HSMS-285B-TR2G

RF Diode Overview

The HSMS-285B-TR2G is a surface mount zero bias Schottky detector diode from the HSMS-285x series, manufactured by Broadcom Limited. It is optimized for small signal applications with input power below -20 dBm at frequencies under 1.5 GHz. The device utilizes a single diode configuration housed in an SOT-323 package. Key electrical specifications include a maximum forward voltage of 150 mV at 0.1 mA, a maximum reverse leakage current of 250 µA at 2 V, and a typical junction capacitance of 0.30 pF at -0.5 V to -1.0 V. At 915 MHz, it offers a typical tangential sensitivity of -57 dBm and a voltage sensitivity of 40 mV/µW.

RF Diode Feature Summary

• Designed specifically for low-cost, high-volume small signal detection where primary DC bias power is unavailable.
• Provides high detection sensitivity suitable for RF/ID and RF Tag applications operating below 1.5 GHz.
• Features matched diodes within the package to ensure consistent performance and reliability.

RF Diode Applications

• RF/ID (Radio Frequency Identification) systems
• RF Tag circuits
• Small signal crystal video receivers

RF Diode Procurement Notes

Verify the specific suffix TR2G corresponds to the 10000-unit reel packaging format as defined in the official ordering information. Confirm that the SOT-323 package variant matches the design requirements, as the HSMS-285x family includes other configurations such as SOT-23, SOT-143, and SOT-363. Ensure compliance with lead-free assembly profiles during manufacturing.

RF Diode Selection Notes

Select this component only for input power levels strictly less than -20 dBm. For higher power detector applications below 4.0 GHz, consider the HSMS-282x series. For frequencies above 4.0 GHz or higher power levels, utilize the HSMS-286x series instead. This device is not recommended for large signal designs.

RF Diode Part Context

This part belongs to the Avago/Broadcom HSMS-285x family of zero bias Schottky detector diodes. The 'B' designation indicates a single diode configuration within the SOT-323 package. Other variants in the series include pairs, trios, and bridges in different packages like SOT-23 and SOT-143, offering flexibility for various circuit topologies such as voltage doublers.

RF Diode Replacement Considerations

For input powers exceeding -20 dBm below 4.0 GHz, use the HSMS-282x series. For frequencies above 4.0 GHz, use the HSMS-286x series. Direct pin-compatible replacements within the same single-diode SOT-323 form factor are limited to other HSMS-285x single units if electrical parameters align.

RF Diode FAQ

What is the maximum recommended input power for the HSMS-285B?

The HSMS-285B is designed for small signal applications with input power levels less than -20 dBm. It is not recommended for higher power level applications.

What is the typical flicker noise performance of this device?

The HSMS-285x series exhibits low flicker noise, specified as -162 dBV/Hz at 100 Hz, which helps maintain sensitivity in crystal video receivers.

How does the HSMS-285B differ from the HSMS-282x series?

The HSMS-285B is optimized for small signals below -20 dBm. The HSMS-282x series is recommended for detector applications with input power levels greater than -20 dBm at frequencies below 4.0 GHz.