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| Not for new design, this product will be obsoleted soon BF998/BF998R/BF998RW Vishay Semiconductors N-Channel Dual Gate MOS-Fieldeffect Tetrode, Depletion Mode 2 1 Features * * * * * * * * * Integrated gate protection diodes Low noise figure e3 Low feedback capacitance High cross modulation performance Low input capacitance High AGC-range High gain Lead (Pb)-free component Component in accordance to RoHS 2002/95/EC and WEEE 2002/96/EC SOT143 3 1 4 2 SOT143R 4 1 3 2 SOT343R Applications * Input and mixer stages in UHF tuners 4 3 Electrostatic sensitive device. Observe precautions for handling. 19216 Mechanical Data Typ: BF998 Case: SOT143 Plastic case Weight: approx. 8.0 mg Marking: MO Pinning: 1 = Source, 2 = Drain, 3 = Gate 2, 4 = Gate 1 Typ: BF998R Case: SOT143R Plastic case Weight: approx. 8.0 mg Marking: MOR Pinning: 1 = Source, 2 = Drain, 3 = Gate 2, 4 = Gate 1 Typ: BF998RW Case: SOT343R Plastic case Weight: approx. 6.0 mg Marking: WMO Pinning: 1 = Source, 2 = Drain, 3 = Gate 2, 4 = Gate 1 Parts Table Part BF998 BF998A BF998R BF998RA BF998RW BF998RAW BF998RBW Ordering code BF998A-GS08 BF998A-GS08 BF998RA-GS08 BF998RA-GS08 BF998RAW-GS08 or BF998RBW-GS08 BF998RAW-GS08 BF998RBW-GS08 Type Marking MO MO MOR MOR WMO WMO WMO Remarks SOT143 SOT143 SOT143R SOT143R SOT343R SOT343R SOT343R Document Number 85011 Rev. 1.8, 05-Sep-08 www.vishay.com 1 BF998/BF998R/BF998RW Vishay Semiconductors Absolute Maximum Ratings Tamb = 25 C, unless otherwise specified Parameter Drain - source voltage Drain current Gate 1/Gate 2 - source peak current Gate 1/Gate 2 - source voltage Total power dissipation Channel temperature Storage temperature range Tamb 60 C Test condition Symbol VDS ID IG1/G2SM VG1S/G2S Ptot TCh Tstg Value 12 30 10 7 200 150 - 65 to + 150 Unit V mA mA V mW C C Thermal Characteristics Parameter Channel ambient 1) Test condition 1) Symbol RthChA Value 450 Unit K/W on glass fibre printed board (25 x 20 x 1.5) mm3 plated with 35 m Cu Electrical DC Characteristics Tamb = 25 C, unless otherwise specified Parameter Drain - source breakdown voltage Gate 1 - source breakdown voltage Gate 2 - source breakdown voltage Gate 1 - source leakage current Gate 2 - source leakage current Test condition ID = 10 A, - VG1S = - VG2S = 4 V IG1S = 10 mA, VG2S = VDS = 0 IG2S = 10 mA, VG1S = VDS = 0 VG1S = 5 V, VG2S = VDS = 0 VG2S = 5 V, VG1S = VDS = 0 BF998/ BF998R/ BF998RW Drain current VDS = 8 V, VG1S = 0, VG2S = 4 V BF998A/ BF998RA/ BF998RAW BF998RBW Gate 1 - source cut-off voltage Gate 2 - source cut-off voltage VDS = 8 V, VG2S = 4 V, ID = 20 A VDS = 8 V, VG1S = 0, ID = 20 A Part Symbol V(BR)DS V(BR)G1SS V(BR)G2SS IG1SS IG2SS IDSS 4 Min. 12 7 7 14 14 50 50 18 Typ. Max. Unit V V V nA nA mA IDSS IDSS - VG1S(OFF) - VG2S(OFF) 4 9.5 1.0 0.6 10.5 18 2.0 1.0 mA mA V V Electrical AC Characteristics Tamb = 25 C, unless otherwise specified VDS = 8 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz Parameter Forward transadmittance Gate 1 input capacitance Gate 2 input capacitance Feedback capacitance Output