BFQ540 datasheet(5/8 Pages) PHILIPS

Part #	BFQ540

Description	NPN wideband dual transistor

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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NXP Semiconductors

Product speciﬁcation

NPN wideband transistor

BFQ540

Fig.4

Feedback capacitance as a function of

collector-base voltage; typical values.

IC = 0; f = 1 MHz.

handbook, halfpage

MRA688

1.0

0.8

0.6

0.4

0.2

0

04

8

12

Cre

(pF)

VCB (V)

Fig.5

Transition frequency as a function of

collector current; typical values.

f = 1 GHz; Tamb =25 °C.

handbook, halfpage

MRA689

fT

(GHz)

IC (mA)

12

8

4

0

10−1

110

102

VCE = 8V

VCE = 4V

Fig.6

Intermodulation distortion as a function of

collector current; typical values.

VCE = 8 V; Vo = 475 mV; RL =50 Ω.

fp +fq − fr = 793.25 MHz; Tamb =25 °C.

handbook, halfpage

10

60

20

70

60

MBG242

50

40

30

20

30

40

50

dim

(dB)

IC (mA)

Fig.7

Second order intermodulation distortion as

a function of collector current; typical

values.

VCE = 8 V; Vo = 225 mV; RL =50 Ω; fp +fq = 810 MHz;

Tamb =25 °C.

handbook, halfpage

10

60

MBG243

20

30

40

50

20

70

60

50

40

30

d2

(dB)

IC (mA)

Rev. 04 - 25 September 2007

5 of 8

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