16.0-30.0 GHz GaAs MMIC Buffer Amplifier B1004 April 2005 - Rev 01-Apr-05 Features Chip Device Layout High Dynamic Range Excellent LO Driver/Buffer Amplifier Low Noise or Power Bias Configurations 21.0 dB Small Signal Gain 2.2 dB Noise Figure at Low Noise Bias +19.0 dBm P1dB Compression Point at Power Bias 100% On-Wafer RF, DC and Noise Figure Testing 100% Visual Inspection to MIL-STD-883 Method 2010 General Description Mimix Broadband’s three stage 16.0-30.0 GHz GaAs MMIC buffer amplifier has a small signal gain of 21.0 dB with a noise figure of 2.2 dB across the band. This MMIC uses Mimix Broadband’s 0.15 µm GaAs PHEMT device model technology, and is based upon electron beam lithography to ensure high repeatability and uniformity. The chip has surface passivation to protect and provide a rugged part with backside via holes and gold metallization to allow either a conductive epoxy or eutectic solder die attach process. This device is well suited for Millimeter-wave Point-to-Point Radio, LMDS, SATCOM and VSAT applications. Absolute Maximum Ratings Supply Voltage (Vd) Supply Current (Id) Gate Bias Voltage (Vg) Input Power (Pin) Storage Temperature (Tstg) Operating Temperature (Ta) Channel Temperature (Tch) +6.5 VDC 200 mA +0.3 VDC +5 dBm -65 to +165 OC -55 to MTTF Table 5 MTTF Table 5 (5) Channel temperature affects a device's MTBF. It is recommended to keep channel temperature as low as possible for maximum life. Electrical Characteristics (Ambient Temperature T = 25 oC) Parameter Frequency Range (f ) Input Return Loss (S11) 3 Output Return Loss (S22) 3 Small Signal Gain (S21) 3 Gain Flatness (∆S21) Reverse Isolation (S12) 3 Noise Figure (NF) 4 Output Power for 1 dB Compression (P1dB) 1,2,3 Output Third Order Intercept Point (OIP3) 1,2,3 Saturated Output Power (Psat) 1,2,3 Drain Bias Voltage (Vd1,2) Gate Bias Voltage (Vg1c,2c) Supply Current (Id) (Vd=4.0V, Vg=-0.3V Typical) Units GHz dB dB dB dB dB dB dBm dBm dBm VDC VDC mA Min. 16.0 6.0 10.0 18.0 40.0 -1.2 - Typ. 14.0 14.0 21.0 +/-1.0 50.0 2.2 +19.0 +29.0 +22.0 +4.0 -0.3 90 Max. 30.0 24.0 3.0 +6.0 +0.1 180 (1) Optional low noise bias Vd1,2=4.0V, Id=90mA will typically yield 3-4dB decreased P1dB and OIP3. (2) Measured using constant current. (3) Unless otherwise indicated Min/Max over 17.0-28.0 GHz and biased at Vd=6.0V, Id1=90mA, Id2=90mA. (4) Unless otherwise indicated Min/Max over 17.0-28.0 GHz and biased at Vd=4.0V, Id1=45mA, Id2=45mA. Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Page 1 of 10 Characteristic Data and Specifications are subject to change without notice. ©2005 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 16.0-30.0 GHz GaAs MMIC Buffer Amplifier B1004 April 2005 - Rev 01-Apr-05 Buffer Amplifier Measurements 24 23 22 21 20 19 18 17 16 15 14 16.0 XB1004 Vd1,2=4.0 V Id1=22.5 mA, Id2=45 mA ~7000 Devices 0 Reverse Isolation (dB) Gain (dB) XB1004 Vd1,2=4.0 V Id1=22.5 mA, Id2=45 mA ~7000 Devices 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 -10 -20 -30 -40 -50 -60 -70 -80 16.0 30.