HHM1904A1

Balun Overview

The HHM1904A1 is a signal conditioning LTCC balun manufactured by TDK Corporation, designed for RF applications within the 2400-2500 MHz frequency range. It features an unbalanced port characteristic impedance of 50 Ohms and a balanced port characteristic impedance of 75 Ohms. The component utilizes SMD/SMT surface mount technology in a compact 0402 (1005 metric) package. It operates reliably across a temperature range from -40°C to +85°C. The device exhibits an insertion loss of 0.8 dB and is intended for board mounting in high-frequency circuit designs.

Balun Feature Summary

• Converts between unbalanced and balanced signals using Low Temperature Co-fired Ceramic technology
• Provides impedance transformation between 50 Ohm and 75 Ohm ports
• Optimized for operation in the 2.4 GHz to 2.5 GHz frequency band
• Utilizes a compact 0402 surface-mount footprint for space-constrained layouts

Balun Applications

• Wireless local area network (WLAN) systems
• Bluetooth communication modules
• Zigbee and other IEEE 802.15.4 based devices
• RF front-end signal conditioning circuits

Balun Procurement Notes

Verify current availability status as the component may be subject to discontinuation notices. Confirm RoHS compliance details through official documentation before integration. Ensure that the specific ordering suffix matches the required packaging format. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Validate electrical parameters against the latest datasheet revision prior to final design approval.

Balun Selection Notes

Select this component when a 50-to-75 Ohm impedance transformation is required in the 2.4 GHz ISM band. Consider the 0402 package size for PCB layout constraints. Evaluate the insertion loss specification against system link budget requirements. Ensure the operating temperature range aligns with the environmental conditions of the target application. Compare performance metrics with alternative baluns if broader bandwidth or different impedance ratios are needed.

Balun Part Context

This part belongs to the HHM series of LTCC baluns produced by TDK Corporation. These components are engineered for high-frequency signal processing in consumer electronics and wireless communication devices. The series offers various impedance configurations and frequency ranges to support diverse RF interface requirements. The HHM1904A1 specifically addresses the need for balanced-unbalanced conversion in compact form factors.

Balun Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.