HMC732LC4B

Overview

The HMC732LC4B is a wideband monolithic microwave integrated circuit (MMIC) voltage-controlled oscillator (VCO) operating in the W-band frequency range of 6 GHz to 12 GHz. It integrates the resonator, negative resistance device, and varactor diode within a single chip. The component features an on-chip buffer amplifier for output isolation. It operates with a supply voltage between 4.75 V and 5.25 V, drawing approximately 57 mA. The tuning voltage range spans from 0 VDC to 23 VDC. Key performance metrics include a typical phase noise of -65 dBc/Hz at 1 MHz offset, a tuning sensitivity of -85 MHz/V, and an output power of 1 dBm. Secondary harmonics are suppressed to -12 dBc. The device is housed in a 24-lead QFN package.

Feature Summary

• Integrates resonator, negative resistance device, and varactor diode into a single MMIC structure
• Includes an on-chip buffer amplifier to provide output isolation
• Designed for wideband operation across the 6 GHz to 12 GHz frequency spectrum

Applications

• Radar systems requiring high-frequency signal generation
• Point-to-point wireless communication links
• Test and measurement instrumentation equipment

Procurement Notes

Verify the specific suffix (e.g., LC4B vs. LC4BTR) to ensure correct packaging format, as tape-and-reel variants differ from cut-tape or bulk options. Confirm RoHS compliance status and moisture sensitivity level (MSL 3) requirements against your assembly process specifications. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Ensure that the evaluation board compatibility is checked if initial prototyping is planned. Validate lead times directly with the supplier due to potential supply constraints.

Selection Notes

Select this component when a wideband W-band solution is required without external resonators. The integrated buffer simplifies design by reducing load-pull effects. Compare tuning linearity and phase noise requirements against similar models like the HMC733 if higher frequencies are needed. Consider the thermal dissipation capabilities of the QFN package in high-power environments. Evaluate the control voltage interface to ensure it matches the available DAC or loop filter outputs in the system architecture.

Part Context

The HMC732LC4B belongs to the Analog Devices Hittite Microwave portfolio of RF and microwave components. It is part of a family of wideband VCOs designed for high-performance applications. The device leverages GaAs MMIC technology to achieve compact size and reliable operation. It complements other signal chain elements such as amplifiers and mixers in complex RF subsystems.

Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.