Analog Devices Inc. HMC329ALC3BTR-R5

Overview

HMC329ALC3BTR-R5 from Analog Devices is a GaAs MMIC double-balanced mixer operating from 24 GHz to 32 GHz, supporting both upconversion and downconversion with 11 dB typical conversion loss, 20 dBm input IP3, and 36.5 dB LO-to-RF isolation (24–30 GHz). It serves as a core RF front-end component in microwave VSAT radios and military electronic warfare systems.

For engineers reviewing the HMC329ALC3BTR-R5 datasheet, HMC329ALC3BTR-R5 pinout, HMC329ALC3BTR-R5 application, or HMC329ALC3BTR-R5 equivalent, key selection criteria include RF/LO frequency coverage (24–32 GHz), IF bandwidth (DC–8 GHz), passive operation requiring ≥9 dBm LO drive, and 3 mm × 3 mm LCC package compatibility with high-frequency PCB layout practices.

Technical Context

The HMC329ALC3BTR-R5 uses optimized balun structures to achieve high LO-to-RF and LO-to-IF suppression without external matching components. Its double-balanced architecture inherently rejects even-order harmonics and local oscillator leakage.

It operates as a passive device: RF and LO ports are ac-coupled and 50 Ω matched; the IF port is dc-coupled and supports operation from DC, with ±3 mA current limit. Performance is specified at TA = 25°C, LO = 13 dBm, and IF = 1000 MHz for downconversion.

Key Specifications

Pinout & Package

The HMC329ALC3BTR-R5 is housed in a 3 mm × 3 mm ceramic leadless chip carrier (LCC) package (E-12-4) with an exposed thermal pad requiring RF/dc ground connection. Six ground pins ensure low-inductance return paths for RF and LO signals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar double-balanced mixer applications.

Compared with HMC554ALC3BTR-R5 and QPC1006, the HMC329ALC3BTR-R5 offers optimal balance of Ka-band coverage, moderate LO drive, and drop-in manufacturability-making it preferred for volume military and VSAT designs where supply chain maturity and proven field reliability are prioritized.

Availability

HMC329ALC3BTR-R5 is available at Aetrix Electronics and suitable for microwave VSAT radios, electronic warfare systems, military radar transceivers, and high-frequency test equipment requiring stable component supply across extended temperature ranges and high-reliability production cycles.

Supply support for HMC329ALC3BTR-R5 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and RF ICs, serving aerospace, defense, communications, and instrumentation markets with precision signal processing solutions.

The HMC329ALC3BTR-R5 belongs to Analog Devices' Hittite Microwave MMIC product line, engineered specifically for broadband Ka-band RF front-ends where integration, repeatability, and ruggedized packaging are essential.

FAQ

What is the minimum LO drive level required for proper operation of the HMC329ALC3BTR-R5?

The HMC329ALC3BTR-R5 requires a minimum LO drive level of 9 dBm for specified conversion loss and linearity performance. Operation below this level degrades conversion loss, increases noise figure, and reduces IP3. The datasheet specifies optimal performance at 13 dBm, with maximum rated LO input at 24 dBm. Always verify LO amplitude at the device pin using calibrated RF measurement.

Does the HMC329ALC3BTR-R5 require external biasing or matching components?

No, the HMC329ALC3BTR-R5 is a fully passive double-balanced mixer with integrated baluns. Neither DC bias nor external matching networks are needed. LO and RF ports are ac-coupled and 50 Ω matched; the IF port is dc-coupled. Only proper RF grounding-including all GND pins and the exposed pad-is required for full specification compliance.

Can the HMC329ALC3BTR-R5 be used for zero-IF (direct-conversion) receiver applications?

Yes, the HMC329ALC3BTR-R5 supports zero-IF operation because its IF port is dc-coupled and functional from DC. However, users must ensure the IF source/sink current remains within ±3 mA to prevent die malfunction. For true baseband output, low-pass filtering and DC offset calibration circuitry must be implemented externally.

What is the thermal resistance (θJA) of the HMC329ALC3BTR-R5, and how does it affect power handling?

The HMC329ALC3BTR-R5 has a θJA of 120 °C/W (natural convection, JEDEC JESD51-2). With a maximum junction temperature of 175°C and ambient up to +85°C, this limits continuous power dissipation to 200 mW. Effective thermal design-especially robust grounding of the exposed pad to a multilayer PCB ground plane-is essential to sustain performance under sustained RF input.

How does the HMC329ALC3BTR-R5 perform at 31–32 GHz, and is LO-to-RF isolation maintained?

At 31–32 GHz, the HMC329ALC3BTR-R5 maintains usable performance: conversion loss rises to ≤13.5 dB, and LO-to-RF isolation decreases to 22.5–30.5 dB (typical). While still functional, designers should verify isolation margins against system-level spurious requirements-especially in high-dynamic-range EW receivers where LO leakage could mask weak signals.