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20.0-38.0 GHz GaAs MMIC Balanced Mixer
November 2005 - Rev 21-Nov-05
26BAM0545 Features
Fundamental Balanced Mixer 8.0 dB Conversion Loss +25.0 dBm Input Third Order Intercept (IIP3) 35.0 dB LO to RF Isolation 100% On-Wafer RF Testing 100% Visual Inspection to MIL-STD-883 Method 2010 General Description Mimix Broadband's 20.0-38.0 GHz GaAs MMIC fundamental balanced mixer has been optimized for use as an up-converter. The device has a conversion loss of 8.0 dB with a +25.0 dBm input third order intercept point. IF and IF mixer inputs are provided through an external 180 degree hybrid. 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.
Chip Device Layout
Absolute Maximum Ratings
Gate Bias Voltage (Vg) Input Power (IF Pin) Storage Temperature (Tstg) Operating Temperature (Ta) +0.3 VDC +20.0 dBm -65 to +165 OC -55 to +125 OC
Electrical Characteristics (Ambient Temperature T = 25o C)
Parameter
Frequency Range (RF) Upper Side Band Frequency Range (RF) Lower Side Band Frequency Range (LO) Frequency Range (IF) RF Return Loss (S11) IF Return Loss (S22) LO Return Loss (S33) Conversion Loss (S21) LO Input Drive (PLO) Isolation LO/RF Isolation LO/IF Isolation RF/IF Input Third Order Intercept (IIP3) Gate Bias Voltage (Vg1) Units GHz GHz GHZ GHz dB dB dB dB dBm dB dB dB dBm VDC Min. 20.0 20.0 15.0 DC -1.2 Typ. 10.0 10.0 10.0 8.0 +12.0 35.0 TBD TBD +25.0 -0.5 Max. 38.0 38.0 43.0 3.0 +0.1
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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.
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Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
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20.0-38.0 GHz GaAs MMIC Balanced Mixer
November 2005 - Rev 21-Nov-05
26BAM0545 Mixer Measurements
26BAM0545: Conversion Gain (dB) vs RF Freq (GHz) IF = 1.8 GHz, IF Pin = -10 dBm, LO = +12 dBm
0
26BAM0545: LO to RF Isolation (dB) vs LO Freq (GHz) LO = +12 dBm, Vg = -0.5 V
0
-2
-5
-4
-10
Conversion Gain (dB)
-6 -8 -10 -12 RF at USB -14 -16 RF at LSB -18 -20 18 20 22 24 26 28 30 32 34 36 38 40
-15 -20 -25 -30 -35 -40 -45 -50 18 20 22 24 26 28
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30 32 34 36
30 32 34 36
LO to RF Isolation (dB)
38
40
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18 20 22 24 26
RF (GHz)
LO (GHz)
26BAM0545: IIP3 (dBm) vs. RF USB (GHz) IF = 2 GHz at -13 dBm per Tone
30 30
26BAM0545: IIP3 (dBm) vs. RF LSB (GHz) IF = 2 GHz at -13 dBm per Tone
25
25
20
15
10
LO = 9 dBm
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20
IIP3 (dBm)
IIP3 (dBm)
15
10
LO = 9 dBm LO = 12 dBm LO = 15 dBm
5
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LO = 12 dBm LO = 15 dBm
36 38
5
0 18 20 22 24 26 28 30 32 34
0 28 38 40
40
RF USB (GHz)
RF LSB (GHz)
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Mimix Broadband, Inc., 10795 Rockley Rd., Houston, Texas 77099 Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
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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.
20.0-38.0 GHz GaAs MMIC Balanced Mixer
November 2005 - Rev 21-Nov-05
26BAM0545 Mechanical Drawing
2.000 (0.079) 0.316 (0.012)
2
3
1.460 (0.057)
1
4
0.995 (0.039)
5
0.0
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0.0
0.316 (0.012)
1.250 (0.049)
(Note: Engineering designator is 26BAM0545) 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: 1.550 mg. Bond Pad #1 (RF) Bond Pad #2 (IF1)
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Bond Pad #3 (LO) Bond Pad #4 (Vg)
Bond Pad #5 (IF2)
Bias Arrangement
IF1
e3
LO
2
RF
1
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4
Vg
5
IF2
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Bypass Capacitors - See App Note [2]
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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.
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1.594 (0.063)
20.0-38.0 GHz GaAs MMIC Balanced Mixer
November 2005 - Rev 21-Nov-05
26BAM0545
App Note [1] Biasing - As shown in the bonding diagram, this device is operated by biasing Vg1 = -0.5V. Gate current consumption is < 1mA. App Note [2] Bias Arrangement - Each DC pad (Vg) 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.
LSB
USB
IF2
IF1
An alternate method of Selection of USB or LSB:
eUSB
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IF1
For Lower Side Band operation (LSB): With IF1 and IF2 connected to the direct port (0) and coupled port (180) respectively as shown in the diagram, the LSB signal will reside on the input port. The isolated port must be loaded with 50 ohms.
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LSB
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In Phase Combiner
In Phase Combiner
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For Upper Side Band operation (USB): With IF1 and IF2 connected to the direct port (0) and coupled port (180) respectively as shown in the diagram, the USB signal will reside on the isolated port. The input port must be loaded with 50 ohms.
-180
IF2
IF2
IF1
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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.
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-180
App Note [3] USB/LSB Selection - IF1 and IF2 are fed through a 180 Hybrid coupler for optimum performance. IF1 can be singly fed with IF2 terminated in 50 Ohm for ease of use. This will result in approximately 2 dB reduction in IP3 and conversion gain performance.
20.0-38.0 GHz GaAs MMIC Balanced Mixer
November 2005 - Rev 21-Nov-05
26BAM0545 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
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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.
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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.
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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.
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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.
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