TetraFET DMD5028 DMD5028-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 – 50V – 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 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 PIN 2 PIN 4 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 K DRAIN 1 GATE 2 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 • SIMPLE BIAS CIRCUITS • ULTRA-LOW THERMAL RESISTANCE • BeO FREE • LOW Crss • HIGH GAIN – 20 dB MINIMUM APPLICATIONS • VHF/UHF COMMUNICATIONS from 1 MHz to 175 MHz Power Dissipation Drain – Source Breakdown Voltage * Gate – Source Breakdown Voltage* Drain Current* Storage Temperature Maximum Operating Junction Temperature 875W (438W -A Version) 125V ±20V 18A –65 to 150°C 200°C * 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: [email protected] Document Number 6684 Issue 2 DMD5028 DMD5028-A ELECTRICAL CHARACTERISTICS (Tcase = 25°C 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 = 125V VGS = 0 6 mA 6 μA 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 = 3A ID = 10mA VDS = VGS VGS(th)match Gate Threshold Voltage Matching Between Sides V VGS = 0 125 1 mhos 4.8 0.1 V TOTAL DEVICE GPS Common Source Power Gain PO = 300W η Drain Efficiency VDS = 50V VSWR Load Mismatch Tolerance f = 175MHz Ciss Input Capacitance VDS = 50V VGS = –5V f = 1MHz 360 pF Coss Output Capacitance VDS = 50V VGS = 0 f = 1MHz 150 pF Crss Reverse Transfer Capacitance VDS = 50V VGS = 0 f = 1MHz 9 pF IDQ = 1.2A 20 dB 60 % 20:1 — PER SIDE * Pulse Test: Pulse Duration = 300 μs , Duty Cycle ≤ 2% THERMAL DATA RTHj–case Thermal Resistance Junction – Case Max. 0.2°C / 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: [email protected] Document Number 6684 Issue 2 DMD5028 DMD5028-A 70 25 60 % 20 Efficiency 15 Gain dB Vds = 50V Idq = 1.2A f =175MHz 10 5 50 40 30 Vds = 50V Idq = 1.2A f =175MHz 20 10 0 0 50 100 150 200 250 Pout W 300 350 400 0 0 50 100 Gain (dB) 150 200 250 Pout W Figure 1 – Gain vs. Power Output. 300 350 400 Efficiency (%) Figure 2 – Efficiency vs. Power Output. -10 -15 -20 IMD3 dBc -25 f1 = 175 MHz f2 = 175.1 MHz Vds = 50V Idq = 1.2A -30 -35 -40 0 50 100 150 200 250 300 350 400 Pout W PEP 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: [email protected] Document Number 6684 Issue 2 DMD5028 DMD5028-A 18.00 16.00 14.00 Vg=12 V Vg=10 V Vg=8V Vg=6 V Vg=4V 12.00 10.00 IDS (A) 8.00 6.00 4.00 2.00 0.00 0.00 10.00 20.00 30.00 40.00 50.00 VDS (V) Figure 4 – Typical IV Characteristics. Capacitance pF 1000 100 Coss, pF Ciss, pF Crss, pF 10 1 0 10 20 Vds V 30 40 50 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: [email protected] Document Number 6684 Issue 2 DMD5028 DMD5028-A 50 M1 M1 RF in 6-60pF RF out 0.1u 6-60pF DMD5028 5000pF Gate Bias L1 L2 0.47u Drain Bias 47pF 180pF 1K 0.1u 1nF 1.5K 1000pF 1nF 5000pF DMD5028 TX1 0.1u M1 M1 TX2 50 DMD5028 175MHz TEST FIXTURE TX1 TX2 L1 L2 M1 9:1 transformer. 3 turns of 062-25 semi-rigid coax around 75-26 powdered iron core 4:1 transformer. 2 turns of 090-25 semi-rigid coax around 100-8 powdered iron core 10 turns 16awg enamelled wire, 5mm internal diameter 0.5 turns 16 awg enamelled wire on A1 x 1 2-hole core microstrip line, 20mm long, 1mm wide on 0.062in thick G10 substrate 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: [email protected] Document Number 6684 Issue 2