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 27.0 28.0 29.0 30.0 Frequency (GHz) Frequency (GHz) + 3 sigma Median Mean Max - 3 sigma Input Return Loss (dB) Output Return Loss (dB) 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 16.0 17.0 18.0 19.0 20.0 Median Mean - 3 sigma 21.0 22.0 23.0 24.0 25.0 26.0 Frequency (GHz) Frequency (GHz) + 3 sigma Mean XB1004 Vd1,2=4.0 V Id1=22.5 mA, Id2=45 mA ~7000 Devices XB1004 Vd1,2=4.0 V Id1=22.5 mA, Id2=45 mA ~7000 Devices 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 -22 16.0 Median - 3 sigma + 3 sigma Median Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Mean - 3 sigma Page 2 of 10 Characteristic Data and Specifications are subject to change without notice. ©2005 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 16.0-30.0 GHz GaAs MMIC Buffer Amplifier B1004 April 2005 - Rev 01-Apr-05 Buffer Amplifier Measurements (cont.) XB1004 Vd1,2=4.0 V Id1=45 mA, Id2=45 mA ~10280 Devices 0 -10 Reverse Isolation (dB) Gain (dB) XB1004 Vd1,2=4.0 V Id1=45 mA, Id2=45 mA ~10210 Devices 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0 32.0 -20 -30 -40 -50 -60 -70 -80 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0 32.0 Frequency (GHz) Frequency (GHz) Max Median Mean Max -3sigma Mean -3sigma XB1004 Vd1,2=4.0 V Id1=45 mA, Id2=45 mA ~10210 Devices XB1004 Vd1,2=4.0 V Id1=45 mA, Id2=45 mA ~10280 Devices 0 0 Output Return Loss (dB) Input Return Loss (dB) Median -5 -10 -15 -20 -25 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0 32.0 -5 -10 -15 -20 -25 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0 32.0 Frequency (GHz) Frequency (GHz) Max Median Mean +3sigma -3sigma Median Mean -3sigma XB1004 Vd1,2=4.0 V Id1=45 mA, Id2=45 mA ~3460 Devices 4.0 Noise Figure (dB) 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 Frequency (GHz) Max Median Mean -3sigma Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Page 3 of 10 Characteristic Data and Specifications are subject to change without notice. ©2005 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 16.0-30.0 GHz GaAs MMIC Buffer Amplifier B1004 April 2005 - Rev 01-Apr-05 Buffer Amplifier Measurements (cont.) XB1004 Vd1,2=4.0 V Id1=90 mA, Id2=90 mA ~3200 Devices 23 -10 Reverse Isolation (dB) 0 22 21 Gain (dB) XB1004 Vd1,2=4.0 V Id1=90 mA, Id2=90 mA ~3200 Devices 24 20 19 18 17 16 -20 -30 -40 -50 -60 -70 -80 15 14 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0 32.0 -90 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0 32.0 Frequency (GHz) Max Median Mean Frequency (GHz) -3sigma Max 0 -2 -2 -4 -6 -8 -10 -12 -14 -16 Mean -3sigma XB1004 Vd1,2=4.0 V Id1=90 mA, Id2=90 mA ~3200 Devices 0 Output Return Loss (dB) Input Return Loss (dB) XB1004 Vd1,2=4.0 V Id1=90 mA, Id2=90 mA ~3200 Devices Median -4 -6 -8 -10 -12 -14 -16 -18 -18 -20 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0 32.0 -20 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0 32.0 Frequency (GHz) Frequency (GHz) Max Median Mean -3sigma Max Median Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Mean -3sigma Page 4 of 10 Characteristic Data and Specifications are subject to change without notice. ©2005 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 16.0-30.0 GHz GaAs MMIC Buffer Amplifier B1004 April 2005 - Rev 01-Apr-05 Buffer Amplifier Measurements at Power Bias 2_0279: Pout vs. freq at -10, -3 and 7dBm 24 22 22 20 20 18 18 16 16 Pout (dBm) Pout (dBm) 2_0279_R2C2: Pout vs. freq_R2C2 24 14 12 14 12 10 10 8 8 6 6 4 4 2 2 0 0 16 18 20 22 24 26 28 30 32 34 36 freq (GHz) 16 18 20 22 24 26 28 30 32 34 freq (GHz) 2_0279_R3C3: OP1dB OP1dB 22 OP1dB (dBm) 20 18 16 14 12 10 18 20 22 24 26 28 30 32 34 Freq (GHz) Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Page 5 of 10 Characteristic Data and Specifications are subject to change without notice. ©2005 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 36 16.0-30.0 GHz GaAs MMIC Buffer Amplifier B1004 April 2005 - Rev 01-Apr-05 S-Parameters Typical S-Parameter Data for XB1004 Vd=4 V Id1=45 mA Id2=45 mA Frequency (GHz) 14.00 14.25 14.50 14.75 15.00 15.25 15.50 15.75 16.00 16.25 16.50 16.75 17.00 17.25 17.50 17.75 18.00 18.25 18.50 18.75 19.00 19.25 19.50 19.75 20.00 20.25 20.50 20.75 21.00 21.25 21.50 21.75 22.00 22.25 22.50 22.75 23.00 23.25 23.50 23.75 24.00 24.25 24.50 24.75 25.00 25.25 25.50 25.75 26.00 26.25 26.50 26.75 27.00 27.25 27.50 27.75 28.00 28.25 28.50 28.75 29.00 29.25 29.50 29.75 30.00 30.25 30.50 30.75 31.00 31.25 31.50 31.75 32.00 S11 Mag dB -4.488006386 -4.780466353 -5.090069626 -5.515642302 -5.908319039 -6.36492729 -6.835321917 -7.443645645 -7.954014568 -8.613494027 -9.351339718 -9.938284456 -10.72781907 -11.45757287 -12.10581429 -12.78314466 -13.40563631 -13.76917019 -14.12698 -14.48203359 -14.55165735 -14.63942028 -14.68157629 -14.74099805 -14.51000349 -14.62534716 -14.70616526 -14.90553527 -15.02357419 -15.05015808 -15.10655145 -14.98337453 -15.0534118 -15.18069607 -15.12574012 -15.08626965 -14.99602393 -14.8537183 -15.36344283 -15.0946598 -15.39735257 -15.13095054 -15.1744339 -14.87939547 -14.90477717 -14.67738998 -14.38830456 -14.13837685 -13.68285147 -13.22837385 -12.44232727 -12.1231902 -11.51541544 -10.95899259 -10.17930299 -9.486668382 -8.86384684 -8.082733695 -7.684183764 -7.134292488 -6.52197965 -5.998240777 -5.644587238 -5.279553438 -4.941451463 -4.825257403 -4.615118041 -4.44721087 -4.355991672 -4.322415263 -4.206464968 -4.173257655 -4.143739107 S11 Phase Ango 160.3477 156.7746 153.2923 149.3398 146.0351 142.3947 139.2067 135.8314 133.451 130.5553 128.5114 126.7418 125.6761 125.1995 125.4995 126.4037 128.1031 130.3096 132.3081 134.6221 136.2222 136.5078 137.3111 139.6776 138.8338 138.1341 136.6651 136.5904 135.813 135.6739 134.7054 135.7253 132.4365 130.7094 129.0565 128.2232 124.8725 120.3659 116.3281 115.1304 112.4639 109.5295 106.0131 100.8113 96.33096 91.03966 87.22176 81.97481 75.85893 70.50666 62.4766 55.19888 48.33369 42.02633 33.51711 24.41982 18.61195 9.647546 1.679874 -5.842427 -12.848 -22.03921 -28.6075 -37.44137 -44.89988 -51.70079 -58.4916 -63.4305 -69.75317 -74.47208 -79.78357 -83.59286 -88.26109 S12 Mag dB -65.20547853 -65.04914525 -66.83487195 -62.82813364 -62.15152842 -63.79403343 -61.55571655 -61.61834811 -62.87801498 -60.97586254 -59.08234194 -58.07570032 -57.10236855 -55.63348472 -55.25927565 -53.62911008 -53.49785092 -53.59193789 -53.18089883 -53.36091684 -52.97969443 -53.42822181 -53.1769237 -52.39693469 -51.49852234 -51.66603657 -51.38333793 -52.71399942 -52.10524654 -52.02010887 -52.22623499 -51.58492383 -50.65432343 -51.01217322 -50.0589988 -51.74807807 -51.13032313 -50.17404016 -49.045145 -49.85819483 -49.72499596 -50.13093024 -50.20715943 -50.50249522 -49.57066959 -48.74758629 -49.67421973 -48.96714338 -49.1836183 -50.06582294 -50.54932781 -49.5366484 -49.01919565 -49.27235222 -49.83416656 -50.21434656 -49.92261375 -52.65291204 -52.09575618 -50.43673429 -48.94679421 -49.27311546 -48.72771039 -49.74170856 -49.85115212 -51.02755692 -51.29842096 -51.03586887 -50.4634257 -51.17707418 -49.76725044 -49.13513642 -49.28087624 S12 Phase Ango 97.9597 130.745 144.4173 145.9903 140.1351 139.2024 135.3048 136.4185 130.6166 155.2967 149.3536 153.9659 145.1132 146.4742 142.45 137.6782 126.705 118.0486 118.702 115.3193 109.4043 101.9631 103.6469 104.5834 95.15817 96.65334 82.06539 82.86057 79.37607 76.92526 71.78536 80.65435 70.29443 64.31312 56.86007 55.47022 53.64964 57.88192 43.18889 43.34335 32.64002 30.30852 25.31852 26.3597 21.51729 21.70694 8.14969 5.585327 -3.681355 -14.11971 -23.09788 -9.982013 -31.26795 -36.02533 -45.60722 -51.82261 -63.95271 -77.20475 -69.46488 -76.09734 -89.84153 -105.3236 -119.9739 -140.7835 -150.2209 -151.5981 -154.4575 -157.2381 157.4598 159.6716 156.0792 141.7404 132.9657 S21 Mag dB 15.91141774 16.26308988 16.58581284 16.96448878 17.27640243 17.6306096 17.89655959 18.23731044 18.53392439 18.79434566 19.06419509 19.2955573 19.55954352 19.73877049 19.96235376 20.12122686 20.31749415 20.45549686 20.58039147 20.75502996 20.80511699 20.86890808 20.93192687 20.97333211 20.98201169 20.98524967 20.99616315 20.96910204 20.89622002 20.91884446 20.84428402 20.84540286 20.79089267 20.77090997 20.8603409 20.81792882 20.80876731 20.8115805 20.73456942 20.81239514 20.75503497 20.83643776 20.83040005 20.89856238 20.90054564 20.89195512 20.99917398 21.04299246 21.12871511 21.257216 21.34178196 21.34760323 21.48924461 21.51576377 21.56439576 21.54985487 21.58096768 21.5193103 21.34695902 21.24451683 21.06557481 20.72026144 20.41443603 19.94991228 19.44888726 18.89354455 18.30012391 17.75344043 17.08638984 16.58920074 15.83669567 15.33144978 14.71038311 S21 Phase Ango 80.4131 72.75384 66.05664 58.3271 51.4296 43.16068 36.43289 27.96522 21.13839 12.62619 4.264312 -2.923985 -11.07268 -18.24617 -27.11272 -33.96728 -42.63926 -50.03904 -58.52836 -67.11792 -74.15998 -82.84879 -89.86997 -97.89622 -105.3744 -113.0653 -120.2752 -128.1374 -135.913 -142.6171 -150.0642 -156.16 -163.8192 -169.6259 -170.5688 172.9285 168.9904 161.4748 155.6715 148.4648 142.5701 135.1379 129.3736 121.75 115.4541 108.3276 101.1408 94.48246 87.0444 80.46708 71.82767 65.34277 56.8985 49.67164 40.38253 31.15906 23.28123 13.39679 5.231442 -4.82478 -13.77886 -23.99692 -32.80532 -42.83006 -52.45927 -60.66542 -69.80401 -76.78794 -85.54248 -92.28 -100.0134 -106.2723 -112.2931 S22 Mag dB -7.961292105 -8.307793633 -8.516462366 -8.817693057 -9.116250938 -9.490746359 -9.758978333 -10.0850734 -10.44926621 -10.70325156 -11.23343585 -11.49338288 -11.84807057 -12.26263506 -12.70872047 -13.08797618 -13.38602103 -13.55092416 -13.66587745 -13.7915767 -13.84992904 -13.7461338 -13.75692934 -14.05814122 -13.81447312 -13.90279702 -13.77821296 -13.92470348 -14.0619026 -14.0289345 -13.99375336 -13.93191213 -13.80462928 -13.66911466 -13.58380875 -13.7221915 -13.53672031 -13.32979145 -13.35741826 -13.40357247 -13.4656704 -13.55071132 -13.65003675 -13.52521517 -13.5387876 -13.57528524 -13.72233378 -13.85032041 -14.05533839 -14.16774214 -14.09760141 -14.12675521 -14.44884399 -14.46870091 -14.03623103 -14.18198677 -13.83955787 -13.31467582 -13.13934105 -12.71549435 -12.1811325 -11.4541009 -10.89193703 -10.21068599 -9.575210602 -9.177802992 -8.690316302 -8.348029064 -7.999071087 -7.750419231 -7.49742569 -7.376597896 -7.215566664 Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com S22 Phase Ango 156.364 81.76258 17.58182 -60.40213 -125.5226 152.1885 91.87538 