SD2942 HF/VHF/UHF RF power N-channel MOSFETs Features Gold metallization Excellent thermal stability Common source configuration, push pull POUT = 350 W min. with 15 db gain @ 175 MHz Low RDS(on) Description M244 Epoxy sealed The SD2942 is a gold metallized N-channel MOS field-effect RF power transistor. The SD2942 offers 25% lower RDS(ON) than industry standard and 20% higher power saturation than ST SD2932. These characteristics make the SD2942 ideal for 50 V DC very high power applications up to 250 MHz. Figure 1. Pin connection 1 1 3 1. Drain 2. Gate 3. Source Table 1. 3 2 2 Device summary Order code SD2942W Marking (1) SD2942 Base qty. Package Packaging 15 M244 Tube 1. For more details please refer to Chapter 7: Marking, packing and shipping specifications. October 2011 Doc ID 11736 Rev 4 1/17 www.st.com 17 Content SD2942 Content 1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Typical performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 7 Marking, packing and shipping specifications . . . . . . . . . . . . . . . . . . . 15 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2/17 Doc ID 11736 Rev 4 SD2942 Electrical data 1 Electrical data 1.1 Maximum rating TCASE = 25 C Table 2. Absolute maximum rating Symbol Parameter Value Unit 130 V Drain-gate voltage (RGS = 1M) 130 V Gate-source voltage 20 V Drain current 40 A Power dissipation 500 W Max. operating junction temperature +200 C -65 to +150 C Value Unit 0.35 C/W V(BR)DSS(1) Drain source voltage VDGR(1) VGS ID PDISS TJ TSTG Storage temperature 1. TJ = 150 C 1.2 Thermal data Table 3. Symbol RthJC Thermal data Parameter Junction to case thermal resistance Doc ID 11736 Rev 4 3/17 Electrical characteristics 2 SD2942 Electrical characteristics TCASE = 25C Table 4. Static (per section) Symbol Test conditions Min. VGS = 0 V IDS = 100 mA 130 IDSS VGS = 0 V VDS = 50 V 100 A IGSS VGS = 20 V VDS = 0 V 250 nA VGS(Q) VDS = 10 V ID = 250 mA 4 V VDS(ON) VGS = 10 V ID = 10 A 3.0 V GFS VDS = 10 V ID = 5 A CISS VGS = 0 V VDS = 50 V f = 1 MHz 415 pF COSS VGS = 0 V VDS = 50 V f = 1 MHz 236 pF CRSS VGS = 0 V VDS = 50 V f = 1 MHz 17 pF V(BR)DSS (1) Typ. Max. Unit V 1.5 5 mho 1. TJ = 150 C Table 5. Dynamic Symbol 4/17 Test Conditions f = 175MHz Min. Typ. Unit POUT VDD = 50 V IDQ = 500 mA GPS VDD = 50 V IDQ = 500 mA POUT = 350 W f = 175MHz 15 17 dB D VDD = 50 V IDQ = 500 mA POUT = 350 W f = 175MHz 55 61 % VDD = 50 V IDQ = 500 mA POUT = 350 W f = 175MHz Load mismatch all phase angles 5:1 Doc ID 11736 Rev 4 350 Max. W VSWR SD2942 3 Impedance Impedance Figure 2. Impedance data schematic D ZDL Typical Drain Load Impedance Typical Input Impedance G ZIN S Table 6. Impedance data f ZIN () ZDL () 250 MHz 1.3 - j 1.9 1.9 + j 3.2 230 MHz 1.2 - j 1.8 2.1 + j 3.7 200 MHz 1.1 - j 1.6 2.7 +j 4.2 175 MHz 1.0 - j 1.4 3.3 + j 4.8 100 MHz 1.8 - j 2.5 7.5 + j 9 50 MHz 3.2 - j 4.4 10 + j 12 Doc ID 11736 Rev 4 5/17 Typical performance SD2942 4 Typical performance Figure 3. Capacitance vs drain voltage Figure 4. 