HMC-SDD112 v02.0309 4 GaAs PIN MMIC SPDT SWITCH 55 - 86 GHz Typical Applications Features This HMC-SDD112 is ideal for: Low Insertion Loss: 2 dB • FCC E-Band Communication Systems High Isolation: 30 dB • Short-Haul / High Capacity Radios DC Blocked RF I/Os • Automotive Radar Integrated DC Bias Circuitry • Test & Measurement Equipment Die Size: 2.01 x 0.975 x 0.1 mm • SATCOM SWITCHES - CHIP • Sensors General Description Functional Diagram The HMC-SDD112 is a monolithic, GaAs PIN diode based Single Pole Double Throw (SPDT) MMIC Switch which exhibits low insertion loss and high isolation. This all-shunt MMIC SPDT features on-chip DC blocks and DC bias voltage decoupling circuitry. All bond pads and the die backside are Ti/Au metallized and the PIN diode devices are fully passivated for reliable operation. The HMC-SDD112 GaAs PIN SPDT is compatible with conventional die attach methods, as well as thermocompression and thermosonic wirebonding, making it ideal for MCM and hybrid microcircuit applications. All data shown herein is measured with the chip in a 50 Ohm environment and contacted with RF probes. Electrical Specifi cations*, TA = +25 °C, with -5/+5V Control, 50 Ohm System Parameter Min. Frequency Range Typ. Insertion Loss 2 Isolation Max. 55 - 86 25 GHz 3 dB 30 dB 12 dB Current (+5 V) ON State 22 mA Current (-5 V) OFF State -63 nA Return Loss ON State * Unless otherwise indicated, all measurements are from probed die 4 - 44 Units For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC-SDD112 v02.0309 GaAs PIN MMIC SPDT SWITCH 55 - 86 GHz “On” Insertion Loss vs. Freq. CTLA= -5V, CTLB= 5V for RFOUT1 to be ON “Off” Isolation vs. Freq. CTLA= +5V, CTLB= -5V for RFOUT1 to be OFF 0 0 -1 -10 ISOLATION (dB) INSERTION LOSS (dB) -5 -2 -3 -15 -20 -25 4 -30 -35 -4 -45 55 60 65 70 75 80 85 90 55 60 65 70 75 80 85 90 FREQUENCY (GHz) “On” Input Return Loss vs. Freq. CTLA= -5V, CTLB= 5V for RFOUT1 to be ON “On” Output Return Loss vs. Freq. CTLA= -5V, CTLB= 5V for RFOUT1 to be ON 0 0 -5 -5 RETURN LOSS (dB) RETURN LOSS (dB) FREQUENCY (GHz) -10 -15 -20 -10 SWITCHES - CHIP -40 -5 -15 -20 -25 -25 55 60 65 70 75 FREQUENCY (GHz) 80 85 90 55 60 65 70 75 80 85 90 FREQUENCY (GHz) Note 1: Measured Performance Characteristics (Typical Performance at 25°C) Test data is taken with probes on RFIN and RFOUT1 with RFOUT2 left open. For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 4 - 45 HMC-SDD112 v02.0309 GaAs PIN MMIC SPDT SWITCH 55 - 86 GHz Absolute Maximum Ratings SWITCHES - CHIP 4 Bias Voltage Range -5.5 to 5.5 Vdc Storage Temperature -65 to +150 °C Operating Temperature -55 to +85 °C Bias Current (ON State) 30 mA Control Voltages ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS Truth Table State Bias Condition Low -5 V @ 63 nA typical CTLA CTLB RFIN to RFOUT1 RFIN to RFOUT2 High +5 V @ 22 mA typical Low (-5V) High (+5V) High (+5V) Low (-5V) On Off Off On Control Input Signal Path State Outline Drawing Die Packaging Information [1] NOTES: 1. ALL DIMENSIONS ARE IN INCHES [MM]. 2. TYPICAL BOND PAD IS .004” SQUARE. Standard Alternate GP-5 (Gel Pack) [2] [1] Refer to the “Packaging Information” section for die packaging dimensions. [2] For alternate packaging information contact Hittite Microwave Corporation. 4 - 46 3. BACKSIDE METALLIZATION: GOLD. 4. BACKSIDE METAL IS GROUND. 5. BOND PAD METALLIZATION: GOLD. 6. CONNECTION NOT REQUIRED FOR UNLABELED BOND PADS. 7. OVERALL DIE SIZE ±.002” For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC-SDD112 v02.0309 GaAs PIN MMIC SPDT SWITCH 55 - 86 GHz Pad Descriptions Function Pin Description 1 RFOUT1 This pin is DC blocked and matched to 50 Ohms. 2,3 CTLA, CTLB See Truth Table and Control Voltage Table 4 RFOUT2 This pin is DC blocked and matched to 50 Ohms. 5 RFIN This pin is DC blocked and matched to 50 Ohms. Die Bottom GND Die bottom must be connected to RF/DC ground. Interface Schematic For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 4 SWITCHES - CHIP Pad Number 4 - 47 HMC-SDD112 v02.0309 GaAs PIN MMIC SPDT SWITCH 55 - 86 GHz Assembly Diagram SWITCHES - CHIP 4 Note 1: Bypass caps should be 100 pF (approximately) ceramic (single-layer) placed no farther than 30 mils from the switch. Note 2: Best performance obtained from use of <6 mil (long) by 1.5 by 0.5 mil ribbons on input and output. 