VISHAY BF988 Technical data

查询BF988供应商

N–Channel Dual Gate MOS-Fieldeffect Tetrode,
Depletion Mode

Electrostatic sensitive device.
Observe precautions for handling.

Applications

Input- and mixer stages especially VHF- and UHF- tuners.

Features

D

Integrated gate protection diodes

D

High cross modulation performance

D

Low noise figure

D

High gain

D

High AGC-range

D

Low feedback capacitance

D

Low input capacitance

BF988

Vishay Telefunken

2

94 9307

3

4

96 12647

1

G

2

G

1

BF988 Marking: BF988
Plastic case (TO 50)

12623

1 = Drain, 2 = Source, 3 = Gate 1, 4 = Gate 2

Absolute Maximum Ratings

T

= 25_C, unless otherwise specified

amb

Parameter Test Conditions Type Symbol Value Unit
Drain - source voltage V
Drain current I
Gate 1/Gate 2 - source peak current ±I
Total power dissipation T
Channel temperature T
Storage temperature range T

≤ 60 °C P

amb

DS

D

G1/G2SM

tot
Ch
stg

D

12 V
30 mA

10 mA
200 mW
150

–55 to +150

S

°

C

°

C

Maximum Thermal Resistance

T

= 25_C, unless otherwise specified

amb

Parameter Test Conditions Symbol Value Unit

Channel ambient on glass fibre printed board (40 x 25 x 1.5) mm

plated with 35mm Cu

Document Number 85007
Rev. 4, 08-Jul-99

3

R

thChA

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450 K/W

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BF988

DS G1S

Vishay Telefunken

Electrical DC Characteristics

T

= 25_C, unless otherwise specified

amb

Parameter Test Conditions Type Symbol Min Typ Max Unit

Drain - source
breakdown voltage

Gate 1 - source
breakdown voltage

Gate 2 - source
breakdown voltage

Gate 1 - source
leakage current

Gate 2 - source
leakage current

Drain current VDS = 15 V, V

Gate 1 - source
cut-off voltage

Gate 2 - source
cut-off voltage

ID = 10 mA,
–V

= –V

±I
V

±I
V

±V
V

±V
V

V

G1S

G1S

G2S

G2S

G1S

G1S

G2S

G2S

G1S

G2S

G2S

= 10 mA,

= VDS = 0

= 10 mA,

= VDS = 0

= 5 V,

= VDS = 0

= 5 V,

= VDS = 0

= 4 V

VDS = 15 V, V
ID = 20 mA

VDS = 15 V, V
ID = 20 mA

= 4 V

= 0, BF988 I

G1S

BF988A I
BF988B I

= 4 V,

G2S

= 0,

G1S

V

(BR)DS

±V

(BR)G1SS

±V

(BR)G2SS

±I

±I

–V

G1S(OFF)

–V

G2S(OFF)

G1SS

G2SS

DSS
DSS
DSS

12 V

7 14 V

7 14 V

4 18 mA
4 10.5 mA

9.5 18 mA

50 nA

50 nA

2.5 V

2.0 V

Electrical AC Characteristics

VDS = 8 V, ID = 10 mA, V

Parameter Test Conditions Type Symbol Min Typ Max Unit
Forward transadmittance y
Gate 1 input capacitance C
Gate 2 input capacitance V
Feedback capacitance C
Output capacitance C
Power gain GS = 2 mS, GL = 0.5 mS,