capacitance VG1S = 0, VG2S = 4 V Test condition Symbol |y21s| Cissg1 Cissg2 Crss Coss Min. 21 Typ. 24 2.1 1.1 25 1.05 2.5 Max. Unit mS pF pF fF pF www.vishay.com 2 Document Number 85011 Rev. 1.8, 05-Sep-08 BF998/BF998R/BF998RW Vishay Semiconductors Parameter Test condition GS = 2 mS, GL = 0.5 mS, f = 200 MHz GS = 3,3 mS, GL = 1 mS, f = 800 MHz VG2S = 4 to -2 V, f = 800 MHz GS = 2 mS, GL = 0.5 mS, f = 200 MHz GS = 3,3 mS, GL = 1 mS, f = 800 MHz Symbol Gps Gps Gps F F 16.5 40 1.0 1.5 Min. Typ. 28 20 Max. Unit dB dB dB dB dB Power gain AGC range Noise figure Common Source S-Parameters Tamb = 25 C, unless otherwise specified VDS = 8 V, VG2S = 4 V, Z0 = 50 ID/mA f/MHz LOG MAG S11 ANG deg 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 - 0.03 - 0.15 - 0.34 - 0.70 - 1.03 - 1.33 - 1.62 - 1.92 - 2.21 - 2.49 - 2.80 - 3.07 - 3.31 - 0.05 - 0.16 - 0.48 - 0.76 - 1.11 - 1.43 - 1.75 - 2.07 - 2.40 - 2.70 - 3.03 - 3.32 - 3.59 - 0.05 - 0.17 - 0.50 - 0.81 - 1.18 - 1.52 - 1.86 - 2.20 - 2.53 - 2.86 - 3.21 - 3.50 - 3.80 - 7.2 - 14.1 - 20.9 - 32.1 - 39.2 - 45.8 - 52.3 - 58.7 - 64.7 - 70.7 - 76.6 - 82.5 - 88.6 - 9.0 - 18.7 - 26.0 - 33.7 - 41.2 - 48.3 - 55.1 - 61.6 - 67.9 - 74.2 - 80.2 - 86.4 - 92.3 - 9.4 - 19.4 - 27.1 - 35.0 - 42.9 - 50.3 - 57.2 - 63.9 - 70.4 - 76.8 - 82.9 - 89.0 - 95.1 5.71 5.51 5.20 2.01 1.45 0.94 0.43 - 0.10 - 0.59 - 1.12 - 1.52 - 1.93 - 2.35 5.19 5.58 4.45 3.95 3.40 2.88 2.39 1.88 1.39 0.90 0.50 0.13 - 0.28 6.07 6.44 5.31 4.80 4.23 3.72 3.22 2.72 2.24 1.74 1.34 0.95 0.56 LOG MAG S21 ANG deg 168.8 157.3 134.7 121.3 108.4 96.5 85.0 74.1 63.6 53.1 43.7 33.6 24.1 165.3 151.8 136.3 123.3 110.9 99.5 88.7 78.1 67.9 57.9 48.7 38.9 29.6 165.4 152.0 136.7 123.8 111.5 100.3 89.6 79.4 69.2 59.4 50.2 40.8 31.5 - 55.94 - 50.26 - 48.51 - 46.98 - 46.40 - 46.40 - 47.02 - 47.53 - 47.81 - 48.52 - 48.53 - 46.95 - 44.44 - 56.24 - 49.97 - 47.91 - 46.48 - 45.91 - 45.91 - 46.53 - 47.13 - 47.41 - 48.21 - 48.43 - 47.04 - 44.54 - 55.74 - 49.47 - 47.41 - 45.98 - 45.41 - 45.41 - 46.13 - 46.63 - 47.00 - 47.91 - 48.33 - 47.04 - 44.53 LOG MAG S12 ANG deg 83.6 76.8 67.7 62.8 57.8 57.3 58.9 63.3 73.1 83.5 102.1 120.4 131.7 81.9 75.0 67.2 61.8 56.3 55.8 56.7 60.7 69.9 80.0 98.9 118.2 130.5 81.4 74.6 66.4 60.8 55.1 54.4 54.9 58.5 67.3 76.7 95.2 115.3 128.7 - 0.08 - 0.13 - 0.29 - 0.44 - 0.59 - 0.76 - 0.91 - 1.08 - 1.26 - 1.45 - 1.57 - 1.75 - 1.92 - 0.11 - 0.21 - 0.33 - 0.47 - 0.65 - 0.81 - 0.96 - 1.12 - 1.32 - 1.49 - 1.61 - 1.79 - 1.96 - 0.15 - 0.24 - 0.36 - 0.52 - 0.68 - 0.84 - 1.02 - 1.16 - 1.35 - 1.53 - 1.66 - 1.84 - 2.00 LOG MAG S22 ANG deg - 3.6 - 7.0 - 9.7 - 12.3 - 15.1 - 17.4 - 19.7 - 22.0 - 24.3 - 26.2 - 28.4 - 30.5 - 32.7 - 3.5 - 7.2 - 9.8 - 12.6 - 15.3 - 17.8 - 20.0 - 22.4 - 24.6 - 26.6 - 28.8 - 31.0 - 33.3 - 3.6 - 7.3 - 10.0 - 12.9 - 15.7 - 18.0 - 20.4 - 22.7 - 25.0 - 27.1 - 29.4 - 31.6 - 33.9 www.vishay.com 3 5 10 15 Document Number 85011 Rev. 1.8, 05-Sep-08 BF998/BF998R/BF998RW Vishay Semiconductors Typical Characteristics Tamb = 25 C, unless otherwise specified 300 Ptot - Total Power Dissipation (mW) 20 250 ID - Drain Current (mA) 16 12 8 200 150 100 50 0 0 