HSMS-285B-BLKG

RF Diode Overview

The HSMS-285B-BLKG is a surface-mount zero bias Schottky detector diode from the Broadcom HSMS-285x family, housed in an SOT-323 (SC-70) package. It features a single diode configuration optimized for small signal applications with input power below -20 dBm at frequencies under 1.5 GHz. Key electrical specifications include a maximum peak inverse voltage of 2.0 V, a typical forward voltage of 150 mV at 0.1 mA, and a maximum reverse leakage current of 250 nA at 2 V. The device exhibits a typical junction capacitance of 0.30 pF at -0.5 V to -1.0 V. RF performance metrics at 915 MHz include a typical tangential sensitivity of -57 dBm, voltage sensitivity of 40 mV/µW, and video resistance of 8.0 kΩ.

RF Diode Feature Summary

• Optimized for low-cost, high-volume designs in small signal detection applications where primary DC bias power is unavailable.
• Manufacturing techniques ensure matched diodes when multiple devices are mounted in a single package for consistent performance.
• Provides high detection sensitivity up to 50 mV/µW at 915 MHz with low flicker noise characteristics.

RF Diode Applications

• RFID and RF Tag applications requiring zero bias detection.
• Crystal video receivers operating at frequencies below 1.5 GHz.
• Small signal detector circuits with input power levels less than -20 dBm.

RF Diode Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific EOL notifications or PCN updates prior to procurement. Ensure handling precautions for electrostatic sensitive devices are observed during storage and assembly processes.

RF Diode Selection Notes

Select this component for narrow-band detector designs requiring maximum sensitivity over a specific frequency range. For applications with input power greater than -20 dBm, consider the HSMS-282x series for frequencies below 4.0 GHz or the HSMS-286x series for frequencies above 4.0 GHz. Ensure impedance matching networks are designed based on the specific RF impedance characteristics provided in the datasheet.

RF Diode Part Context

The HSMS-285B-BLKG belongs to the HSMS-285x series of zero bias Schottky detector diodes. This series includes various configurations such as single diodes (HSMS-2850), series pairs (HSMS-2852), unconnected pairs (HSMS-2855), series pairs (HSMS-285C), unconnected trios (HSMS-285L), and bridge quads (HSMS-285P). All variants share similar core electrical characteristics but differ in internal connectivity and package pinout arrangements.

RF Diode Replacement Considerations

For higher power detector applications exceeding -20 dBm input, use the HSMS-282x series for frequencies below 4.0 GHz or the HSMS-286x series for frequencies above 4.0 GHz. Other members of the HSMS-285x family may serve as functional substitutes if package compatibility and internal diode configuration requirements align with the design constraints.

RF Diode FAQ

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

The HSMS-285B-BLKG is designed and optimized for small signal applications with input power levels below -20 dBm. It is not recommended for larger signal designs.

How does the HSMS-285B-BLKG perform in terms of flicker noise?

The device exhibits low flicker noise, specified as -162 dBV/Hz at 100 Hz. This characteristic helps maintain sensitivity in crystal video receivers by minimizing noise at low video frequencies.

What is the typical tangential sensitivity of the HSMS-285B-BLKG at 915 MHz?

At 915 MHz, the typical tangential sensitivity is -57 dBm, measured with a video bandwidth of 2 MHz and an input power of -40 dBm.