BF998A Vishay Telefunken, BF998A Datasheet

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BF998A

Manufacturer Part Number
BF998A
Description
N-Channel Dual Gate MOS-Fieldeffect Tetrode/ Depletion Mode
Manufacturer
Vishay Telefunken
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
BF998A-GS08
Manufacturer:
VISHAY/威世
Quantity:
20 000
N–Channel Dual Gate MOS-Fieldeffect Tetrode,
Depletion Mode
Applications
Input and mixer stages in UHF tuners.
Features
BF998 Marking: MO
Plastic case (SOT 143)
1 = Source, 2 = Drain, 3 = Gate 2, 4 = Gate 1
BF998RW Marking: WMO
Plastic case (SOT 343R)
1 = Source, 2 = Drain, 3 = Gate 2, 4 = Gate 1
Document Number 85011
Rev. 4, 23-Jun-99
D
D
D
D
2
3
4
Integrated gate protection diodes
Low noise figure
Low feedback capacitance
High cross modulation performance
1
94 9279
2
3
1
4
13 654
13 579
13 566
BF998R Marking: MOR
Plastic case (SOT 143R)
1 = Source, 2 = Drain, 3 = Gate 2, 4 = Gate 1
D
D
D
Electrostatic sensitive device.
Observe precautions for handling.
4
BF998/BF998R/BF998RW
Low input capacitance
High AGC-range
High gain
1
94 9278
2
3
www.vishay.de FaxBack +1-408-970-5600
Vishay Telefunken
95 10831
1 (9)

Related parts for BF998A

BF998A Summary of contents

Page 1

... Rev. 4, 23-Jun-99 BF998/BF998R/BF998RW Electrostatic sensitive device. Observe precautions for handling. D Low input capacitance D High AGC-range D High gain 579 94 9278 4 3 BF998R Marking: MOR Plastic case (SOT 143R Source Drain Gate Gate 1 13 566 www.vishay.de FaxBack +1-408-970-5600 Vishay Telefunken 95 10831 1 (9) ...

Page 2

... Gate 2 - source G1S m cut-off voltage www.vishay.de FaxBack +1-408-970-5600 2 (9) Test Conditions 60 ° amb Test Conditions 3 Type = BF998/BF998R/ BF998RW BF998A/BF998RA/ BF998RAW BF998B/BF998RB/ BF998RBW = 4 V, – –V Symbol Value Unit G1/G2SM ...

Page 3

... C issg1 = G2S issg2 C rss C oss = 0.5 mS 200 MHz mS 800 MHz 0.5 mS 200 MHz mS 800 MHz F L www.vishay.de FaxBack +1-408-970-5600 Vishay Telefunken Min Typ Max Unit 2.1 2 ...

Page 4

... BF998/BF998R/BF998RW Vishay Telefunken Typical Characteristics (T 300 250 200 150 100 100 120 140 160 T – Ambient Temperature ( 12159 amb Figure 1. Total Power Dissipation vs. Ambient Temperature G2S – Drain Source Voltage ( V ) ...

Page 5

... Figure 10. Short Circuit Forward Transfer Admittance 9 =4V G2S 100MHz 0.25 12822 Figure 11. Short Circuit Output Admittance = Vishay Telefunken V =8V f=100MHz DS =4V G2S I =5mA D 10mA 400MHz 700MHz 1000MHz 1300MHz f=1300MHz ...

Page 6

... BF998/BF998R/BF998RW Vishay Telefunken mA G2S j0.5 j0.2 0 0.2 0 –j0.2 1300MHz 1000 –j0.5 12 960 –j Figure 12. Input reflection coefficient 120 700 1000 400 150 1300MHz 100 180 1 –150 –120 –90 12 962 Figure 13. Forward transmission coefficient www.vishay.de FaxBack +1-408-970-5600 ...

Page 7

... Dimensions of BF998 in mm Dimensions of BF998R in mm Document Number 85011 Rev. 4, 23-Jun-99 BF998/BF998R/BF998RW Vishay Telefunken 96 12240 96 12239 www.vishay.de FaxBack +1-408-970-5600 7 (9) ...

Page 8

... BF998/BF998R/BF998RW Vishay Telefunken Dimensions of BF998RW in mm www.vishay.de FaxBack +1-408-970-5600 8 (9) 96 12238 Document Number 85011 Rev. 4, 23-Jun-99 ...

Page 9

... Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Telephone 7131 67 2831, Fax number 7131 67 2423 Document Number 85011 Rev. 4, 23-Jun-99 BF998/BF998R/BF998RW Vishay Telefunken www.vishay.de FaxBack +1-408-970-5600 9 (9) ...

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