20 40 60 80 100 120 140 160 12817 4V VDS = 8 V 5V 3V 2V 1V 0 4 VG1S = - 1 V 0 - 0.6 - 0.2 0.2 0.6 1.0 1.4 96 12159 Tamb - Ambient Temperature (C) VG2S - Gate 2 Source Voltage (V) Figure 1. Total Power Dissipation vs. Ambient Temperature Figure 4. Drain Current vs. Gate 2 Source Voltage 25 V G2S = 4 V Cissg1 - Gate 1 Input Capacitance (pF) 30 V G1S = 0.6 V 0.4 V 0.2 V 0 - 0.2 V - 0.4 V 0 0 12812 3.0 2.5 2.0 1.5 1.0 0.5 0.0 - 2 - 1.5 V DS = 8 V V G2S = 4 V f = 1 MHz ID - Drain Current (mA) 20 15 10 5 2 4 6 8 10 -1 - 0.5 0 0.5 1.0 1.5 VDS - Drain Source Voltage (V) 12863 VG1S - Gate 1 Source Voltage (V) Figure 2. Drain Current vs. Drain Source Voltage Figure 5. Gate 1 Input Capacitance vs. Gate 1 Source Voltage 20 VDS = 8 V 6V 5V 4V 12 8 4 0 - 0.8 12816 Coss - Output Capacitance (pF) 3V 2V 1V 3.0 2.5 2.0 1.5 1.0 0.5 0.0 1.2 12864 ID - Drain Current (mA) 16 VG2S = 4 V f = 1 MHz 0 VG2S = - 1 V - 0.4 0.0 0.4 0.8 2 4 6 8 10 12 VG1S - Gate 1 Source Voltage (V) VDS - Drain Source Voltage (V) Figure 3. Drain Current vs. Gate 1 Source Voltage Figure 6. Output Capacitance vs. Drain Source Voltage www.vishay.com 4 Document Number 85011 Rev. 1.8, 05-Sep-08 BF998/BF998R/BF998RW Vishay Semiconductors 10 f = 800 MHz - Transducer Gain (dB) 0 - 10 - 20 4V 3V 2V 1V 0 - 0.2 V Im (y21) (ms) 5 0 -5 - 10 - 15 - 20 - 25 - 30 - 35 - 40 1300 MHz 0 12821 V DS = 8 V V G2S = 4 V f = 100...1300 MHz I D = 5 mA 10 mA 20 mA f = 100 MHz 400 MHz 700 MHz 1000 MHz - 30 - 0.4 V - 40 - 50 - 1.0 VG2S = - 0.8 V - 0.5 0.0 0.5 1.0 1.5 S 21 2 4 8 12 16 20 24 28 32 12818 VG1S - Gate 1 Source Voltage (V) Re (y21) (mS) Figure 7. Transducer Gain vs. Gate 1 Source Voltage Figure 10. Short Circuit Forward Transfer Admittance y21s - Forward Transadmittance (ms) 32 28 24 20 16 12 8 4 0 0 0 4 8 12 16 20 24 28 ID - Drain Current (mA) 1V 2V VDS = 8 V f = 1 MHz VG2S = 4 V 3V Im (y22) (ms) 9 8 7 6 5 4 3 2 1 0 0.00 12822 f = 1300 MHz 1000 MHz 700 MHz 400 MHz 100 MHz 0.25 0.50 V DS = 15 V V G2S = 4 V I D =10 mA f = 100...1300 MHz 1.00 1.25 1.50 0.75 12819 Re (y22) (mS) Figure 8. Forward Transadmittance vs. Drain Current Figure 11. Short Circuit Output Admittance 20 18 16 14 Im (y11) (ms) 12 10 8 6 4 2 0 0 12820 f = 1300 MHz 1000 MHz 700 MHz V DS = 8 V V G2S = 4 V I D = 10 mA f = 100...1300 MHz 6 8 10 12 14 400 MHz 100 MHz 2 4 Re (y11) (mS) Figure 9. Short Circuit Input Admittance Document Number 85011 Rev. 1.8, 05-Sep-08 www.vishay.com 5 BF998/BF998R/BF998RW Vishay Semiconductors VDS = 8 V, ID = 10 mA, VG2S = 4 V, Z0 = 50 S11 j 120 j0.5 j2 400 150 j0.2 j5 100 0 0.2 0.5 1 2 5 100 - j0.2 1300 MHz 1000 - j0.5 12960 S21 90 700 60 1000 30 1300 MHz 180 1 2 0 - j5 - 150 - j2 - 30 -j - 120 12962 - 60 - 90 Figure 12. Input Reflection Coefficient Figure 14. Forward Transmission Coefficient S12 90 120 60 S22 j j0.5 150 1200 1300 MHz 180 200 100 0.08 0.16 0 0 0.2 0.5 1 2 5 100 - j5 1300 MHz - j2 -j 30 j0.2 j5 j2 - j0.2 - 150 - 30 - j0.5 - 120 12973 - 60 - 90 12963 Figure 13. Reverse Transmission Coefficient Figure 15. Output Reflection Coefficient www.vishay.com 6 Document Number 85011 Rev. 1.8, 05-Sep-08 