MA44781 Dual Pair Anti-Parallel Non-Magnetic PIN Diode RoHS Compliant Features Rev. V3 Absolute Maximum Ratings @ TA=+25 °C (Unless Otherwise Noted) 1 • • • • Designed for MRI applications Anti-Parallel Self Bias Arrangement Non-Magnetic Surface Mount Package SPC Process for Superior Parametric Repeatability • RoHs Compliant with 260°C reflow compatibility Parameter Absolute Maximum Reverse Voltage 60V Forward Current ( per diode pair ) Power Dissipation (per diode) Description The MA44781 device acts as a Passive Switch using silicon PIN diodes in surface mount package.There are two sets of two PIN diode pairs constructed in opposing configurations. The package is sealed with a non-conductive epoxy resin and is suitable for surface mount applications. Applications The MA44781 Device is well suited for MRI Passive switching applications. The PIN Diodes become a high Q, R-C network under small signal and behave as an effective passive rectifier or short circuit under high RF Signal to tune and de-tune the resonant MRI tank circuit. The anti-parallel doublet arrangement provides for more efficient RF power handling. 2 3 2A 1.7 W Operating Temperature -55 °C to +125 °C Storage Temperature -55 °C to +125 °C Junction Temperature +175 °C 1. Operation of this device above any one of these parameters may cause permanent damage. 2. Please refer to application note M538 for surface mounting instructions 3. Total current per diode= I (rms) + I (dc) @ +25C Schematic Internal Construction Electrical Specifications @ TA = +25 °C Breakdown Voltage @ IR = 10μA, Vb = 60V Minimum Part Number MA44781 Junction Capacitance (per diode) Forward Voltage Delta Forward Voltage Total Capacitance f=1MHz Vr=-6.0V If = 20uA If=20uA (between each diodes) Vr=0V (pF) (V) (mV) (pF) 0.15 - 0.50pF 0.500 - 0.780 +/-30 mV 1.5 - 3.5 1 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions • North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice. MA44781 Dual Pair Anti-Parallel Non-Magnetic PIN Diode RoHS Compliant Rev. V3 Case Style 1134 ODS-1134 2 ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions • North America Tel: 800.366.2266 / Fax: 978.366.2266 is considering for development. Performance is based on target specifications, simulated results, • Europe Tel: 44.1908.574.200 / Fax: 44.1908.574.300 and/or prototype measurements. Commitment to develop is not guaranteed. • Asia/Pacific Tel: 81.44.844.8296 / Fax: 81.44.844.8298 PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology Visit www.macomtech.com for additional data sheets and product information. Solutions has under development. Performance is based on engineering tests. Specifications are typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available. M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make Commitment to produce in volume is not guaranteed. changes to the product(s) or information contained herein without notice.