Analog Devices Inc. HMC329A-SX

Overview

HMC329A-SX from Analog Devices is a GaAs MMIC double-balanced mixer operating from 22 GHz to 38 GHz, supporting both upconversion and downconversion with no DC bias required. It delivers 9–11 dB typical conversion loss, 37–36 dB LO-to-RF isolation, and 17–21 dBm input IP3 across its band, enabling high-linearity signal translation in millimeter-wave radios and test equipment.

For engineers reviewing the HMC329A-SX datasheet, HMC329A-SX pinout, HMC329A-SX application, or HMC329A-SX equivalent, key selection criteria include RF/LO frequency coverage (22–38 GHz), IF bandwidth (DC–8 GHz), passive operation, thermal performance (θ_JC = 170°C/W), and C-7-5 chip-scale package compatibility with wedge bonding.

Technical Context

The HMC329A-SX implements a double-balanced topology using integrated balun structures to achieve high LO-to-RF and LO-to-IF suppression without external matching components. Its passive design eliminates DC biasing requirements and simplifies integration into compact millimeter-wave front-ends.

It operates with ≥13 dBm LO drive and supports both upper and lower sideband configurations across all RF/IF combinations. Performance remains stable over −55°C to +85°C ambient temperature, with validated operation up to 150°C junction temperature.

Key Specifications

Pinout & Package

The HMC329A-SX is supplied in a bare-die C-7-5 package (0.87 mm × 0.58 mm × 0.102 mm) requiring direct attachment to RF ground plane via eutectic bond or conductive epoxy. All ground pads (Pins 1, 4, 5, 7 and die bottom) must be connected to RF/dc ground per Figure 3 of the datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC1048LP3E and QPC1006, the HMC329A-SX offers superior LO-to-RF isolation above 30 GHz and minimal footprint-critical for phased-array beamforming networks where layout density and spurious suppression directly impact sidelobe performance.

Availability

HMC329A-SX is available at Aetrix Electronics and suitable for point-to-point radios, millimeter-wave test equipment, and military radar sensors requiring stable component supply across extended temperature ranges and high-frequency performance consistency.

Supply support for HMC329A-SX 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 communications, industrial, and defense markets with precision signal processing solutions.

The HMC329A-SX belongs to Analog Devices' Hittite Microwave MMIC product line, engineered specifically for millimeter-wave infrastructure and instrumentation where broadband linearity, isolation, and passive reliability are non-negotiable.

FAQ

What is the operating temperature range for the HMC329A-SX?

The HMC329A-SX operates over an ambient temperature range of −55°C to +85°C, with a maximum channel temperature of 150°C. Its passive GaAs MMIC construction ensures stable RF performance across this full range without bias drift or gain variation, making it suitable for outdoor wireless infrastructure and aerospace environments where thermal cycling is severe.

Does the HMC329A-SX require external DC bias or matching components?

No, the HMC329A-SX is a fully passive double-balanced mixer requiring no DC bias or external matching components. The LO and RF ports are internally AC-coupled and impedance-matched to 50 Ω across 22–38 GHz, while the IF port is DC-coupled and rated for ±2 mA current. This eliminates discrete bias tees, capacitors, or inductors in the signal path.

What is the recommended LO drive level for optimal performance of the HMC329A-SX?

The HMC329A-SX is specified for optimal linearity and conversion loss with ≥13 dBm LO drive. At 13 dBm, it achieves 9–11 dB typical conversion loss and 17–21 dBm input IP3. Lower LO power (e.g., 11 dBm) increases conversion loss by ~1–2 dB and degrades IP3 by ~3–4 dBm, so maintaining ≥13 dBm is critical for E-band system specifications.

Can the HMC329A-SX be used for both upconversion and downconversion?

Yes, the HMC329A-SX supports bidirectional operation: as a downconverter (22–38 GHz RF → DC–8 GHz IF) and as an upconverter (DC–8 GHz IF → 22–38 GHz RF). Its symmetric double-balanced architecture ensures consistent isolation and linearity in both modes, verified across upper and lower sidebands in the datasheet's performance plots.

What package type and mounting method does the HMC329A-SX use?

The HMC329A-SX is supplied in a bare-die C-7-5 package (0.87 × 0.58 × 0.102 mm) with gold-plated ground pads. It must be mounted eutectically or with conductive epoxy directly onto a grounded alumina or quartz substrate, then wire-bonded using 3-mil gold ribbon or wedge bonds to 50 Ω microstrip lines per Analog Devices' assembly guidelines.