15.17566 -49.12296 -126.3388 150.939 89.83047 15.57915 -47.66284 -123.7843 167.1598 94.69427 35.52287 -40.1016 -115.0743 44.88443 102.1477 41.94405 -33.67156 -96.83292 -168.5283 120.4647 44.1559 -31.24287 -93.15093 -166.7917 126.4174 50.23223 -14.48867 -91.78304 -152.1783 126.3781 51.83643 -14.95574 -90.19309 -152.0927 126.8156 62.67419 -12.75818 -76.76747 -150.5746 127.6319 64.45851 -10.21604 -72.27026 -142.9784 142.8106 72.33661 12.9942 -61.09192 -136.7268 155.505 84.48412 24.31771 -46.76101 -110.1438 164.9588 104.8088 29.38953 -48.08296 -114.5268 159.8694 96.70776 20.62207 -45.304 -124.8377 163.0723 87.67538 Page 6 of 10 Characteristic Data and Specifications are subject to change without notice. ©2005 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 16.0-30.0 GHz GaAs MMIC Buffer Amplifier April 2005 - Rev 01-Apr-05 Mechanical Drawing 1.290 (0.051) 1.892 (0.074) 1.500 (0.059) 2 3 0.798 (0.031) B1004 1 0.798 (0.031) 4 10 0.0 9 8 6 7 5 1.760 0.958 1.359 2.330 (0.069) (0.038) (0.054) 1.158 1.560 1.958 (0.092) (0.046) (0.061) (0.077) 0.0 (Note: Engineering designator is 22LN3UA0279) Units: millimeters (inches) Bond pad dimensions are shown to center of bond pad. Thickness: 0.110 +/- 0.010 (0.0043 +/- 0.0004), Backside is ground, Bond Pad/Backside Metallization: Gold All Bond Pads are 0.100 x 0.100 (0.004 x 0.004). Bond pad centers are approximately 0.109 (0.004) from the edge of the chip. Dicing tolerance: +/- 0.005 (+/- 0.0002). Approximate weight: 2.165 mg. Bond Pad #1 (RF In) Bond Pad #2 (Vd1) Bond Pad #3 (Vd2) Bond Pad #4 (RF Out) Bond Pad #5 (Vg2c) Bond Pad #6 (Vg2b) Vd1,2 Bias Arrangement Bond Pad #7 (Vg2a) Bond Pad #8 (Vg1c) Bond Pad #9 (Vg1b) Bond Pad #10 (Vg1a) Bypass Capacitors - See App Note [2] Vd1,2 2 RF In 3 4 1 10 9 8 7 6 RF Out RF In RF Out 5 Vg1,2 Vg1c, Vg2c Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Page 7 of 10 Characteristic Data and Specifications are subject to change without notice. ©2005 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 16.0-30.0 GHz GaAs MMIC Buffer Amplifier B1004 April 2005 - Rev 01-Apr-05 App Note [1] Biasing - As shown in the bonding diagram, this device can be operated with all three stages in parallel, and can be biased for low noise performance or high power performance. Low noise bias is nominally Vd=4V, Id=90mA. More controlled performance will be obtained by separately biasing Vd1 and Vd2 each at 4.0V, 45mA. Power bias may be as high as Vd=6.0V, Id=180mA with all stages in parallel, or most controlled performance will be obtained by separately biasing Vd1 and Vd2 each at 6.0V, 90mA. It is also recommended to use active biasing to keep the currents constant as the RF power and temperature vary; this gives the most reproducible results. Depending on the supply voltage available and the power dissipation constraints, the bias circuit may be a single transistor or a low power operational amplifier, with a low value resistor in series with the drain supply used to sense the current. The gate of the pHEMT is controlled to maintain correct drain current and thus drain voltage. The typical gate voltage needed to do this is -0.3V. Typically the gate is protected with Silicon diodes to limit the applied voltage. Also, make sure to sequence the applied voltage to ensure negative gate bias is available before applying the positive drain