Analog Devices Inc. HMC260LC3B

Overview

HMC260LC3B from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC double-balanced mixer operating from 14 to 26 GHz RF/LO and DC–8 GHz IF, delivering 10.5 dB typical conversion loss, +20 dBm input IP3, and 40 dB LO-to-RF isolation-ideal for microwave up/downconversion in point-to-point radios and test equipment.

For engineers reviewing the HMC260LC3B datasheet, HMC260LC3B pinout, HMC260LC3B application, or HMC260LC3B equivalent, key selection criteria include its 12-lead 3×3 mm ceramic SMT package, no-DC-bias passive architecture, wide IF bandwidth, and verified performance across –40°C to +85°C with +9 to +15 dBm LO drive.

Technical Context

The HMC260LC3B implements a fundamental-mode passive double-balanced topology using integrated planar baluns to achieve high LO-to-RF and LO-to-IF suppression without external matching. Its monolithic GaAs construction enables stable operation across 14–26 GHz with minimal sensitivity to layout parasitics.

It functions as both upconverter and downconverter with DC-coupled LO, RF, and IF ports, requires no bias circuitry, and maintains specified conversion loss, noise figure (7.5–10.5 dB SSB), and isolation over temperature (–40°C to +85°C) and LO drive (+9 to +15 dBm).

Key Specifications

Pinout & Package

12-lead leadless ceramic SMT package (3×3 mm, 9 mm²), alumina body with gold-over-nickel plating, MSL3 rating, and exposed ground paddle requiring solder connection to PCB RF ground.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC1048LP3E and QPC1006, the HMC260LC3B delivers optimal balance of bandwidth (14–26 GHz), linearity (+20 dBm IP3), and integration (no bias, no matching) for Ka-band infrastructure-making it preferred for fixed wireless access and defense comms where 24 GHz operation and manufacturability are critical.

Availability

HMC260LC3B is available at Aetrix Electronics and suitable for point-to-point radios, test equipment, and military radar sensors requiring stable component supply, RoHS-compliant SMT placement, and guaranteed long-term availability in ceramic packaging.

Supply support for HMC260LC3B 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 portfolio into precision analog and RF solutions for communications, defense, and instrumentation.

The HMC260LC3B belongs to Hittite's legacy GaAs MMIC mixer product line, engineered specifically for broadband microwave infrastructure demanding high isolation, wide IF bandwidth, and surface-mount reliability without external tuning.

FAQ

What is the recommended LO drive level for optimal performance of the HMC260LC3B?

The HMC260LC3B achieves best conversion loss and IP3 performance with LO drive between +11 dBm and +13 dBm. At +13 dBm, typical conversion loss is 10.5 dB and input IP3 reaches +20 dBm. Operation down to +9 dBm is supported but increases conversion loss by ~1.5 dB; exceeding +15 dBm risks compression or reliability degradation. The HMC260LC3B datasheet specifies all electrical characteristics at +13 dBm LO drive unless otherwise noted.

Does the HMC260LC3B require external DC blocking or biasing components?

No, the HMC260LC3B is a passive double-balanced mixer and requires no DC bias or external active components. All ports (LO, RF, IF) are DC-coupled and internally matched to 50 Ω. For IF operation above DC, an external series capacitor may be used-but is not required. The HMC260LC3B eliminates matching networks, baluns, and bias tees, simplifying front-end design and reducing bill-of-materials cost.

What is the thermal management requirement for continuous operation of the HMC260LC3B?

The HMC260LC3B has a thermal resistance of 253 °C/W (junction-to-ground paddle) and maximum channel temperature of 150 °C. At 85 °C ambient, its continuous power dissipation is rated at 260 mW, derating linearly above that temperature. To ensure reliability, the exposed ground paddle must be soldered to a thermally robust PCB ground plane with ≥6 thermal vias (0.3 mm diameter) connecting to internal ground layers. The HMC260LC3B evaluation board (117611) includes heat sink mounting provisions.

Can the HMC260LC3B be used for both upconversion and downconversion?

Yes, the HMC260LC3B is fully bidirectional and functions identically as an upconverter or downconverter across its 14–26 GHz RF/LO range and DC–8 GHz IF bandwidth. Its symmetric double-balanced architecture ensures consistent conversion loss, isolation, and linearity regardless of signal flow direction. System-level validation in both modes is documented in the HMC260LC3B datasheet, including upconverter performance plots at 18 GHz RF and 17 GHz LO.

What package-related handling precautions apply to the HMC260LC3B?

The HMC260LC3B is an ESD-sensitive Class 1A device (HBM) in a ceramic LCC package with gold-over-nickel terminations. It requires strict ESD controls during handling and assembly, including grounded workstations, ionized air, and wrist straps. The package is MSL3 (moisture sensitivity level 3) with a floor life of 168 hours at ≤30°C/60% RH; bake per J-STD-033 is required if exposed beyond that. The exposed ground paddle must be soldered-not pasted-to ensure RF grounding and thermal conduction.