Analog Devices Inc. HMC-C035

Overview

HMC-C035 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC double-balanced mixer module operating from 23–37 GHz RF/LO and DC–13 GHz IF, delivering 9–12 dB conversion loss, +19 dBm input IP3, and 35 dB LO/RF isolation - ideal for millimeter-wave up/downconversion in radar and test instrumentation.

For engineers reviewing the HMC-C035 datasheet, HMC-C035 pinout, HMC-C035 application, or HMC-C035 equivalent, key selection criteria include its hermetic C-11 module package, field-replaceable 2.92 mm connectors, no-DC-bias passive operation, and verified performance across –55°C to +85°C industrial temperature range.

Technical Context

The HMC-C035 implements a passive double-balanced architecture using optimized GaAs MMIC balun structures to achieve high LO-to-RF and LO-to-IF suppression without external matching components. It operates as a broadband frequency translator with fixed 50 Ω DC-coupled ports and supports both upconversion and downconversion modes.

Its RF/LO port symmetry enables flexible use as a bi-phase modulator/demodulator or phase comparator. The module requires LO drive between +11 and +15 dBm and delivers stable conversion gain across temperature and frequency, with measured SSB noise figure of 9–12 dB at +25°C and 1 GHz IF.

Key Specifications

Pinout & Package

The HMC-C035 is housed in a hermetically sealed C-11 metal module with gold-plated Kovar™ body and nickel-plated aluminum mounting spacer. Field-replaceable Tensolite 231CCSF (or equivalent) 2.92 mm coaxial connectors are mounted on three sides for RF, LO, and IF I/O.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC-C035, HMC1048LP4E trades E-band optimization for wider RF coverage, while QPC1006 sacrifices passive operation and DC IF for higher IP3 - making HMC-C035 uniquely balanced for hermetic, bias-free, DC–13 GHz IF E-band systems.

Availability

HMC-C035 is available at Aetrix Electronics and suitable for telecom infrastructure, military radar & ECM, and space systems requiring stable component supply, long-lifecycle assurance, and hermetic reliability in extreme thermal environments.

Supply support for HMC-C035 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 integrates its high-frequency RF/microwave portfolio into precision analog and RF solutions for defense, aerospace, and communications.

The HMC-C035 belongs to Hittite's legacy GaAs MMIC mixer family, engineered specifically for millimeter-wave systems demanding high isolation, wide IF bandwidth, and ruggedized packaging without DC bias.

FAQ

What is the recommended LO drive level for optimal performance of the HMC-C035?

The HMC-C035 achieves best conversion loss and isolation with LO drive between +11 dBm and +15 dBm, with +13 dBm specified as typical test condition. Operating below +11 dBm increases conversion loss and degrades IP3; above +15 dBm risks exceeding absolute maximum rating of +23 dBm and may cause compression or damage. The HMC-C035 must be driven within this window to maintain its 9–12 dB conversion loss and 35 dB LO/RF isolation specifications.

Can the HMC-C035 operate with DC-coupled IF signals, and what are the limits?

Yes, the HMC-C035 supports true DC-coupled IF operation via Pin 2, but it must not source or sink more than ±2 mA DC current - exceeding this causes non-function or permanent damage. For AC-coupled IF applications, an external series capacitor sized for the target IF band is required. This DC capability makes the HMC-C035 suitable for zero-IF receivers and baseband modulation schemes where the HMC-C035 serves as the final translation stage before ADC/DAC.

Is the HMC-C035 pin-compatible with other Hittite mixer modules like the HMC-C027 or HMC-C040?

No, the HMC-C035 uses a unique 3-pin C-11 module footprint with dedicated LO, IF, and RF terminals in fixed physical locations - it is not pin-compatible with HMC-C027 (different frequency range and pinout) or HMC-C040 (4-pin configuration with separate RF/LO/IF/ground). Mechanical and electrical interface differences require board-level redesign for substitution. Always verify pin mapping and connector orientation before integration of the HMC-C035.

Does the HMC-C035 require external matching components or filtering for standard operation?

No, the HMC-C035 is fully matched to 50 Ω at all ports (LO, RF, IF) and requires no external matching networks, baluns, or DC blocking capacitors for basic operation. Its integrated GaAs MMIC balun structure provides inherent broadband impedance matching across 23–37 GHz. External filtering may be added for spurious suppression or band limiting, but the HMC-C035 functions as a drop-in mixer module - simplifying layout and reducing bill-of-materials when deploying the HMC-C035 in compact RF subsystems.

What is the significance of the "C-11" package designation for the HMC-C035?

The C-11 designation identifies the HMC-C035's hermetic metal module package with Kovar™ body, gold plating, and standardized 2.92 mm coaxial connector mounting pattern. It defines mechanical dimensions, thermal expansion coefficient, and RF shielding integrity - critical for millimeter-wave stability and reliability. The C-11 form factor is shared across select Hittite mixers, but pin assignments and internal MMIC design are unique to the HMC-C035, meaning C-11 compatibility does not imply functional interchangeability.