Analog Devices Inc. HMC773A

Overview

HMC773A from Analog Devices is a GaAs MMIC double-balanced passive mixer designed for RF-to-IF downconversion and IF-to-RF upconversion across 6 GHz to 26 GHz. It delivers 10 dB typical conversion loss, 21 dBm input IP3, and dc–10 GHz IF bandwidth, operating with ≥13 dBm LO drive and requiring no DC bias or external matching components. It serves as the core frequency translation element in millimeter-wave point-to-point radio front-ends.

For engineers reviewing the HMC773A datasheet, HMC773A pinout, HMC773A application, or HMC773A equivalent, this page provides verified RF performance data, validated terminal functions, confirmed thermal and isolation specs, and real-world deployment guidance for 5G backhaul, military comms, and test instrumentation signal chains.

Technical Context

The HMC773A implements a double-balanced topology using optimized on-die balun structures to achieve high LO-to-RF (39 dB typ) and LO-to-IF (33 dB typ) isolation. Its passive design eliminates DC bias requirements and enables operation over the full dc–10 GHz IF range without external filtering or coupling networks.

It supports both upper and lower sideband downconversion modes with consistent P1dB (12 dBm typ), IP2 (46 dBm typ), and noise figure (10 dB typ) across its 6–26 GHz RF band. Performance remains stable across −55°C to +85°C ambient, with thermal resistance θJC = 225°C/W in the C-6-12 package.

Key Specifications

Pinout & Package

The HMC773A is supplied as a bare GaAs MMIC die in the C-6-12 package: 1.290 mm × 0.880 mm × 0.102 mm, with six bond pads arranged linearly. Mounting requires eutectic die attach or conductive epoxy to a grounded alumina substrate, and 50 Ω microstrip routing per Analog Devices' assembly guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC773A, HMC1048LP3E adds LO gain but increases power consumption and footprint, while QPC1006 trades passive simplicity for active power handling-making HMC773A optimal for compact, low-power, high-linearity mmWave downconverters.

Availability

HMC773A is available at Aetrix Electronics and suitable for point-to-point radios, test equipment, and military communications systems requiring stable component supply, traceable lot control, and long-term obsolescence mitigation.

Supply support for HMC773A 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 HMC773A belongs to Analog Devices' Hittite Microwave MMIC product line, engineered specifically for millimeter-wave frequency translation in demanding wireless infrastructure and electronic warfare platforms.

FAQ

What is the recommended LO drive level for optimal performance of the HMC773A?

The HMC773A achieves specified conversion loss, IP3, and isolation with a minimum LO drive of 13 dBm. Operating below this level degrades linearity and increases conversion loss; exceeding it yields diminishing returns and risks absolute maximum rating violation. The datasheet confirms stable performance at 13–15 dBm across temperature and frequency.

Does the HMC773A require DC bias or external matching components?

No-HMC773A is a passive double-balanced mixer with no DC bias requirement. Its LO and RF ports are internally 50 Ω matched, and the IF port is dc-coupled. External components are unnecessary for basic operation, though an AC-coupling capacitor may be added to the IF port if dc blocking is needed.

Can the HMC773A be used for both upconversion and downconversion?

Yes-the HMC773A is bidirectional. As a downconverter, it translates 6–26 GHz RF to dc–10 GHz IF; as an upconverter, it translates dc–10 GHz IF to 6–26 GHz RF. Both modes are characterized in the datasheet with verified performance across sidebands, temperatures, and LO drive levels.

What is the thermal resistance and maximum channel temperature for the HMC773A?

The HMC773A has a junction-to-case thermal resistance (θJC) of 225°C/W in the C-6-12 package. Its absolute maximum channel temperature is 175°C, with continuous operation rated from −55°C to +85°C ambient. Thermal design must ensure die temperature stays within limits under worst-case RF/LO power dissipation.

How is the IF port configured for dc-coupled versus ac-coupled operation in the HMC773A?

The IF port of the HMC773A is dc-coupled by default. For dc-coupled use, ensure net current sourced/sunk does not exceed ±2 mA to prevent malfunction. For ac-coupled operation (e.g., when dc blocking is required), add an external series capacitor sized to pass the target IF frequency band-no internal modification is needed.