TetraFET DMD1028 DMD1028-A ROHS COMPLIANT METAL GATE RF SILICON FET MECHANICAL DATA B C (2 pls) 2 G (typ) 3 1 H P (2 pls) A D 5 4 E (4 pls) GOLD METALLISED MULTI-PURPOSE SILICON DMOS RF FET 300W - 28V - 175MHz PUSH-PULL F I FEATURES * SUITABLE FOR BROAD BAND APPLICATIONS N PIN 1 PIN 3 PIN 5 M O SOURCE (COMMON) DRAIN 2 GATE 1 DIM A B C D E F G H I J K M N O P J D1 Millimetres 15.24 10.80 45 9.78 8.38 27.94 1.52R 10.16 21.84 0.10 1.96 1.02 4.45 34.04 1.63R PD BVDSS BVGSS ID(sat) Tstg Tj PIN 2 PIN 4 K DRAIN 1 GATE 2 * SIMPLE BIAS CIRCUITS * ULTRA-LOW THERMAL RESISTANCE * BeO FREE Tol. 0.50 0.13 5 0.13 0.13 0.13 0.13 0.15 0.23 0.02 0.13 0.13 0.38 0.13 0.13 Inches 0.600 0.425 45 0.385 0.330 1.100 0.060R 0.400 0.860 0.004 0.077 0.040 0.175 1.340 0.064R Tol. 0.020 0.005 5 0.005 0.005 0.005 0.005 0.006 0.009 0.001 0.005 0.005 0.015 0.005 0.005 * LOW Crss * HIGH GAIN - 16 dB MINIMUM APPLICATIONS * VHF/UHF COMMUNICATIONS from 1 MHz to 400 MHz Power Dissipation Drain - Source Breakdown Voltage * Gate - Source Breakdown Voltage* Drain Current* Storage Temperature Maximum Operating Junction Temperature 875W (438W -A Version) 70V 20V 30A -65 to 150C 200C * Per Side Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. Website: http://www.semelab.co.uk E-mail: sales@semelab.co.uk Document Number 6509 Issue 3 DMD1028 DMD1028-A ELECTRICAL CHARACTERISTICS (Tcase = 25C unless otherwise stated) Parameter Test Conditions Min. Typ. Max. Unit PER SIDE BVDSS IDSS Drain-Source Breakdown Voltage Zero Gate Voltage Drain Current ID = 100mA VDS = 28V VGS = 0 6 mA 1 A 7 V IGSS Gate Leakage Current VGS = 20V VDS = 0 VGS(th) Gate Threshold Voltage* ID = 10mA VDS = VGS gfs Forward Transconductance* VDS = 10V ID = 6A ID = 10mA VDS = VGS VGS(th)match Gate Threshold Voltage Matching Between Sides V VGS = 0 70 1 mhos 4.8 0.1 V TOTAL DEVICE GPS Common Source Power Gain PO = 300W Drain Efficiency VDS = 28V VSWR Load Mismatch Tolerance f = 175MHz Ciss Input Capacitance VDS = 28V VGS = -5V f = 1MHz 360 pF Coss Output Capacitance VDS = 28V VGS = 0 f = 1MHz 180 pF Crss Reverse Transfer Capacitance VDS = 28V VGS = 0 f = 1MHz 15 pF IDQ = 2A 16 dB 60 % 20:1 -- PER SIDE * Pulse Test: Pulse Duration = 300 s , Duty Cycle 2% THERMAL DATA RTHj-case Thermal Resistance Junction - Case Max. 0.2C / W 0.4 C / W -A Version Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. Website: http://www.semelab.co.uk E-mail: sales@semelab.co.uk Document Number 6509 Issue 3 DMD1028 DMD1028-A 90 25 80 20 % 60 Efficiency 70 50 15 Gain dB Vds = 28V Idq = 2A f =175MHz 10 5 40 Vds = 28V Idq = 2A f =175MHz 30 20 10 0 0 50 100 150 200 Pout W 250 300 350 Gain (dB) 0 0 50 100 150 200 Pout W Figure 1 - Gain vs. Power Output. 250 300 350 Efficiency (%) Figure 2 - Efficiency vs. Power Output. -10 -20 IMD3 -30 dBc f1 = 175 MHz f2 = 175.1 MHz Vds = 28V Idq = 2A -40 -50 -60 0 50 100 150 200 Pout W PEP 250 300 350 IMD3 (dBc) Figure 3 - IMD vs. Power Output Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. Website: http://www.semelab.co.uk E-mail: sales@semelab.co.uk Document Number 6509 Issue 3 DMD1028 DMD1028-A 40 35 Vg=13 V Vg=12 V Vg=11 V Vg=10 V Vg=9V Vg=8 V Vg=7 V Vg=6 V Vg=5 V 30 25 IDS (A) 20 15 10 5 0 0.00 5.00 10.00 15.00 20.00 25.00 30.00 35.00 VDS (V) Figure 4 - Typical IV Characteristics. Capacitance pF 1000 100 Output capacitance Input Capacitance Reverse transfer capacitance 10 1 0 5 10 15 20 25 30 Vds V Figure 5 - Typical CV Characteristics. Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. Website: http://www.semelab.co.uk E-mail: sales@semelab.co.uk Document Number 6509 Issue 3 DMD1028 DMD1028-A L2 10k Gate-Bias 100n 1n 1n 100k L1 T2 28V 100n 12 1n 1000u T4 DMD1028 680pF T6 1u T1 2-18 pF 90pF 47pF 2-18 pF 680pF 1u T5 T3 DMD1028 DMD1028 175MHz TEST FIXTURE Substrate 1.6mm PTFE/glass, Er=2.5 All microstrip lines W=4.4mm T1,2,3 T4,5 T6 L1 L2 7cm Storm Products EXE18 19/30 S1TW coaxial cable on Siemens B62152A1X1 2-hole core. 14cm Storm Products EXE18 19/30 S1TW coaxial cable. 11cm Storm Products EXE18 19/30 S1TW coaxial cable 6 turns 1.2mm dia wire, 5mm internal diameter 1.5 turns 0.9mm dia wire on Siemens A1 x 1 2 hole core Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in its use. Semelab encourages customers to verify that datasheets are current before placing orders. Semelab plc. Telephone +44(0)1455 556565. Fax +44(0)1455 552612. Website: http://www.semelab.co.uk E-mail: sales@semelab.co.uk Document Number 6509 Issue 3