supply. App Note [2] Bias Arrangement For Parallel Stage Bias (Recommended for general applications) -- The same as Individual Stage Bias but all the drain or gate pad DC bypass capacitors (~100-200 pf ) can be combined. The suggested configuration is to connect Vd1,2 and Vg1c,2c. Additional DC bypass capacitance (~0.01 uF) is also recommended to all DC or combination (if gate or drains are tied together) of DC bias pads. For Individual Stage Bias (Low Input Drive applications only) -- Each DC pad (Vd1,2 and Vg1a,2a,2b) needs to have DC bypass capacitance (~100-200 pf ) as close to the device as possible. Additional DC bypass capacitance (~0.01 uF) is also recommended. For Individual Stage Bias (High Input Drive applications only) -- Each DC pad (Vd1,2 and Vg1c,2c) needs to have DC bypass capacitance (~100-200 pf ) as close to the device as possible. Additional DC bypass capacitance (~0.01 uF) is also recommended. MTTF Tables These numbers were calculated based on accelerated life test information and thermal model analysis received from the fabricating foundry. Backplate Temperature Channel Temperature Rth MTTF Hours FITs 55 deg Celsius 83.4 deg Celsius 78.8° C/W 5.36E+10 1.87E-02 75 deg Celsius 105.5 deg Celsius 84.7° C/W 3.52E+09 2.84E-01 95 deg Celsius 127.4 deg Celsius 90.0° C/W 3.20E+08 3.13E+00 Bias Conditions: Vd1=Vd2=4.0V, Id1=45 mA, Id2=45 mA Backplate Temperature Channel Temperature Rth MTTF Hours FITs 55 deg Celsius 108.3 deg Celsius 76.1° C/W 2.56E+09 3.91E-01 75 deg Celsius 132.1 deg Celsius 81.5° C/W 1.99E+08 5.04E+00 95 deg Celsius 155.5 deg Celsius 86.4° C/W 2.12E+07 4.72E+01 Bias Conditions: Vd1=Vd2=5.0V, Id1=70 mA, Id2=70 mA Backplate Temperature Channel Temperature Rth MTTF Hours FITs 55 deg Celsius 138.1 deg Celsius 77.0° C/W 1.08E+08 9.22E+00 75 deg Celsius 163.7 deg Celsius 82.1° C/W 1.02E+07 9.82E+01 95 deg Celsius 188.8 deg Celsius 86.8° C/W 1.29E+06 7.73E+02 Bias Conditions: Vd1=Vd2=6.0V, Id1=90 mA, Id2=90 mA Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Page 8 of 10 Characteristic Data and Specifications are subject to change without notice. ©2005 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 16.0-30.0 GHz GaAs MMIC Buffer Amplifier B1004 April 2005 - Rev 01-Apr-05 Device Schematic Vd1 Vd2 R=35.0 R=35.0 R=5.0 R=20.0 R=12.5 R=5.0 RFin RFout R=20.0 R=20.0 R=30.0 R=20.0 R=30.0 R=30.0 R=500.0 Vg2b R=10.0 R=500.0 R=500.0 Vg2c R=250.0 Vg1b Vg2a Vg1a Vg1c Typical Application XB1004 XU1000 XP1000 WG Sideband Reject IF IN 2 GHz LO(+12dBm) 15.7-17.7 GHz (USB Operation) 19.7-21.7 GHz (LSB Operation) RF Out 17.7-19.7 GHz On-Chip Temp Comp Detector Mimix Broadband MMIC-based 17.0-27.0 GHz Transmitter Block Diagram (Changing LO and IF frequencies as required allows design to operate as high as 27 GHz) Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Page 9 of 10 Characteristic Data and Specifications are subject to change without notice. ©2005 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws. 16.0-30.0 GHz GaAs MMIC Buffer Amplifier B1004 April 2005 - Rev 01-Apr-05 Handling and Assembly Information CAUTION! - Mimix Broadband MMIC Products contain gallium arsenide (GaAs) which can be hazardous to the human body and the environment. For safety, observe the following procedures: Do not ingest. Do not alter the form of this product into a gas, powder, or liquid through