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TetraFET
D2294UK
METAL GATE RF SILICON FET
MECHANICAL DATA
GOLD METALLISED MULTI-PURPOSE SILICON DMOS RF FET 15W - 12.5V - 500MHz SINGLE ENDED
FEATURES
* SIMPLIFIED AMPLIFIER DESIGN * SUITABLE FOR BROAD BAND APPLICATIONS * VERY LOW Crss * SIMPLE BIAS CIRCUITS * LOW NOISE * HIGH GAIN - 11 dB MINIMUM
SOT 171
PIN 1 PIN 3 PIN 5 SOURCE GATE SOURCE PIN 2 PIN 4 PIN 6 SOURCE DRAIN SOURCE
APPLICATIONS
* HF/VHF/UHF COMMUNICATIONS from 1 MHz to 1 GHz
ABSOLUTE MAXIMUM RATINGS (Tcase = 25C unless otherwise stated)
PD BVDSS BVGSS ID(sat) Tstg Tj Power Dissipation Drain - Source Breakdown Voltage Gate - Source Breakdown Voltage Drain Current * Storage Temperature Maximum Operating Junction Temperature 50W 40V 20V 12A -65 to 150C 200C
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612. E-mail: sales@semelab.co.uk Website http://www.semelab.co.uk
Prelim. 01/01
D2294UK
ELECTRICAL CHARACTERISTICS (Tcase = 25C unless otherwise stated) Parameter Test Conditions Min.
BVDSS IDSS IGSS gfs GPS Drain-Source Breakdown Voltage Zero Gate Voltage Drain Current Gate Leakage Current Forward Transconductance * Common Source Power Gain Drain Efficiency Input Capacitance Output Capacitance Reverse Transfer Capacitance VGS = 0 VDS = 12.5V VGS = 20V ID = 10mA VDS = 10V PO = 15W VDS = 12.5V f = 500MHz VDS = 0 VGS = -5V f = 1MHz f = 1MHz f = 1MHz VDS = 12.5V VGS = 0 VDS = 12.5V VGS = 0 IDQ = 0.6A ID = 10mA VGS = 0 VDS = 0 VDS = VGS ID = 0.6A 1 1.08 11 50 20:1 40
Typ.
Max. Unit
V 1 6 7 mA
mA
V S dB % --
VGS(th) Gate Threshold Voltage *
h
VSWR Load Mismatch Tolerance Ciss Coss Crss
72 60 6
pF pF pF
* Pulse Test:
Pulse Duration = 300 ms , Duty Cycle 2%
HAZARDOUS MATERIAL WARNING
The ceramic portion of the device between leads and metal flange is beryllium oxide. Beryllium oxide dust is highly toxic and care must be taken during handling and mounting to avoid damage to this area. THESE DEVICES MUST NEVER BE THROWN AWAY WITH GENERAL INDUSTRIAL OR DOMESTIC WASTE.
THERMAL DATA
RTHj-case Thermal Resistance Junction - Case Max.3.5C / W
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612. E-mail: sales@semelab.co.uk Website http://www.semelab.co.uk
Prelim. 01/01
D2294UK

3RXW :

*DLQ G%
3RXW :

'UDLQ(IILFLHQF\

I ,GT 9GV
3LQ:
0+] $ 9

3RXW *DLQ

I ,GT 9GV

3LQ:
0+] $ 9

3RXW 'UDLQ(IILFLHQF\

Figure 1 Output power and Gain vs. Input Power
Figure 2 Output power and Efficiency vs. Input Power
I 0+]9GV 9 ,'4 $ ,'4 $ ,'4 $ ,'4 $
OPTIMUM SOURCE AND LOAD IMPEDANCE
Frequency MHz 500 ZL
*DLQ G%

W
ZS
W
1.7 + j5.7
3.3+j1.1
3RXW:
Figure 3 Gain vs Output Power
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612. E-mail: sales@semelab.co.uk Website http://www.semelab.co.uk
Prelim. 01/01
D2294UK
Typical S Parameters
! Vds=12.5V, Idq=0.6A # MHZ S MA R 50 Freq MHz 70 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 S11 mag 0.73 0.74 0.76 0.78 0.8 0.82 0.84 0.86 0.88 0.89 0.9 0.92 0.93 0.94 0.94 0.95 0.95 0.96 0.95 0.95 ang -137 -146 -154 -159 -162 -165 -167 -169 -171 -173 -174 -175 -176 -178 -180 180 180 178 177 177 S21 mag 14.61 10.8 6.86 4.8 3.6 3 2.27 1.92 1.52 1.31 1.09 0.94 0.74 0.65 0.53 0.43 0.39 0.37 0.35 0.34 ang 92 83 69 60 52 47 38 34 27 24 19 12 12 7 8 8 14 15 19 17 S12 mag 0.02 0.02 0.019 0.017 0.015 0.014 0.012 0.01 0.008 0.006 0.006 0.006 0.006 0.007 0.007 0.008 0.009 0.011 0.013 0.014 ang 2 -3 -13 -18 -22 -22 -23 -23 -20 -8 7 17 33 39 49 54 65 69 72 71 S22 mag ang 0.67 0.69 0.73 0.76 0.79 0.82 0.84 0.86 0.88 0.89 0.91 0.92 0.93 0.94 0.94 0.95 0.95 0.96 0.95 0.96 -154 -159 -163 -165 -167 -168 -171 -172 -174 -175 -177 -178 -180 179 178 177 176 175 174 173
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612. E-mail: sales@semelab.co.uk Website http://www.semelab.co.uk
Prelim. 01/01
D2294UK
G a te -B ia s
0 .1 u F 1000pF 3 .3 K 3 .3 K T1 2 -1 8 p F D2294UK 15pF T2
1000pF
22 100uF
+ 1 2 .5 V
L2 0 .1 u F L1
T3 2 -1 8 p F
T4 1 -3 .5 p F
T5 30pF
30pF
500MHz Test Fixture
Substrate 1.6mm FR4 All microstrip lines W = 2.75mm T1 T2 T3 T4 T5 L1 L2 47mm 9mm 9mm 13mm 32mm 7 turns 24swg enamelled copper wire, 2mm i.d. 1.5 turns 24swg enamelled copper wire on ferrite core
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612. E-mail: sales@semelab.co.uk Website http://www.semelab.co.uk
Prelim. 01/01

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