Vishay Telefunken BFQ81 Datasheet
Silicon NPN Planar RF Transistor
Electrostatic sensitive device.
Observe precautions for handling.
Applications
RF amplifier up to 2 GHz, especially for mobile telephone.
Features
D
Small feedback capacitance
D
Low noise figure
D
Low cross modulation
1
BFQ81
Vishay Telefunken
94 9280
13 581–2
23
BFQ81 Marking: RA
Plastic case (SOT 23)
1 = Collector, 2 = Base, 3 = Emitter
Absolute Maximum Ratings
T
= 25_C, unless otherwise specified
amb
Parameter Test Conditions Symbol Value Unit
Collector-base voltage V
Collector-emitter voltage V
Emitter-base voltage V
Collector current I
Total power dissipation T
Junction temperature T
Storage temperature range T
≤ 60 °C P
amb
CBO
CEO
EBO
C
tot
j
stg
25 V
16 V
2 V
30 mA
200 mW
150
–65 to +150
Maximum Thermal Resistance
T
= 25_C, unless otherwise specified
amb
Parameter T est Conditions Symbol Value Unit
Junction ambient on glass fibre printed board (25 x 20 x 1.5) mm
plated with 35mm Cu
3
R
thJA
450 K/W
°
C
°
C
Document Number 85023
Rev. 3, 20-Jan-99
www.vishay.de • FaxBack +1-408-970-5600
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BFQ81
qy
Vishay Telefunken
Electrical DC Characteristics
T
= 25_C, unless otherwise specified
amb
Parameter Test Conditions Symbol Min Typ Max Unit
Collector cut-off current VCE = 25 V, VBE = 0 I
Collector-base cut-off current VCB = 20 V, IE = 0 I
Emitter-base cut-off current VEB = 2 V, IC = 0 I
Collector-emitter breakdown voltage IC = 1 mA, IB = 0 V
Collector-emitter saturation voltage IC = 30 mA, IB = 3 mA V
DC forward current transfer ratio VCE = 10 V, IC = 5 mA h
VCE = 10 V, IC = 15 mA h
Electrical AC Characteristics
T
= 25_C, unless otherwise specified
amb
Parameter Test Conditions Symbol Min Typ Max Unit
Transition frequency VCE = 10 V, IC = 5 mA, f = 500 MHz f
VCE = 10 V, IC = 15 mA, f = 500 MHz f
Collector-base capacitance VCB = 10 V, f = 1 MHz C
Collector-emitter capacitance VCE = 10 V, f = 1 MHz C
Emitter-base capacitance VEB = 0.5 V, f = 1 MHz C
Noise figure VCE = 10 V, IC = 5 mA, ZS = 50 W,
f = 800 MHz
VCE = 10 V, IC = 5 mA, ZS = Z
Sopt
,
f = 2 GHz
Power gain VCE = 10 V, IC = 5 mA, ZS = 50 W,
Linear output voltage – two
tone intermodulation test
ZL = Z
VCE = 10 V, IC = 25 mA, dIM = 60 dB,
f1 = 806 MHz, f2 = 810 MHz,
ZS = ZL = 50
, f = 800 MHz
Lopt
W
Third order intercept point VCE = 10 V, IC = 25 mA, f = 800 MHz IP
F 1.4 dB
F 2.5 dB
G
V1 = V
CES
CBO
EBO
(BR)CEO
CEsat
FE
FE
T
T
cb
ce
eb
pe
2
3
100mA
100 nA
10
m
16 V