AGC range V

Noise figure GS = 2 mS, GL = 0.5 mS,

= 4 V, f = 1 MHz , T

G2S

G1S

= 0, V

= 4 V C

G2S

f = 200 MHz
GS = 3,3 mS, GL = 1 mS,

f = 800 MHz

= 4 to –2 V,

G2S

f = 800 MHz

f = 200 MHz
GS = 3,3 mS, GL = 1 mS,

f = 800 MHz

= 25_C, unless otherwise specified

amb

 21 24 mS

21s

2.1 2.5 pF

1.2 pF
25 fF

1.05 pF
28 dB

40 dB

G

G

D

issg1
issg2

rss

oss

ps

ps

G

ps

16.5 20 dB

F 1 dB

F 1.5 dB

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Document Number 85007

Rev. 4, 08-Jul-99

Common Source S–Parameters

BF988

Vishay Telefunken

VDS , = 8 V , V

ID/mA f/MHz

5 700 –1.59 –50.9 4.54 100.4 –47.31 58.6 –0.43 –23.8

10 700 –1.76 –53.2 6.27 101.9 –46.51 57.4 –0.48 –24.1

15 700 –1.85 –54.1 6.98 102.6 –45.72 57.0 –0.53 –24.2

= 4 V , Z0 = 50 W,T

G2S

S11 S21 S12 S22

LOG

MAG

dB deg dB deg dB deg dB deg
100 –0.02 –7.8 6.01 168.4 –56.27 83.0 –0.02 –3.6
200 –0.10 –15.3 5.87 156.3 –50.61 76.6 –0.06 –7.3
300 –0.31 –22.8 5.69 144.2 –47.70 70.9 –0.13 –10.6
400 –0.56 –30.2 5.42 132.9 –46.19 65.6 –0.20 –14.2
500 –0.87 –37.3 5.17 121.5 –45.46 60.6 –0.28 –17.5
600 –1.26 –44.3 4.85 110.6 –45.84 55.4 –0.36 20.5

800 –2.04 –58.0 4.25 90.2 –48.19 63.3 –0.49 –26.8
900 –2.42 –64.4 4.02 80.6 –50.37 81.5 –0.52 –30.2

1000 –2.88 –71.4 3.78 70.8 –49.48 115.6 –0.54 –33.4

1100 –3.39 –78.3 3.42 60.5 47.92 131.7 –0.66 –36.8
1200 –3.94 –85.2 3.21 51.6 –44.65 153.0 –0.66 –40.1
1300 –4.46 –91.8 3.01 42.0 –41.76 159.8 –0.66 –43.9

100 –0.02 –8.3 7.84 168.5 –55.67 83.0 –0.04 –3.7
200 –0.11 –16.1 7.70 156.6 –50.01 76.4 –0.09 –7.4
300 –0.35 –24.0 7.49 144.8 –47.20 70.3 –0.16 –10.8
400 –0.62 –31.6 7.21 133.6 –45.60 65.1 –0.23 –14.3
500 –0.97 –39.2 6.93 122.5 –44.88 60.0 –0.31 17.9
600 –1.39 –46.4 6.59 111.9 –45.25 54.5 –0.42 –20.9

800 –2.25 –60.3 5.97 92.1 –47.19 61.4 –0.55 –27.3
900 –2.67 –67.1 5.71 82.8 –49.28 76.0 –0.58 –30.6

1000 –3.16 –74.1 5.46 73.3 –48.99 107.1 –0.60 –33.8

1100 –3.72 –81.1 5.07 63.3 –48.03 123.3 –0.73 –37.2
1200 –4.30 –88.0 4.85 54.6 –45.15 147.6 –0.73 –40.6
1300 –4.87 –94.4 4.63 45.4 –42.46 157.0 –0.73 –44.3

100 –0.01 –8.4 8.62 168.6 –55.26 83.0 –0.07 –3.7
200 –0.13 –16.4 8.46 156.8 –49.61 76.3 –0.12 –7.5

3000 –0.37 –24.5 8.26 145.2 –46.70 70.3 –0.20 –11.0

400 –0.66 –32.3 7.96 134.0 –45.10 64.9 –0.27 –14.4
500 –1.02 –39.8 7.66 122.9 –44.38 59.7 –0.36 –18.0
600 –1.47 –47.0 7.33 112.3 –44.65 54.3 –0.47 –20.9

800 –2.36 –61.3 6.68 92.8 –46.29 60.0 –0.61 –27.4
900 –2.80 –67.9 6.42 83.7 –48.18 71.9 –0.64 –30.6

1000 –3.30 –75.0 6.15 74.3 –48.49 98.7 –0.66 –33.9

1100 3.89 –82.0 5.75 64.6 –47.93 114.8 ––0.77 –37.3
1200 –4.49 –88.8 5.52 56.0 –45.75 141.2 –0.79 –40.8
1300 –5.06 –95.2 5.30 46.9 –43.05 153.4 –0.79 –44.5

= 25_C, unless otherwise specified

amb

ANG LOG

MAG

ANG LOG

MAG

ANG LOG

MAG

ANG

Document Number 85007
Rev. 4, 08-Jul-99

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