BF998_15 datasheet(4/12 Pages) JMNIC

Part #	BF998

Description	Silicon N-channel dual-gate

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Manufacturer	JMNIC [Quanzhou Jinmei Electronic Co.,Ltd.]

Direct Link	http://www.jmnic.com

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4 / 12 page

1996 Aug 01

4

Philips Semiconductors

Product speciﬁcation

Silicon N-channel dual-gate MOS-FETs

BF998; BF998R

THERMAL CHARACTERISTICS

Notes

1. Device mounted on a ceramic substrate, 8 mm

× 10 mm × 0.7 mm.

2. Device mounted on a printed-circuit board.

STATIC CHARACTERISTICS

Tj =25 °C; unless otherwise speciﬁed.

Note

1. Measured under pulse condition.

DYNAMIC CHARACTERISTICS

Common source; Tamb =25 °C; VDS =8V; VG2-S = 4 V; ID = 10 mA.

SYMBOL

PARAMETER

CONDITIONS

VALUE

UNIT

Rth j-a

thermal resistance from junction to ambient in free air; BF998

note 1

460

K/W

note 2

500

K/W

Rth j-a

thermal resistance from junction to ambient in free air; BF998R note 1

500

K/W

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

±V

(BR)G1-SS

gate 1-source breakdown voltage

VG2-S =VDS = 0; IG1-SS = ±10 mA

6

20

V

±V(BR)G2-SS gate 2-source breakdown voltage

VG1-S =VDS = 0; IG2-SS = ±10 mA

6

20

V

−V(P)G1-S

gate 1-source cut-off voltage

VG2-S =4V; VDS =8V; ID =20 µA

−

2.0

V

−V(P)G2-S

gate 2-source cut-off voltage

VG1-S = 0; VDS =8V; ID =20 µA

−

1.5

V

IDSS

drain-source current

VG2-S =4V; VDS =8V; VG1-S = 0; note 1

2

18

mA

±IG1-SS

gate 1 cut-off current

VG2-S =VDS = 0; VG1-S = ±5V

−

50

nA

±IG2-SS

gate 2 cut-off current

VG1-S =VDS = 0; VG2-S = ±5V

−

50

nA

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

y

fs

forward transfer admittance

f = 1 kHz

21

24

−

mS

Cig1-s

input capacitance at gate 1

f = 1 MHz

−

2.1

2.5

pF

Cig2-s

input capacitance at gate 2

f = 1 MHz

−

1.2

−

pF

Cos

output capacitance

f = 1 MHz

−

1.05

−

pF

Crs

reverse transfer capacitance

f = 1 MHz

−

25

−

fF

F

noise ﬁgure

f = 200 MHz; GS = 2 mS; BS =BSopt

−

0.6

−

dB

f = 800 MHz; GS = 3.3 mS; BS =BSopt

−

1.0

−

dB

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BF998 Datasheet(PDF) 4 Page - Quanzhou Jinmei Electronic Co.,Ltd.

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