Tiny Surface-Mount Diodes for Devices Ranging From RF Tags to TV Systems

The latest package helps Avago customers design in ever-smaller components in limited board spaces, allowing for creation of more competitively priced, compact, feature-rich wireless devices. The package meets the European Union's Reduction of Hazardous Substances (RoHS) directive.

Each of the three Schottky-barrier diodes (HSMS-282Y, HSMS-285Y, HSMS-286Y) and the single PIN (positive-intrinsic-negative) switching diode (HSMP-389) is supplied in the low-cost industry-standard SOD-523 (small outline diode) package. These products add to Avago Technologies' surface-mount diode family, which includes devices in such industry-standard packages as SOT-23, SOT-143, SOT-323, SOT-363, SOT-25 and SOD-323. They are fabricated on 6-inch silicon wafers using Avago's proprietary diode processes. "Our new SOD-523-packaged diodes demonstrate Avago's focus on miniaturization with increasingly higher performance that continue to make our customers competitive worldwide," said Chee-Yong Saw, worldwide product marketing manager for silicon diode/RFIC products in the Wireless Semiconductor Division at Avago Technologies.

The Avago HSMS-282Y Schottky-barrier diode is optimized for signal detection applications up to 4 GHz and for mixing or frequency multiplying applications up to 6 GHz. It is an excellent choice as a detector and mixer for mobile handsets, wireless infrastructure, WLAN (wireless local-area network), WiMAX (IEEE 802.16 broadband wireless access) and cordless phones, where low turn-on voltage and low resistance is most desirable. This device features low turn-on voltage of 0.34 V at 1 mA and low dynamic resistance of 12 ohms at 5 mA).

The HSMS-285Y is a zero-bias detector diode optimized for use in small signal applications at frequencies below 1.5 GHz. It is particularly suitable for RFID tags where primary DC-biased power is not available. It combines high-detection sensitivity (up to 50 mV/uW at 915 MHz) with low flicker noise (-162 dBV/Hz at 100 MHz).

The HSMS-286Y is optimized for use as a large-signal detector, as well as for modulating, signal converting and voltage doubling applications up to 6 GHz, where large signal detection is most critical. It provides the performance needed for applications including RFID and RF tag readers, and for DBS (direct broadcast satellite) LNBs (low noise block downconverters). It features high-detection sensitivity (50 mV/uW at 915 MHz, 35 mV/uW at 2.45 GHz, 25 mV/uW at 5.80 GHz).

The HSMP-389Y is a PIN (positive-intrinsic-negative) diode optimized for switching applications up to 3 GHz where low insertion loss, low series resistance at low current and low capacitance are required. Applications range from wireless infrastructure and cable television (CATV), use as a DBS LNB multiswitch, and for switching in mobile handsets, cordless phones, and WLAN and WiMAX cards and access points. The low insertion loss and series resistance is at 100 MHz, typical RS of 3.8 ohms at 1 mA, 1.8 ohms at 5 mA, 1.5 ohms at 10 mA; low total capacitance is at 1 MHz, a CT of 0.20 pF typical with VR of 5 V. The HSMP-389Y also features a short carrier lifetime of 200 ns at IF of 10 mA and IR of 5 mA.