BF998/BF998R/BF998RW Vishay Semiconductors Package Dimensions in millimeters (inches): SOT143 0.1 [0.004] max. 1.1 [0.043] 2.6 [0.102] 2.35 [0.093] 1.8 [0.071] 1.6 [0.063] 0.5 [0.020] 0.35 [0.014] 0.9 [0.035] 0.75 [0.030] foot print recommendation: 3 [0.118] 2.8 [0.110] 0.5 [0.020] 0.35 [0.014] 0.5 [0.020] 0.35 [0.014] 0.15 [0.006] 0.08 [0.003] 1.7 [0.067] 0.9 [0.035] 0.9 [0.035] 0.8 [0.031] 1.2 [0.047] 1.4 [0.055] 1.2 [0.047] 0.9 [0.035] 0.8 [0.031] 2 [0.079] 2 [0.079] 1.8 [0.071] 0.8 [0.031] 1.9 [0.075] 96 12240 Package Dimensions in millimeters (inches): SOT143R 96 12239 Document Number 85011 Rev. 1.8, 05-Sep-08 www.vishay.com 7 BF998/BF998R/BF998RW Vishay Semiconductors Package Dimensions in millimeters (inches): SOT343R 96 12238 www.vishay.com 8 Document Number 85011 Rev. 1.8, 05-Sep-08 BF998/BF998R/BF998RW Vishay Semiconductors Ozone Depleting Substances Policy Statement It is the policy of Vishay Semiconductor GmbH to 1. Meet all present and future national and international statutory requirements. 2. Regularly and continuously improve the performance of our products, processes, distribution and operating systems with respect to their impact on the health and safety of our employees and the public, as well as their impact on the environment. It is particular concern to control or eliminate releases of those substances into the atmosphere which are known as ozone depleting substances (ODSs). The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs and forbid their use within the next ten years. Various national and international initiatives are pressing for an earlier ban on these substances. Vishay Semiconductor GmbH has been able to use its policy of continuous improvements to eliminate the use of ODSs listed in the following documents. 1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments respectively 2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental Protection Agency (EPA) in the USA 3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively. Vishay Semiconductor GmbH can certify that our semiconductors are not manufactured with ozone depleting substances and do not contain such substances. We reserve the right to make changes to improve technical design and may do so without further notice. Parameters can vary in different applications. All operating parameters must be validated for each customer application by the customer. Should the buyer use Vishay Semiconductors products for any unintended or unauthorized application, the buyer shall indemnify Vishay Semiconductors against all claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal damage, injury or death associated with such unintended or unauthorized use. Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany Document Number 85011 Rev. 1.8, 05-Sep-08 www.vishay.com 9 Legal Disclaimer Notice Vishay Disclaimer All product specifications and data are subject to change without notice. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document Number: 91000 Revision: 18-Jul-08 www.vishay.com 1 |
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