4 - 48 For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com HMC-SDD112 v02.0309 GaAs PIN MMIC SPDT SWITCH 55 - 86 GHz Mounting & Bonding Techniques for Millimeterwave GaAs MMICs 50 Ohm Microstrip transmission lines on 0.127mm (5 mil) thick alumina thin film substrates are recommended for bringing RF to and from the chip (Figure 1). If 0.254mm (10 mil) thick alumina thin film substrates must be used, the die should be raised 0.150mm (6 mils) so that the surface of the die is coplanar with the surface of the substrate. One way to accomplish this is to attach the 0.102mm (4 mil) thick die to a 0.150mm (6 mil) thick molybdenum heat spreader (moly-tab) which is then attached to the ground plane (Figure 2). 0.102mm (0.004”) Thick GaAs MMIC Wire Bond 0.076mm (0.003”) RF Ground Plane Microstrip substrates should brought as close to the die as possible in order to minimize bond wire length. Typical die-to-substrate spacing is 0.076mm to 0.152 mm (3 to 6 mils). 0.127mm (0.005”) Thick Alumina Thin Film Substrate Figure 1. Handling Precautions Follow these precautions to avoid permanent damage. Storage: All bare die are placed in either Waffle or Gel based ESD protective containers, and then sealed in an ESD protective bag for shipment. Once the sealed ESD protective bag has been opened, all die should be stored in a dry nitrogen environment. Cleanliness: Handle the chips in a clean environment. DO NOT attempt to clean the chip using liquid cleaning systems. Static Sensitivity: strikes. 0.102mm (0.004”) Thick GaAs MMIC Wire Bond 0.076mm (0.003”) RF Ground Plane Follow ESD precautions to protect against ESD Transients: Suppress instrument and bias supply transients while bias is applied. Use shielded signal and bias cables to minimize inductive pickup. 4 SWITCHES - CHIP The die should be attached directly to the ground plane eutectically or with conductive epoxy (see HMC general Handling, Mounting, Bonding Note). 0.150mm (0.005”) Thick Moly Tab 0.254mm (0.010”) Thick Alumina Thin Film Substrate Figure 2. General Handling: Handle the chip along the edges with a vacuum collet or with a sharp pair of bent tweezers. The surface of the chip has fragile air bridges and should not be touched with vacuum collet, tweezers, or fingers. Mounting The chip is back-metallized and can be die mounted with AuSn eutectic preforms or with electrically conductive epoxy. The mounting surface should be clean and flat. Eutectic Die Attach: A 80/20 gold tin preform is recommended with a work surface temperature of 255 °C and a tool temperature of 265 °C. When hot 90/10 nitrogen/hydrogen gas is applied, tool tip temperature should be 290 °C. DO NOT expose the chip to a temperature greater than 320 °C for more than 20 seconds. No more than 3 seconds of scrubbing should be required for attachment. Epoxy Die Attach: Apply a minimum amount of epoxy to the mounting surface so that a thin epoxy fillet is observed around the perimeter of the chip once it is placed into position. Cure epoxy per the manufacturer’s schedule. Wire Bonding Ball or wedge bond with 0.025mm (1 mil) diameter pure gold wire. Thermosonic wirebonding with a nominal stage temperature of 150 °C and a ball bonding force of 40 to 50 grams or wedge bonding force of 18 to 22 grams is recommended. Use the minimum level of ultrasonic energy to achieve reliable wirebonds. Wirebonds should be started on the chip and terminated on the package or substrate. All bonds should be as short as possible <0.31mm (12 mils). For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com 4 - 49