HHM1927A4

Balun Overview

The HHM1927A4 is an LTCC balun manufactured by TDK Corporation, designed for signal conditioning in RF applications. It operates within a frequency range of 1805 MHz to 2170 MHz, with a center frequency of 1987.5 MHz and a bandwidth of 365 MHz. The component provides impedance transformation between 50 Ohms and 100 Ohms. It features a low insertion loss of 1 dB and is housed in a compact 0402 (1005 metric) surface-mount package. The device supports board mounting and functions within a temperature range of -40°C to +85°C.

Balun Feature Summary

• Utilizes LTCC technology for high-frequency signal balancing
• Provides balanced-to-unbalanced impedance conversion
• Compact surface-mount design for space-constrained layouts

Balun Applications

• Wireless communication modules
• RF front-end circuits
• Mobile device antenna interfaces

Balun Procurement Notes

Verify the specific ordering suffix and packaging configuration when sourcing, as availability may vary between cut tape, reel, or MouseReel formats. Confirm RoHS compliance status and ensure the supplier provides valid manufacturer documentation to guarantee authenticity. Cross-reference the part number with official TDK catalogs to avoid substitution errors during procurement.

Balun Selection Notes

Select this component for designs requiring precise impedance matching between 50-ohm and 100-ohm lines in the 1.8–2.2 GHz band. Ensure the PCB layout accommodates the 0402 footprint and thermal requirements. Validate that the operating environment stays within the specified -40°C to +85°C range to maintain performance stability and reliability.

Balun Part Context

This part belongs to the HHM series of LTCC baluns from TDK. These components are engineered for high-performance RF signal processing in modern electronic devices. The series offers various impedance options and frequency ranges to support diverse wireless standards and application requirements.

Balun Replacement Considerations

Consult official TDK documentation for verified substitute part numbers. Do not assume cross-compatibility with other manufacturers' baluns without rigorous electrical testing and parameter comparison.