Analog Devices Inc. HMC170C8

Overview

HMC170C8 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC double-balanced mixer in a non-hermetic ceramic SMT package, operating from 2.5–4.0 GHz RF/LO and DC–2 GHz IF, with 9 dB typical conversion loss, 45 dB LO-to-RF isolation, and +18 dBm input IP3 - used in microwave point-to-point radios, radar receivers, and VSAT up/downconverters.

For engineers reviewing the HMC170C8 datasheet, HMC170C8 pinout, HMC170C8 application, or HMC170C8 equivalent, key selection criteria include its passive diode/balun architecture, no DC bias requirement, surface-mount compatibility, high LO/RF isolation, and suitability for high-dynamic-range RF front-ends requiring stable conversion performance across 2.5–4 GHz.

Technical Context

The HMC170C8 implements a passive GaAs MMIC double-balanced topology using integrated baluns to achieve high port-to-port isolation and excellent amplitude/phase balance. Its operation requires no external DC bias and relies on LO drive (typically +13 dBm) to enable mixing between RF and IF bands.

It delivers broadband RF/LO coverage (2.5–4.0 GHz), wide IF bandwidth (DC–2 GHz), and maintains low noise figure (9 dB typ., equal to conversion loss), making it suitable for both upconversion and downconversion in fixed-frequency microwave systems where size, repeatability, and linearity are critical.

Key Specifications

Pinout & Package

Package: 8-lead non-hermetic ceramic SMT (dimensions per outline drawing; white alumina body, gold-plated copper leads and paddle; ground leads and paddle must be soldered to PCB RF ground).

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC170C8, HMC170C8G offers identical RF performance with improved plating durability, while QH3012 trades 1.5 dB conversion loss and 3 dB IP3 for broader 2–6 GHz coverage - making HMC170C8 optimal for fixed 2.5–4 GHz C-band systems demanding best-in-class linearity and low loss.

Availability

HMC170C8 is available at Aetrix Electronics and suitable for microwave point-to-point radios, radar receivers, and VSAT outdoor units requiring stable component supply and proven field reliability.

Supply support for HMC170C8 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, Inc. is a global leader in high-performance analog, mixed-signal, and RF ICs, serving communications, industrial, and aerospace markets since 1965.

The HMC170C8 belongs to Analog Devices' legacy Hittite Microwave RF mixer product line, engineered specifically for high-isolation, low-loss, surface-mount microwave conversion in C-band infrastructure equipment.

FAQ

What is the recommended LO drive level for the HMC170C8?

The HMC170C8 is characterized at +13 dBm LO drive, delivering optimal conversion loss (9 dB), isolation (45 dB LO-to-RF), and linearity (+18 dBm IP3). Operation below +10 dBm increases conversion loss; above +15 dBm yields diminishing returns and risks accelerated aging. Always maintain ±0.5 dB LO power stability for repeatable performance in the HMC170C8.

Does the HMC170C8 require DC bias or external components to operate?

No, the HMC170C8 is a passive double-balanced mixer and requires no DC bias voltage or current. It operates solely with LO drive and RF/IF signal paths. No external baluns, bias tees, or matching networks are needed - only proper 50 Ω terminations and grounding of all ground pins and the exposed paddle per the HMC170C8 datasheet layout guidelines.

What is the maximum RF input power the HMC170C8 can handle?

The HMC170C8 has an absolute maximum RF/IF input rating of +13 dBm. For linear operation, the 1 dB compression point is +10 dBm (typ.), meaning sustained input above this level causes measurable gain compression. To preserve dynamic range and avoid distortion, keep RF input ≤ +7 dBm in high-fidelity applications - consistent with the HMC170C8's specified +18 dBm input IP3.

Is the HMC170C8 still in production or obsolete?

The HMC170C8 is marked "OBSOLETE" in official documentation, but remains available through authorized distributors and Aetrix Electronics with full traceability and remaining factory stock. Analog Devices continues to support it with datasheets, S-parameter files, and application notes. Lifecycle notifications and last-time-buy guidance for the HMC170C8 are provided upon request.

How does the HMC170C8 compare to active mixers in terms of noise and linearity?

The HMC170C8 has a noise figure equal to its conversion loss (9 dB typ.), unlike active mixers that add transistor noise. Its +18 dBm input IP3 exceeds most active counterparts in the same frequency range, enabling superior handling of strong interferers. However, it lacks gain - so low-noise amplifiers must precede it, whereas active mixers may integrate LNA functionality. This makes the HMC170C8 ideal where linearity and simplicity outweigh gain requirements.