HMC798LC4

RF Mixers Overview

The HMC798LC4 is a GaAs MMIC sub-harmonic mixer designed for VSAT applications. It operates with an RF frequency range of 24 GHz to 34 GHz and an LO frequency of 12 GHz to 18 GHz, producing an IF output from 0 Hz to 4 GHz. The device features a maximum conversion loss of 13.5 dB, an OIP3 of 20 dBm, and a P1dB of 9 dBm. It requires a 5 V supply with a typical current draw of 97 mA. Packaged in a 24-lead LGA (3.9x3.9 mm) surface-mount case, it supports operating temperatures between -40°C and +85°C.

RF Mixers Feature Summary

• Utilizes GaAs MMIC technology for high-reliability sub-harmonic mixing
• Supports low-noise performance suitable for sensitive receiver front-ends
• Enables compact surface-mount integration via leadless LGA packaging

RF Mixers Applications

• VSAT satellite communication systems
• Point-to-point microwave radio links
• High-frequency test and measurement equipment

RF Mixers Procurement Notes

Verify component authenticity through authorized Analog Devices channels or certified distributors. Confirm RoHS compliance status and MSL rating prior to assembly. Ensure ESD-safe handling procedures are followed due to the sensitivity of the GaAs die. Cross-reference datasheet revisions to confirm pinout consistency if integrating into existing designs.

RF Mixers Selection Notes

Select this component when designing systems requiring sub-harmonic mixing in the Ka-band spectrum. Consider the specific LO drive requirements and thermal dissipation capabilities of the 24-lead LGA package. Evaluate the trade-off between conversion loss and linearity metrics against system noise figure budgets. Ensure the PCB layout supports the required impedance matching for the 24-34 GHz RF port.

RF Mixers Part Context

This part belongs to the HMC798 series of sub-harmonic mixers from Analog Devices. It is specifically engineered for high-frequency wireless communications where direct RF generation is impractical. The LC4 suffix denotes the specific leadless LGA package variant optimized for automated surface-mount assembly processes.

RF Mixers Replacement Considerations

The HMC798ALC4 is a documented active substitute within the same family. The original HMC798LC4 is marked as obsolete; verify functional equivalence and pin compatibility before transitioning to alternative sources or updated revisions.