Analog Devices Inc. HMC-C044

Overview

HMC-C044 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC passive I/Q mixer module operating from 15–23 GHz RF/LO and DC–3.5 GHz IF, delivering 30 dB image rejection, +25 dBm input IP3, and 10 dB typical conversion loss as an image-reject mixer or single-sideband upconverter in microwave radio systems.

For engineers reviewing the HMC-C044 datasheet, HMC-C044 pinout, HMC-C044 application, or HMC-C044 equivalent, this hermetic C-4 module with field-replaceable SMA connectors supports precision quadrature signal processing in point-to-point radios, test instrumentation, and military communications where amplitude/phase balance (<0.3 dB / <4°), LO–RF isolation (35 dB), and wide IF bandwidth are critical selection criteria.

Technical Context

The HMC-C044 integrates two double-balanced GaAs MESFET mixer cells and a monolithic 90° hybrid to generate I/Q outputs, enabling image rejection without external hybrids. Its DC–3.5 GHz IF bandwidth supports baseband and low-IF architectures, while removable SMA connectors allow direct microstrip or coplanar waveguide integration.

Designed for operation at +17 dBm LO drive, the module achieves 30 dB image rejection and maintains amplitude/phase balance across temperature (−55°C to +85°C). It exhibits +15 dBm input P1dB and −30 dBc LO–RF spurious suppression at 17.6 GHz RF with +15 dBm LO.

Key Specifications

Pinout & Package

Hermetically sealed C-4 package with gold-plated Kovar body, nickel-plated aluminum mounting spacer, and field-replaceable Tensolite 5602-5CCSF SMA connectors. Dimensions: 0.850″ × 0.550″ × 0.250″ (21.6 × 14.0 × 6.35 mm).

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC-C044, HMC1044LP4E offers smaller footprint and lower assembly cost but sacrifices modularity and ease of test; ADMV1013ACPZ adds active functionality and wider bandwidth at the expense of power, complexity, and thermal management overhead.

Availability

HMC-C044 is available at Aetrix Electronics and suitable for point-to-point radios, test equipment & sensors, and military end-use applications requiring stable component supply, hermetic reliability, and field-serviceable RF interfaces.

Supply support for HMC-C044 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 acquired Hittite Microwave in 2014 and continues its legacy of high-performance RF/microwave components for defense, communications, and instrumentation markets.

The HMC-C044 belongs to the legacy Hittite MMIC mixer product line, engineered specifically for Ku-band image-reject and SSB conversion in mission-critical microwave systems demanding repeatability and environmental robustness.

FAQ

What is the operating temperature range for the HMC-C044?

The HMC-C044 operates over −55°C to +85°C, verified per absolute maximum ratings and electrical specifications tables. Its hermetic C-4 package and GaAs MMIC construction ensure stable amplitude/phase balance and image rejection across this full industrial/military range. Thermal resistance is 191.5°C/W junction-to-package bottom, supporting reliable operation in uncooled outdoor enclosures. The HMC-C044 datasheet confirms performance data at +25°C, −55°C, and +85°C for key parameters including conversion gain and image rejection.

Does the HMC-C044 require DC bias or external power?

No, the HMC-C044 is a passive GaAs MMIC mixer and requires no DC bias or external power supply. It operates solely on RF, LO, and IF signal energy. The only electrical constraints are the ±3 mA current limit on IF1/IF2 pins for DC-coupled operation and the +13 to +19 dBm recommended LO drive level. This passive nature eliminates power supply noise coupling and thermal drift concerns, making the HMC-C044 ideal for low-noise receiver front-ends and battery-constrained test equipment.

Can the HMC-C044 be used as both an image-reject mixer and a single-sideband upconverter?

Yes, the HMC-C044 is explicitly designed for dual-mode operation: as an image-reject mixer (IRM) for downconversion and as a single-sideband (SSB) upconverter for transmission. Its internal 90° hybrid and dual double-balanced cells enable both functions without hardware modification. The datasheet provides separate conversion loss, image rejection, and sideband suppression data for each mode, confirming validated performance in both configurations across the full 15–23 GHz band.

What is the IF bandwidth specification of the HMC-C044, and how does it affect system design?

The HMC-C044 supports DC–3.5 GHz IF bandwidth on both IF1 and IF2 ports, enabling true baseband I/Q output without external DC blocking. This allows direct connection to ADCs with DC-coupled inputs and supports complex modulation formats including OFDM and wideband QAM. The wide IF range also permits flexible IF placement-e.g., 100 MHz USB or zero-IF-without compromising image rejection or amplitude/phase balance, simplifying receiver architecture and reducing component count.

Are the SMA connectors on the HMC-C044 truly field-replaceable, and what is the specified part number?

Yes, the SMA connectors on the HMC-C044 are explicitly designated as field-replaceable per the outline drawing notes, using Tensolite 5602-5CCSF or equivalent. The module's mechanical design includes standardized mounting hardware (0-80 screws) and a nickel-plated aluminum spacer to facilitate connector removal and reinstallation without damaging the C-4 package. This feature enables repair, rework, and interface adaptation-such as replacing SMA with K-connectors-for specialized test setups or production validation.