1000 Drain current vs gate voltage 20 CISS Vds = 10 V 18 16 14 100 12 Id (A) Capacitance (pF) COSS CRSS 10 8 10 6 Freq = 1 MHz 4 Tc = +80 C 2 Tc = +25 C Tc = -20 C 0 1 0 5 10 15 20 25 30 35 40 45 50 0 55 1 2 Gate-source voltage vs case temperature Figure 6. 1.15 20 1.10 19 1.05 Id = 11 A Id = 10 A Id = 7 A Id = 9 A 5 Id = 5 A Power gain vs POUT and case temperature -20C Id = 4 A +25C 16 15 Id = 2 A 0.90 +80C 14 Id = 1 A Id = 0.25 A 0.85 Vdd = 50V Idq = 2 x 250mA Freq = 175 MHz 13 Id = 0.1 A 0.80 -25 12 0 25 50 75 100 0 o Tc ( C) 6/17 6 17 1.00 0.95 4 18 Gain (dB) Vgs (V - Normalized) Figure 5. 3 Vgs (V) Vdd (V) 50 100 150 200 250 Pout (W) Doc ID 11736 Rev 4 300 350 400 450 500 SD2942 Typical performance Figure 7. Efficiency vs case temperature Figure 8. 70 POUT vs input power and case temperature 500 +25C 450 -20C 60 -20C +25C 400 +80C 350 +80C 300 40 Pout (W) Nd (%) 50 30 250 200 150 20 100 Vdd = 50V Idq = 2 x 250mA Freq = 175 MHz 10 Vdd = 50V Idq = 2 x 250mA Freq = 175 MHz 50 0 0 0 50 100 Figure 9. 150 200 250 300 Pout (W) 350 400 450 0 500 1 2 3 4 5 6 7 8 POUT vs input power and drain voltage 10 11 12 13 Figure 10. POUT vs gate voltage and case temperature 500 500 450 450 50V 400 400 350 350 40V 250 200 150 150 100 100 Freq = 175 MHz Idq = 2 x 250mA +25C 250 200 50 - 20C 300 Pout (W) 300 Pout (W) 9 Pin (W) +80C Freq = 175 MHz Idq = 2 x 250mA Pin = 7W 50 0 0 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 -4 -3 -2 -1 0 1 2 3 4 Vgs (V) Pin (W) Doc ID 11736 Rev 4 7/17 Typical performance SD2942 Figure 11. POUT vs drain voltage and input power Figure 12. Maximum thermal resist vs case temperature 500 0.42 Pin = 10W 450 0.40 400 Rth(j-c) ( C/W) Pin = 7W o Pout (W) 350 300 0.38 250 Pin = 5W 0.36 200 150 Freq = 175 MHz Idq = 2 x 250mA 0.34 100 25 24 28 32 36 40 44 48 30 35 40 45 50 52 55 60 65 70 75 80 85 o Tc ( C) Vdd (V) Figure 13. Maximum safe operating area -AX $RAIN #URRENT )D ! 4CASE # 4J # $# M3 M3 $RAIN SUPPLY VOLTAGE 6DD 6 8/17 Doc ID 11736 Rev 4 !-V SD2942 Typical performance 4RANSIENT 4HERMAL )MPEDANCE :TH J C #7 Figure 14. Transient thermal impedance 3INGLE PULSE % % % % % 2ECTANGULAR 0OWER 0ULSE 7IDTH SEC !-V Figure 15. Transient thermal model Doc ID 11736 Rev 4 9/17 Test circuit 5 SD2942 Test circuit Figure 16. 175 MHz test circuit schematic Note: 10/17 1 Dimensions at component symbols are references for component placement. 2 Gap between ground and transmission lines is + 0.002{0.05} - 0.000{0.00} Typ. Doc ID 11736 Rev 4 SD2942 Table 7. Test circuit 175 MHz test circuit component list Symbol Description R1,R2,R5,R6 470 1 W, surface mount chip resistor R3,R4 360 0.5 W, carbon comp. axial lead resistor or equivalent R7,R8 560 2 W, resistor two turn wire air-wound axial lead resistor R9,R10 20 K 3.09 W, 10 turn wirewound precision potentiometer C1,C4 680 pF ATC 130B surface mount ceramic chip capacitor C2,C3,C7,C8,C17,C19,C20,C21 10000 pF ATC 200B surface mount ceramic chip capacitor C5 75 pF ATC 100B surface mount ceramic chip capacitor C6 ST40 25 pF - 115 pF miniature variable trimmer C9,C10 47 pF ATC 100B surface