burning, crushing, or chemical processing as these by-products are dangerous to the human body if inhaled, ingested, or swallowed. Observe government laws and company regulations when discarding this product. This product must be discarded in accordance with methods specified by applicable hazardous waste procedures. Life Support Policy - Mimix Broadband's products are not authorized for use as critical components in life support devices or systems without the express written approval of the President and General Counsel of Mimix Broadband. As used herein: (1) Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. (2) A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ESD - Gallium Arsenide (GaAs) devices are susceptible to electrostatic and mechanical damage. Die are supplied in antistatic containers, which should be opened in cleanroom conditions at an appropriately grounded antistatic workstation. Devices need careful handling using correctly designed collets, vacuum pickups or, with care, sharp tweezers. Die Attachment - GaAs Products from Mimix Broadband are 0.100 mm (0.004") thick and have vias through to the backside to enable grounding to the circuit. Microstrip substrates should be brought as close to the die as possible. The mounting surface should be clean and flat. If using conductive epoxy, recommended epoxies are Ablestick 84-1LMI or 84-1LMIT cured in a nitrogen atmosphere per manufacturer's cure schedule. Apply epoxy sparingly to avoid getting any on to the top surface of the die. An epoxy fillet should be visible around the total die periphery. If eutectic mounting is preferred, then a fluxless gold-tin (AuSn) preform, approximately 0.001 2 thick, placed between the die and the attachment surface should be used. A die bonder that utilizes a heated collet and provides scrubbing action to ensure total wetting to prevent void formation in a nitrogen atmosphere is recommended. The gold-tin eutectic (80% Au 20% Sn) has a melting point of approximately 280 C (Note: Gold Germanium should be avoided). The work station temperature should be 310 C +- 10 C. Exposure to these extreme temperatures should be kept to minimum. The collet should be heated, and the die pre-heated to avoid excessive thermal shock. Avoidance of air bridges and force impact are critical during placement. Wire Bonding - Windows in the surface passivation above the bond pads are provided to allow wire bonding to the die's gold bond pads. The recommended wire bonding procedure uses 0.076 mm x 0.013 mm (0.003" x 0.0005") 99.99% pure gold ribbon with 0.5-2% elongation to minimize RF port bond inductance. Gold 0.025 mm (0.001") diameter wedge or ball bonds are acceptable for DC Bias connections. Aluminum wire should be avoided. Thermo-compression bonding is recommended though thermosonic bonding may be used providing the ultrasonic content of the bond is minimized. Bond force, time and ultrasonics are all critical parameters. Bonds should be made from the bond pads on the die to the package or substrate. All bonds should be as short as possible. Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Page 10 of 10 Characteristic Data and Specifications are subject to change without notice. ©2005 Mimix Broadband, Inc. Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept their obligation to be compliant with U.S. Export Laws.