0.2 0.5 V
70 100 150
70 100
4.2 GHz
5.8 GHz
0.35 pF
0.2 pF
1.1 pF
15 dB
160 mV
27 dBm
A
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Document Number 85023
Rev. 3, 20-Jan-99
Common Emitter S–Parameters
3
BFQ81
Vishay Telefunken
Z0 = 50 W,T
VCE/V IC/mA f/MHz
1 2 1500 0.480 173.1 1.64 60.8 0.168 46.6 0.399 –45.0
= 25_C, unless otherwise specified
amb
S11 S21 S12 S22
LIN
MAG
100 0.868 –29.7 6.78 157.2 0.045 72.3 0.939 –14.2
300 0.681 –77.6 5.08 125.2 0.098 50.7 0.720 –30.3
500 0.565 –109.5 3.77 106.3 0.120 42.0 0.576 –35.3
800 0.491 –142.9 2.67 87.8 0.136 39.4 0.477 –37.3
1000 0.478 –157.7 2.25 79.1 0.144 40.4 0.447 –38.7
1200 0.472 –171.0 1.94 71.1 0.152 42.6 0.424 –40.8
1800 0.491 159.5 1.42 51.7 0.189 50.6 0.381 –50.4
2000 0.506 151.7 1.32 46.8 0.208 52.6 0.368 –54.5
2200 0.523 144.4 1.23 42.1 0.228 53.8 0.355 –59.0
2500 0.554 133.5 1.13 35.3 0.262 54.3 0.340 –67.3
2800 0.573 123.9 1.04 29.4 0.294 53.7 0.316 –76.1
3000 0.600 117.4 0.97 26.3 0.315 53.0 0.305 –81.9
100 0.882 –24.8 6.74 160.3 0.032 74.9 0.958 –10.0
300 0.709 –66.7 5.32 130.7 0.073 55.2 0.798 –22.2
500 0.577 –97.2 4.09 111.8 0.092 46.8 0.680 –26.0
800 0.477 –130.9 2.96 93.2 0.106 44.4 0.593 –27.9
1000 0.450 –147.3 2.50 84.6 0.113 46.0 0.569 –29.2
1200 0.432 –162.0 2.16 76.5 0.120 48.6 0.551 –30.9
2 1500 0.433 179.7 1.83 66.4 0.134 53.8 0.531 –34.4
1800 0.445 164.6 1.58 57.5 0.153 58.9 0.519 –38.5
2000 0.459 156.0 1.45 52.6 0.169 61.4 0.511 –41.8
2200 0.471 147.7 1.36 48.1 0.188 63.3 0.502 –45.2
2500 0.501 136.4 1.24 41.2 0.220 64.8 0.495 –51.5
2800 0.521 126.5 1.14 35.1 0.252 65.0 0.478 –58.3
3000 0.543 119.1 1.07 32.2 0.275 64.5 0.471 –63.1
100 0.741 –38.2 13.66 150.6 0.028 70.6 0.890 –17.2
300 0.497 –91.6 8.67 116.8 0.056 56.0 0.619 –28.6
500 0.386 –122.9 5.90 100.7 0.072 55.6 0.504 –27.5
800 0.332 –153.1 3.94 86.1 0.095 59.4 0.451 –25.3
1000 0.324 –166.2 3.26 79.4 0.112 61.5 0.439 –25.4
1200 0.323 –178.8 2.77 72.9 0.130 62.6 0.433 –26.6
5 1500 0.333 167.3 2.30 64.6 0.156 63.8 0.422 –29.7
1800 0.352 155.1 1.98 56.8 0.186 63.9 0.413 –33.7
2000 0.367 147.8 1.82 52.5 0.206 63.4 0.406 –36.6
2200 0.381 140.3 1.69 48.5 0.227 62.8 0.398 –39.8
2500 0.414 131.2 1.54 42.3 0.256 61.4 0.389 –45.7
2800 0.434 123.0 1.41 36.4 0.284 59.8 0.372 –52.0
3000 0.459 116.9 1.32 33.2 0.303 58.8 0.364 –56.7
ANG
deg deg deg deg
LIN
MAG
ANG
LIN
MAG
ANG
LIN
MAG
ANG
Document Number 85023
Rev. 3, 20-Jan-99
www.vishay.de • FaxBack +1-408-970-5600
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