Drain Current vs. Drain Source Voltage
Figure 5. Gate 1 Input Capacitance vs. Gate 1 Source Voltage
3.0
20
3 V
2 V
VDS = 8 V
6 V
5 V
4 V
VG2S = 4 V
f = 1 MHz
2.5
16
12
8
1 V
2.0
1.5
1.0
0.5
0.0
0
4
VG2S = - 1 V
0.8
0
- 0.8
- 0.4
0.0
0.4
1.2
2
4
6
8
10
12
12816
12864
VDS - Drain Source Voltage (V)
VG1S - Gate 1 Source Voltage (V)
Figure 3. Drain Current vs. Gate 1 Source Voltage
Figure 6. Output Capacitance vs. Drain Source Voltage
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4
Document Number 85011
Rev. 1.8, 05-Sep-08
BF998/BF998R/BF998RW
Vishay Semiconductors
10
0
5
4 V
3 V
V
= 8 V
= 4 V
f = 800 MHz
DS
f = 100 MHz
0
- 5
V
G2S
2 V
f = 100...1300 MHz
1 V
- 10
- 20
- 30
- 40
- 50
- 10
- 15
- 20
- 25
- 30
- 35
- 40
I
= 5 mA
D
0
10 mA
400 MHz
700 MHz
- 0.2 V
20 mA
- 0.4 V
1000 MHz
VG2S = - 0.8 V
1300 MHz
- 1.0
- 0.5
0.0
0.5
1.0
1.5
0
4
8
12 16 20 24 28 32
VG1S - Gate 1 Source Voltage (V)
12821
Re (y21) (mS)
12818
Figure 7. Transducer Gain vs. Gate 1 Source Voltage
Figure 10. Short Circuit Forward Transfer Admittance
9
32
VDS = 8 V
f = 1 MHz
VG2S = 4 V
3 V
f = 1300 MHz
8
7
6
5
4
3
2
1
0
28
24
20
16
12
8
1000 MHz
700 MHz
2 V
V
V
= 15 V
400 MHz
DS
= 4 V
G2S
I
=10 mA
1 V
D
4
100 MHz
f = 100...1300 MHz
0
0
0
4
8
12
16
20
24
28
0.00 0.25 0.50 0.75 1.00 1.25 1.50
12819
12822
Re (y22) (mS)
ID - Drain Current (mA)
Figure 8. Forward Transadmittance vs. Drain Current
Figure 11. Short Circuit Output Admittance
20
f = 1300 MHz
18
16
14
1000 MHz
12
10
700 MHz
8
V
= 8 V
= 4 V
= 10 mA
DS
6
4
2
0
400 MHz
V
G2S
I
D
f = 100...1300 MHz
100 MHz
0
2
4
6
8
10 12 14
12820
Re (y11) (mS)
Figure 9. Short Circuit Input Admittance
Document Number 85011
Rev. 1.8, 05-Sep-08
www.vishay.com
5
BF998/BF998R/BF998RW
Vishay Semiconductors
V
S
= 8 V, I = 10 mA, V
= 4 V, Z = 50 Ω
DS
11
D
G2S
0
S
21
j
90°
700
120 °
400
60°
j0.5
j2
1000
150 °
100
30°
j0.2
j5
1300 MHz
0
0.2
0.5
1
2
5
180°
1
2
0°
100
- j5
- j0.2
1300 MHz
1000
- 150°
- 30°
- j0.5
- j2
- 120°
- 60°
- j
- 90°
12962
12960
Figure 12. Input Reflection Coefficient
Figure 14. Forward Transmission Coefficient
S
S
22
12
j
90°
120°
60°
j0.5
j2
5
150°
1300 MHz
30°
0.16 0 °
- 30°
j0.2
0
j5
1200
200
100
180°
0.08
0.2
0.5
1
2
100
- j0.2
- j5
- 150°
1300 MHz
- j0.5
- j2
- 120°
- 60°
12963
- j
- 90°
12973
Figure 13. Reverse Transmission Coefficient
Figure 15. Output Reflection Coefficient
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6
Document Number 85011
Rev. 1.8, 05-Sep-08
BF998/BF998R/BF998RW
Vishay Semiconductors
Package Dimensions in millimeters (inches): SOT143
3 [0.118]
2.8 [0.110]
0.5 [0.020]
0.5 [0.020]
0.35 [0.014]
2.6 [0.102]
0.35 [0.014]
2.35 [0.093]
1.8 [0.071]
1.6 [0.063]
0.5 [0.020]
0.9 [0.035]
0.75 [0.030]
0.35 [0.014]
foot print recommendation:
1.7 [0.067]
1.2 [0.047]
0.8 [0.031]
2 [0.079]
1.8 [0.071]
0.8 [0.031]
0.8 [0.031]
96 12240
1.9 [0.075]
Package Dimensions in millimeters (inches): SOT143R
96 12239
Document Number 85011
Rev. 1.8, 05-Sep-08
www.vishay.com
7
BF998/BF998R/BF998RW
Vishay Semiconductors
Package Dimensions in millimeters (inches): SOT343R
96 12238
www.vishay.com
8
Document Number 85011
Rev. 1.8, 05-Sep-08
BF998/BF998R/BF998RW
Vishay Semiconductors
Ozone Depleting Substances Policy Statement
It is the policy of Vishay Semiconductor GmbH to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and operating
systems with respect to their impact on the health and safety of our employees and the public, as well as
their impact on the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are
known as ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs
and forbid their use within the next ten years. Various national and international initiatives are pressing for an
earlier ban on these substances.
Vishay Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use
of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments
respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Vishay Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design
and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each
customer application by the customer. Should the buyer use Vishay Semiconductors products for any
unintended or unauthorized application, the buyer shall indemnify Vishay Semiconductors against all
claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal
damage, injury or death associated with such unintended or unauthorized use.
Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Document Number 85011
Rev. 1.8, 05-Sep-08
www.vishay.com
9
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
www.vishay.com
1
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