HSMS-285C-TR1G

RF Diode Overview

The HSMS-285C-TR1G is a surface-mount zero bias Schottky detector diode from the HSMS-285x series, manufactured by Broadcom Limited (formerly Avago Technologies). It features a matched series pair configuration in an SOT-323 package. The device is optimized for small signal applications with input power below -20 dBm at frequencies under 1.5 GHz. Key electrical specifications include a typical forward voltage of 150 mV at 0.1 mA, maximum reverse leakage current of 250 µA at 2 V, and typical junction capacitance of 0.30 pF at -0.5 V to -1.0 V. It exhibits high detection sensitivity up to 50 mV/µW at 915 MHz and low flicker noise of -162 dBV/Hz at 100 Hz.

RF Diode Feature Summary

• Optimized for small signal detection in RF/ID and RFID tag applications where primary DC bias power is unavailable.
• Contains matched diodes within a single package to ensure consistent performance and high degree of matching.
• Provides high detection sensitivity and low flicker noise characteristics suitable for crystal video receivers.
• Lead-free construction compliant with environmental substance directives.

RF Diode Applications

• RF/ID and RFID Tag receiver circuits
• Crystal video detectors for low-power RF signals
• Small signal detection in frequencies below 1.5 GHz

RF Diode Procurement Notes

Verify the ordering suffix TR1G indicates a 3000-unit quantity on a 7-inch reel. Confirm the manufacturer source is Broadcom Limited or authorized distributors. Ensure the component matches the HSMS-285x series specifications for zero bias Schottky detection. Check for lead-free compliance if required by assembly standards.

RF Diode Selection Notes

Select this component for designs requiring zero bias detection of signals weaker than -20 dBm. The HSMS-285C specifically provides a series pair configuration, which facilitates voltage doubler circuit topologies. For higher input power levels above -20 dBm, consider the HSMS-282x or HSMS-286x series instead. Ensure the operating frequency remains below 1.5 GHz for optimal performance.

RF Diode Part Context

The HSMS-285C is part of the broader HSMS-285x family of zero bias Schottky detector diodes. This family includes various configurations such as single diodes, unconnected pairs, trios, and bridges. The 'C' designation specifically denotes the series pair configuration within the SOT-323 package outline. These devices are designed for cost-effective, high-volume production in compact surface-mount formats.

RF Diode Replacement Considerations

For higher power 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 be considered if different internal configurations (single, trio, bridge) are required, but the series pair topology of the HSMS-285C is unique for voltage doubler implementations.

RF Diode FAQ

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

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

What does the 'C' suffix indicate in the HSMS-285C model number?

The 'C' suffix indicates that the device contains a series pair of matched diodes within the SOT-323 package. This configuration is suitable for creating voltage doubler circuits.

What is the typical flicker noise performance of this device?

The HSMS-285x series exhibits low flicker noise, typically -162 dBV/Hz at 100 Hz. This characteristic helps maintain sensitivity in crystal video receivers at low video frequencies.