FHX35X/002 FHX35LG/002 Low Noise HEMT DESCRIPTION The FHX35X/002 Chip and FHX35LG/002 packaged devices are HEMT (High Electron Mobility Transistor) ones suitable for use as the front end of an optical receiver in high speed lightwave communication systems. This HEMT combines high transconductance, low gate capacitance and low leakage current; all important factors in achieving low noise preamplification. Fujitsu’s stringent Quality Assurance criteria and detailed Test Procedures assure Highest Reliabiltity Performance. FEATURES • • • • • High Transconductance Low Leakage Current Low Gate Capacitance Gold Bonding System Proven Reliability LG PACKAGE ABSOLUTE MAXIMUM RATINGS (Ambient Temperature Ta=25°C) Item Symbol Conditions Ratings Unit Drain-Source Voltage VDS 6 V Gate-Source Voltage VGS -5 V PT 290 mW Storage Temperature Tstg -65 to 175 °C Channel Temperature Tch +175 °C Thermal Resistance Rth 150 °C/W Total Power Dissipation Channel to Case ELECTRICAL CHARACTERISTICS (Ambient Temperature Ta=25°C) Min. Limits Min. Max. VDS=2V, VGS=0V 15 40 85 mA gm VDS=2V, IDS=10mA 45 60 - mS Vp VDS=2V, IDS=1mA -0.2 -1.0 -2.0 V Gate-Source Leakage Current IGSO VGS=-2V - 10 20 nA Gate-Source Capacitance CGS FHX35X/002 - 0.27 - FHX35LG/002 - 0.47 - - 0.035 - Item Symbol Conditions IDSS Transconductance Pinch-off Voltage Drain Current Gate-Drain Capacitance Edition 1.1 May 1998 CGD VDS=3V IDS=10mA VDS=3V, IDS=10mA 1 Unit pF pF FHX35X/002 FHX35LG/002 Low Noise HEMT Fig. 2 Gate-Source Capacitance vs. Drain-Source Current Fig. 1 Drain Current vs. Drain-Source Voltage VDS=3V Drain Current (mA) 40 Gate-Source Capacitance (pF) VGS=0V -0.2V 30 -0.4V 20 -0.6V 10 -0.8V 0.5 FHX35LG/002 0.4 0.3 FHX35X/002 -1.0V 0 1 2 0.2 3 Drain-source Voltage (V) Gate-Source Leakage Current (mA) Transconductance (mS) VDS=2V 60 40 20 -0.4 -0.6 30 Fig. 4 Gate-Source Leakage Current vs. Gate-Source Voltage 80 -0.2 20 Drain-Source Current (mA) Fig. 3 Transconductance vs. Gate-Source Voltage 0 10 -0.8 50 20 10 5 0 Gate-Source Voltage (V) -1.0 -2.0 -3.0 Gate-Source Voltage (V) 2 FHX35X/002 FHX35LG/002 Low Noise HEMT BONDING PROCEDURE FOR FET CHIPs Caution must be excercised to prevent static build up by proper grounding of all equipment and personnel. All operations must be performed in a clean, dust-free and dry environment. 1. Storage Condition: Store in a clean, dry nitrogen environment. 2. Die-Attach 2.1 The die-attach station must have an accurate temperature control, and an inert forming gas should be used. 2.2 Chips should be kept at room temperature, except during die-attach. 2.3 Place package or carrier on the heated stage. 2.4 Place the solder at the position where the chip will be bonded. 2.5 Lightly grasp the chip edges using tweezers and scrub the die onto the Au-Sn solder preform. The die attach conditions are: 300 to 310° for 30 to 60 seconds. The Au-Sn (80-20) solder preform volume should be about 3.2x10-3 mm3 for FHX35X/002. 3. Wire Bonding 3.1 Bonding Condition The bonder must be properly grounded. Wire bonding should be performed with a thermal compression bonder using 0.7 to 1.0 mil diameter, half hard, 3-8% elongation gold wire. 3.2 Wire Layout The wire bonding should be performed as shown in the following example. Wire Layout FHX35X/002 3 FHX35X/002 FHX35LG/002 Low Noise HEMT Case Style "LG" Metal-Ceramic Package 2 MIN. (0.079) 2 MIN. (0.079) 1.0 (0.039) 1.78±0.15 (0.07) 1 2 4 3 2 MIN. (0.079) 2 MIN. (0.079) 0.5 (0.02) 1.3 Max (0.051) 1.78±0.15 (0.07) Gold Plated Leads 0.1 (0.004) 1: Gate 2: Source 3: Drain 4: Source Unit: mm (Inches) For further information please contact: FUJITSU COMPOUND SEMICONDUCTOR, INC. 2355 Zanker Rd. San Jose, CA 95131-1138, U.S.A. Phone: (408) 232-9500 FAX: (408) 428-9111 www.fcsi.fujitsu.com FUJITSU MICROELECTRONICS EUROPE, GmbH Quantum Devices Division Network House Norreys Drive Maidenhead, Berkshire SL6 4FJ Phone:+44 (0)1628 504800 FAX:+44 (0)1628 504888 CAUTION Fujitsu Compound Semiconductor Products contain gallium arsenide (GaAs) which can be hazardous to the human body and the environment. For safety, observe the following procedures: • Do not put these products into the mouth. • 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. Fujitsu Limited reserves the right to change products and specifications without notice. The information does not convey any license under rights of Fujitsu Limited or others. © 1998 FUJITSU COMPOUND SEMICONDUCTOR, INC. Printed in U.S.A. FCSI0598M200 4