mount ceramic chip capacitor C11,C12, C13 43 pF ATC 100B surface mount ceramic chip capacitor C14,C15,C24,C25 1200 pF ATC 700B surface mount ceramic chip capacitor C16,C18 470 pF ATC 700B surface mount ceramic chip capacitor C22,C23 0.1 F / 500 V surface mount ceramic chip capacitor C26,C27 0.01 F / 500 V surface mount ceramic chip capacitor C28 10 F / 63 aluminum electrolytic axial lead capacitor B1 50 RG316 O.D 0.076[1.93] L = 11.80[299.72] flexible coaxial cable 4 turns through ferrite bead B2 50 RG-142B O.D 0.165[4.19] L = 11.80[299.72] flexible coaxial cable T1 R.F. transformer 4:1, 25 O.D RG316-25 O.D 0.080[2.03] L = 5.90[149.86] flexible coaxial cable 2 turns through ferrite bead multi-aperture core T2 R.F. transformer 1:4, 25 semi-rigid coaxial cable O.D. 0.141[3.58] L = 5.90[149.86] L1 Inductor 1/4 wave 50 O.D 0.165[4.19] L = 11.80 [299.72] flexible coaxial cable 2 turns through ferrite bead FB1,FB5 Shield bead FB2,FB6 Multi-aperture core FB3 Multilayer ferrite chip bead (surface mount) FB4 Surface mount EMI shield bead PCB Woven glass reinforced ptfe microwave Laminate 0.06", 1 oz EDCu, both sides, r = 2.55 Doc ID 11736 Rev 4 11/17 Test circuit SD2942 4 inches Figure 17. 175 MHz test circuit photomaster 8.50 inches Figure 18. 175 MHz test circuit 12/17 Doc ID 11736 Rev 4 SD2942 6 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK(R) specifications, grade definitions and product status are available at: www.st.com. ECOPACK is an ST trademark. Table 8. M244 (.400 x .860 4/L BAL N/HERM W/FLG) mm. inch DIM. Min. A Typ. 5.59 B Max. Min. 5.84 0.220 5.08 Typ. Max. 0.230 0.200 C 3.02 3.28 0.119 0.129 D 9.65 9.91 0.380 0.390 E 19.81 20.82 0.780 0.820 F 10.92 11.18 0.430 0.440 G 27.94 1.100 H 33.91 34.16 1.335 1.345 I 0.10 0.15 0.004 0.006 J 1.52 1.78 0.060 0.070 K 2.59 2.84 0.102 0.112 L 4.83 5.84 0.190 0.230 M 10.03 10.34 0.395 0.407 N 21.59 22.10 0.850 0.870 Doc ID 11736 Rev 4 13/17 Package mechanical data SD2942 Figure 19. M244 package dimensions ng Dimensions are in inches 14/17 Doc ID 11736 Rev 4 SD2942 7 Marking, packing and shipping specifications Marking, packing and shipping specifications Table 9. Packing and shipping specifications Order code Packaging Pcs per tray Dry pack humidity Lot code SD2942W Tube 15 < 10 % Not mixed Figure 20. Marking layout SD2942 Table 10. Marking specifications Symbol Description W Wafer process code CZ Assembly plant xxx Last 3 digits of diffusion lot VY Diffusion plant MAR Country of origin CZ Test and finishing plant y Assembly year yy Assembly week Doc ID 11736 Rev 4 15/17 Revision history 8 SD2942 Revision history Table 11. 16/17 Document revision history Date Revision Changes 18-Oct-2005 1 First Issue. 04-Jan-2006 2 Complete version. 14-Apr-2010 3 Added Figure 13, Figure 14 and Figure 15. 25-Oct-2011 4 Inserted Chapter 7: Marking, packing and shipping specifications. Doc ID 11736 Rev 4 SD2942 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST's terms and conditions of sale. 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