Analog Devices Inc. HMC260A

Overview

HMC260A from Analog Devices is a GaAs MMIC double-balanced passive mixer for RF-to-IF downconversion and IF-to-RF upconversion across 10 GHz to 26 GHz, delivering 7.5–8.5 dB typical conversion loss, 18–22 dBm IP3, and dc-to-8 GHz IF bandwidth in a 7-pad bare die (C-7-4) package - deployed in point-to-point radios and military millimeter-wave transceivers.

For engineers reviewing the HMC260A datasheet, HMC260A pinout, HMC260A application, or HMC260A equivalent, key selection criteria include its LO drive requirement (≥13 dBm), absence of DC bias, 40 dB LO-to-RF isolation, and compatibility with microstrip-based 50 Ω RF/LO routing on alumina substrates.

Technical Context

The HMC260A implements a double-balanced topology using integrated balun structures to achieve high LO-to-RF (40 dB typ) and LO-to-IF (34–37 dB typ) suppression. Its passive architecture eliminates DC biasing and enables operation from dc to 8 GHz at the IF port without external components.

It supports both upconversion and downconversion modes across two overlapping RF bands: 10–18 GHz and 18–26 GHz, with performance metrics (P1dB, IP3, noise figure) specified separately per band under 13 dBm LO drive and 25°C ambient conditions.

Key Specifications

Pinout & Package

Package: 7-pad bare die (C-7-4), dimensions 0.94 mm × 0.59 mm × 0.102 mm, back-metallized for eutectic or conductive epoxy die attach per MIL-spec mounting guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC260A, HMC1048LP3E offers lower loss below 20 GHz but lacks 26 GHz capability and requires more PCB area, while QPC1006 trades passive simplicity for active gain and higher power handling - making HMC260A optimal for compact, bias-free, full 10–26 GHz mmWave signal translation.

Availability

HMC260A is available at Aetrix Electronics and suitable for point-to-point radios, military radar front-ends, and VSAT terminals requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for HMC260A 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 HMC260A belongs to Analog Devices' Hittite Microwave MMIC product line, engineered specifically for millimeter-wave wireless infrastructure, aerospace, and instrumentation applications demanding broadband, passive, and thermally robust mixing performance.

FAQ

What is the recommended LO drive level for optimal performance of the HMC260A?

The HMC260A achieves specified conversion loss, IP3, and isolation with an LO drive of 13 dBm or higher across its full 10–26 GHz range. Performance degrades below this level - for example, conversion loss increases by ~1.5 dB at 11 dBm LO drive. The absolute maximum LO input power is 27 dBm, but sustained operation above 15 dBm may accelerate aging. Always verify LO drive with calibrated source and directional coupler in final system tuning.

Can the HMC260A operate as both an upconverter and downconverter?

Yes, the HMC260A is a bidirectional double-balanced mixer capable of both upconversion (IF → RF) and downconversion (RF → IF) across 10–26 GHz. In upconversion mode, it translates dc–8 GHz IF signals to RF outputs between 10–26 GHz using the same LO and port definitions. Measured performance (e.g., IP3, P1dB) is symmetric and documented for both modes in the datasheet Figures 16–21.

Is external matching required when using the HMC260A?

No external matching components are required. The HMC260A integrates optimized balun structures and presents 50 Ω impedance at RF and LO ports, and dc-coupled 50 Ω at IF. However, proper RF layout is essential: use 50 Ω microstrip lines on 0.127 mm alumina, keep bond wires <0.31 mm, and ensure solid ground plane connection to all four bottom GND pads (pins 1,4,5,7) to maintain specified return loss and isolation.

What is the maximum allowable current at the IF port of the HMC260A?

The IF port of the HMC260A must not source or sink more than ±3 mA of current. Exceeding this limit causes functional failure or permanent damage. This constraint applies only when operating to dc; for ac-coupled IF paths (e.g., blocking capacitor), current flow is negligible. The 3 mA limit is defined in Absolute Maximum Ratings Table 3 and verified under dc bias test conditions in the datasheet.

How does temperature affect the conversion loss of the HMC260A?

Conversion loss of the HMC260A varies by ≤0.8 dB over −40°C to +85°C at fixed RF/LO frequencies and 13 dBm LO drive, as shown in Figure 7 and Figure 16. At 18 GHz RF and 13 dBm LO, loss is 7.5 dB at +25°C, 8.1 dB at −40°C, and 8.2 dB at +85°C. This stability makes HMC260A suitable for uncooled outdoor mmWave radios where thermal drift must remain within system noise margin.