HSCH-9161 Zero Bias Beamlead Detector Diode Data Sheet Description Avago's HSCH-9161 is a GaAs beamlead detector diode, fabricated using the modified barrier integrated diode (MBID) process[1]. This diode is designed for zero bias detecting applications at frequencies through 110 GHz. It can be mounted in ceramic microstrip (MIC), finline and coplanar waveguide circuits. Features * Low junction capacitance * Lower temperature coefficient than silicon Assembly Techniques Thermocompression bonding is recommended. Welding or conductive epoxy may also be used. For additional information see Application Note 979, "The Handling and Bonding of Beam Lead Devices Made Easy," or Application Note 992, "Beam Lead Attachment Methods," or Application Note 993, "Beam Lead Device Bonding to Soft Substrates." Applications At room temperature and frequencies under 10 GHz, the silicon zero bias Schottky detectors HSMS-0005 and HSMS-2850 offer comparable performance. However, the HSCH-9161 yields virtually flat detection sensitivity from 10 to 30 GHz with good performance from 30 to 110 GHz. In a wideband matched detector, in which a shunt 50 resistor is used in front of the diode, voltage sensitivity () is calculated to be 1 mV/W. Where a high-Q reactive impedance matching network is substituted for the shunt 50 resistor, values of approaching 25 mV/W can be expected. Note 1: The diode structure and process are covered by U.S. Patent No. 4,839,709 issued to Mark Zurakowski on June 13, 1989, and assigned to Avago. * Durable construction -- typical 6 gram beamlead strength * Operation to 110 GHz In applications below 10 GHz where DC bias is not available and where temperature sensitivity is a design consideration, the HSCH-9161 offers superior stability when compared to silicon zero bias Schottky diodes. Bonding and Handling For more detailed information, see Avago Application Note 999, "GaAs MMIC Assembly and Handling Guidelines." 231 (9.1) 250 (9.8) 250 (9.8) Small Signal Linear Model 0.011 pF 0.035 pF 0.3 nH 50 231 (9.1) 120 (4.7) ALL DIMENSIONS IN MICRONS. Rv = Rj + Rs Rj HSCH-9161 Absolute Maximum Ratings, TA = 25C Symbol Parameters/Conditions Units Min. Typ. Max. Top Operating Temp. Range C -65 175 Tstg Storage Temp. Range C -65 200 PB Burnout Power dBm SPICE Parameters Because of the high leakage of this diode under reverse bias, it must be modelled as an anti-parallel pair. 20 HSCH-9161 DC Specifications/Physical Properties, TA = 25C D1 Symbol Parameters and Test Conditions Units Cj Junction Capacitance Test Conditions: f = 1 GHz pF RV Video Resistance Test Conditions: Zero Bias k 2.5 Voltage Sensitivity Test Conditions: Zero Bias, 10 GHz, shunt 50 input matching resistor mV/W 0.5 Beamlead Strength grams -- Min. Typ. Max. .035 7.5 3 HSCH-9161 Typical Performance 100 16 VIDEO RESISTANCE (K) FORWARD CURRENT (mA) 14 10 1 0.1 50 0 0.2 0.4 0.8 0.6 1.0 FORWARD VOLTAGE (V) Maximum 8 6 Typical 4 0 0 10 20 30 40 50 60 70 80 Figure 2. Typical Variation of Video Resistance vs. Temperature. 1.0 50 GAMMA (mV/W) 0.8 100 K 0.6 0.4 0.2 Frequency = 10 GHz 0 0 10 20 30 40 50 60 70 Parameter Units D1 D2 BV V 10 10 CJO pF 0.030 0.030 EG eV 1.42 1.42 IBV A 10E-12 10E-12 IS A 12 x 10E-6 84 x 10E-6 1.2 40.0 N 10 TEMPERATURE (C) Figure 1. Forward Current vs. Forward Voltage. D1 represents the characteristic of the HSCH-9161 under forward bias and D2 (in the forward direction) gives the V-I curve of the HSCH-9161 under reverse bias. 12 2 0.01 D2 80 TEMPERATURE (C) Figure 3. Calculated Variation of Voltage Sensitivity vs. Temperature. For product information and a complete list of distributors, please go to our web site: www.avagotech.com Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Pte. in the United States and other countries. Data subject to change. Copyright (c) 2006 Avago Technologies Pte. All rights reserved. Obsoletes 5988-5907EN 5988-6209EN March31, 2006 RS 50 10 PB (VJ) V 0.26 0.26 PT (XTI) 2 2 M 0.5 0.5