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| 27.0-32.0 GHz GaAs MMIC Power Amplifier September 2005 - Rev 01-Sep-05 30SPA0553 Chip Device Layout Features Ka-Band 2W Power Amplifier 22.0 dB Small Signal Gain +33.0 dBm Saturated Output Power +40.0 dBm Output Third Order Intercept (OIP3) 100% On-Wafer RF, DC and Output Power Testing 100% Visual Inspection to MIL-STD-883 Method 2010 General Description Mimix Broadband's three stage 27.0-32.0 GHz GaAs MMIC power amplifier has a small signal gain of 22.0 dB with +33 dBm saturated output power. This MMIC uses Mimix Broadband's 0.15 m 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-toPoint Radio, LMDS, SATCOM and VSAT applications. Electrical Characteristics (Ambient Temperature T = 25 oC) Parameter Frequency Range (f ) Input Return Loss (S11) Output Return Loss (S22) Small Signal Gain (S21) Gain Flatness (S21) Reverse Isolation (S12) Saturated Output Power (Psat) Drain Bias Voltage (Vd1,2,3) Gate Bias Voltage (Vg1,2,3) Supply Current (Id1) (Vd=5.0V, Vg=-0.7V Typical) Supply Current (Id2) (Vd=5.0V, Vg=-0.7V Typical) Supply Current (Id3) (Vd=5.0V, Vg=-0.7V Typical) Units GHz dB dB dB dB dB dBm VDC VDC mA mA mA Min. 27.0 -1.2 Typ. 10.0 15.0 22.0 +/-1.0 50.0 +33.0 +5.0 -0.9 100 250 550 Max. 32.0 +6.0 0.0 150 350 750 Pr e- pr od Supply Voltage (Vd) Supply Current (Id1,2,3) Gate Bias Voltage (Vg) Input Power (Pin) Storage Temperature (Tstg) Operating Temperature (Ta) Channel Temperature (Tch) uc Absolute Maximum Ratings (1) Channel temperature affects a device's MTTF. It is recommended to keep channel temperature as low as possible for maximum life. Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Characteristic Data and Specifications are subject to change without notice. (c)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. tio n +6.5 VDC 165,415,790 mA +0.3 VDC TBD -65 to +165 OC -55 to MTTF Table1 MTTF Table 1 Page 1 of 5 27.0-32.0 GHz GaAs MMIC Power Amplifier September 2005 - Rev 01-Sep-05 30SPA0553 35 34 33 32 31 Vd = 5.0 V Vd = 6.0 V Vd = 5.5 V Power Amplifier Measurements 26 24 22 20 18 16 14 12 10 8 6 4 2 0 -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 25 26 27 28 29 30 31 Frequency (GHz) 32 33 34 35 Output Power (dBm) 30 29 28 27 26 25 24 23 22 21 20 26 27 28 29 tio n 30 31 32 S-parameters 33 800 Id1 at 5 .0 V Id1 at 5.5 V Id2 at 5.5 V Id3 at 5.5 V Id1 a t 6.0 V Id2 a t 6.0 V Id3 a t 6.0 V 700 Drain current Id1, Id2 and Id3 (mA ) Id2 at 5 .0 V Id3 at 5 .0 V 600 500 400 300 200 100 0 20 pr 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 0 PA E at 5. 0 V PA E at 5. 5 V PA E at 6. 0 V Gai n at 5.0 V Gai n at 5.5 V Gai n at 6.0 V od PAE ( %) a nd Ga in (dB) 20 21 22 uc Ga in PAE Frequency (G Hz) 23 24 25 26 27 28 29 30 31 32 33 34 21 22 23 24 25 26 27 28 29 30 31 32 33 34 Output Power (dBm ) Pr Average O IP3 (dB m) e42 41 40 39 38 28 G Hz 29 G Hz Output Power (dBm) 37 30 G Hz 31 G Hz 36 35 12 13 14 32 G Hz 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 Output Power per T one (dBm) Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Page 2 of 5 Characteristic Data and Specifications are subject to change without notice. (c)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. 