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| 2SK2685 GaAs HEMT ADE-208-400 1st. Edition Application UHF low noise amplifier Features * Excellent low noise characteristics. Fmin = 0.83 dB Typ. (3 V, 10 mA, 2 GHz) * High associated gain. Ga = 17 dB Typ. (3 V, 10 mA, 2 GHz) * High voltage. VDS = 6 or more voltage. * Small package. (CMPAK-4) Outline 2SK2685 Absolute Maximum Ratings (Ta = 25C) Item Drain to source voltage Gate to source voltage Gate to drain voltage Drain current Channel power dissipation Channel temperature Storage temperature Symbol VDSS VGSO VGDO ID Pch Tch Tstg Ratings 6 -6 -7 20 100 125 -55 to +125 Unit V V V mA mW C C Attention: This device is very sensitive to electro static discharge. It is recommended to adopt appropriate cautions when handling this transistor. Electrical Characteristics (Ta = 25C) Item Gate to source leak current Gate to source cutoff voltage Drain current Forward transfer admittance Associated gain Associated gain Associated gain Associated gain Minimum noise figure Minimum noise figure Minimum noise figure Minimum noise figure Note: Marking is "ZT-". Symbol I GSS VGS(off) I DSS |yfs| Ga Ga Ga Ga Fmin Fmin Fmin Fmin Min -- -0.3 35 40 -- -- 16 -- -- -- -- -- Typ -- -- 50 60 17.0 15.2 21.4 19.7 0.83 1.08 0.52 0.74 Max -20 -2.0 70 -- -- -- -- -- -- -- 1.0 -- Unit A V mA mS dB dB dB dB dB dB dB dB Test conditions VGS = -6 V, VDS = 0 VDS = 3 V, ID = 100 A VDS = 3 V, VGS = 0 (Pulse Test) VDS = 3 V, ID = 10 mA, f = 1 kHz VDS = 3 V, ID = 10 mA, f = 2 GHz VDS = 3 V, ID = 3 mA, f = 2 GHz VDS = 3 V, ID = 10 mA, f = 900 MHz VDS = 3 V, ID = 3 mA, f = 900 MHz VDS = 3 V, ID = 10 mA, f = 2 GHz VDS = 3 V, ID = 3 mA, f = 2 GHz VDS = 3 V, ID = 10 mA, f = 900 MHz VDS = 3 V, ID = 3 mA, f = 900 MHz 2 2SK2685 3 2SK2685 4 2SK2685 5 2SK2685 6 2SK2685 S Parameter (VDS = 1 V, ID = 10 mA, ZO = 50 ) Freq. (MHz) 200 400 600 800 1000 1200 1400 1600 1800 2000 S11 MAG. 0.996 0.980 0.977 0.970 0.952 0.938 0.916 0.896 0.882 0.859 ANG. -4.8 -9.5 -15.0 -19.9 -24.4 -29.2 -34.0 -38.2 -42.9 -47.1 S21 MAG. 5.12 5.13 5.07 4.94 4.84 4.74 4.67 4.55 4.47 4.36 ANG. 175.8 169.9 165.4 161.6 156.5 152.7 147.7 144.1 140.0 135.8 S12 MAG. 0.00691 0.0143 0.0210 0.0276 0.0399 0.0404 0.0462 0.0523 0.0578 0.0630 ANG. 89.8 88.2 83.3 81.5 79.3 76.0 74.8 73.1 72.0 70.3 S22 MAG. 0.688 0.682 0.674 0.668 0.658 0.648 0.636 0.622 0.611 0.597 ANG. -3.2 -6.5 -10.6 -13.8 -17.2 -20.7 -23.7 -27.1 -29.9 -33.1 S Parameter (VDS = 3 V, ID = 10 mA, ZO = 50 ) Freq. (MHz) 200 400 600 800 1000 1200 1400 1600 1800 2000 S11 MAG. 0.998 0.988 0.978 0.968 0.953 0.937 0.917 0.900 0.883 0.858 ANG. -4.0 -9.2 -14.5 -19.4 -24.2 -28.7 -33.3 -37.5 -41.9 -46.1 S21 MAG. 5.13 5.14 5.08 4.95 4.85 4.75 4.68 4.57 4.49 4.37 ANG. 175.8 170.1 165.2 161.4 156.4 152.5 147.8 144.0 140.1 135.9 S12 MAG. 0.00581 0.0110 0.0163 0.0216 0.0363 0.0312 0.0358 0.0401 0.0442 0.0477 ANG. 89.8 85.5 83.3 82.0 79.2 76.5 75.3 73.2 72.8 71.4 S22 MAG. 0.802 0.796 0.790 0.783 0.774 0.764 0.753 0.742 0.731 0.718 ANG. -3.2 -6.5 -9.8 -13.3 -16.4 -19.4 -22.5 -25.4 -28.1 -31.1 7 2SK2685 When using this document, keep the following in mind: 1. This document may, wholly or partially, be subject to change without notice. 2. All rights are reserved: No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without Hitachi's permission. 3. Hitachi will not be held responsible for any damage to the user that may result from accidents or any other reasons during operation of the user's unit according to this document. 4. Circuitry and other examples described herein are meant merely to indicate the characteristics and performance of Hitachi's semiconductor products. Hitachi assumes no responsibility for any intellectual property claims or other problems that may result from applications based on the examples described herein. 5. No license is granted by implication or otherwise under any patents or other rights of any third party or Hitachi, Ltd. 6. MEDICAL APPLICATIONS: Hitachi's products are not authorized for use in MEDICAL APPLICATIONS without the written consent of the appropriate officer of Hitachi's sales company. Such use includes, but is not limited to, use in life support systems. Buyers of Hitachi's products are requested to notify the relevant Hitachi sales offices when planning to use the products in MEDICAL APPLICATIONS. 8 |
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