27.0-32.0 GHz GaAs MMIC Power Amplifier September 2005 - Rev 01-Sep-05 30SPA0553 0.82 (0.032) 1.22 (0.048) 1.62 (0.064) 2.42 (0.095) 2.82 (0.111) 3.22 (0.127) Mechanical Drawing 2.00 (0.079) 2 3 4 5 6 7 1.00 (0.039) 1 14 0.0 0.0 0.82 (0.032) 13 12 11 uc 10 2.82 (0.111) 9 (Note: Engineering designator is 30SPA0557) Bond Pad #1 (RF In) Bond Pad #2 (Vg1A) Bond Pad #3 (Vd1A) Bond Pad #4 (Vg2A) Bond Pad #5 (Vd2A) Bond Pad #6 (Vg3A) Bond Pad #7 (Vd3A) Bond Pad #8 (RF Out) pr 6 7 10 9 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 DC Bond Pads are 0.100 x 0.100 (0.004 x 0.004). All RF Bond Pads are 0.100 x 0.200 (0.004 x 0.008) Bond pad centers are approximately 0.109 (0.004) from the edge of the chip. Dicing tolerance: +/- 0.005 (+/- 0.0002). Approximate weight: 4.588 mg. Bond Pad #9 (Vd3B) Bond Pad #10 (Vg3B) Bond Pad #11 Vd2B) Bond Pad #12 (Vg2B) Bond Pad #13 (Vd1B) Bond Pad #14 (Vg1B) e- Bias Arrangement Vg1 2 3 od Vg3 8 1.22 (0.048) 1.62 (0.064) 2.42 (0.095) 3.22 (0.127) Bypass Capacitors - See App Note [2] Vg2 4 5 1 RF In Pr RF Out 14 13 12 11 Vd1 Vd2 Vd3 Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Characteristic Data and Specifications are subject to change without notice. (c)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. tio n 8 3.70 (0.146) 1.00 (0.039) Page 3 of 5 27.0-32.0 GHz GaAs MMIC Power Amplifier September 2005 - Rev 01-Sep-05 30SPA0553 App Note [1] Biasing - It is recommended to separately bias each amplifier stage Vd1 through Vd3 at Vd(1,2,3)=5.0V with Id1=100mA, Id2=250mA, 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. 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. All DC pads have been tied together on chip and can be biased from either side. For Individual Stage Bias (Recommended for saturated applications) -- Each DC pad (Vd1,2,3 and Vg1,2,3) 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. All DC pads have been tied together on chip and can be biased from either side. MTTF Table (TBD) These numbers were calculated based on accelerated life test information and thermal model analysis received from the fabricating foundry. od Rth C/W C/W C/W Backplate Temperature 55 deg Celsius 75 deg Celsius 95 deg Celsius Channel Temperature deg Celsius deg Celsius deg Celsius MTTF Hours uc E+ E+ E+ FITs E+ E+ E+ Bias Conditions: Vd1=Vd2=Vd3=5.0V, Id1=100mA, Id2=250mA, Id3=550mA Pr e- pr Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com Characteristic Data and Specifications are subject to change without notice. (c)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. tio n and Id3=550mA. Separate biasing is recommended if the amplifier is to be used at high levels of saturation, where gate rectification will alter the effective gate control voltage. For non-critical applications it is possible to parallel all stages and adjust the common gate voltage for a total drain current Id(total)=1040 mA. 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 -0.7V. 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. Page 4 of 5 27.0-32.0 GHz GaAs MMIC Power Amplifier September 2005 - Rev 01-Sep-05 30SPA0553 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. 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 5 of 5 Characteristic Data and Specifications are subject to change without notice. (c)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. Pr 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. e- pr od 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. uc 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. tio n |
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