Analog Devices Inc. HMC774LC3BTR-R5

Overview

HMC774LC3BTR-R5 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC double-balanced passive mixer operating from 7–34 GHz RF/LO and DC–8 GHz IF, delivering +22 dBm input IP3, 35 dB LO/RF isolation, and 10–14 dB conversion loss - ideal for millimeter-wave point-to-point radios and test equipment upconverters/downconverters.

For engineers reviewing the HMC774LC3BTR-R5 datasheet, HMC774LC3BTR-R5 pinout, HMC774LC3BTR-R5 application, or HMC774LC3BTR-R5 equivalent, key selection criteria include its 12-lead 3×3 mm ceramic SMT package, no-DC-bias operation, wide IF bandwidth, and optimized balun-based isolation performance across Ka-band.

Technical Context

The HMC774LC3BTR-R5 is a fundamental-mode passive double-balanced mixer with integrated baluns enabling high LO-to-RF (35 dB) and LO-to-IF (20–40 dB) suppression. It requires no external matching components and operates optimally with LO drive ≥+15 dBm.

Its DC-coupled RF, LO, and IF ports support both upconversion and downconversion in Ka-band systems. The device exhibits stable linearity over temperature: input IP3 remains ≥20 dBm from –40°C to +85°C, and P1dB ranges from 12–13 dBm across frequency and temperature.

Key Specifications

Pinout & Package

12-lead leadless ceramic package (alumina body, gold-over-nickel plating), 3×3 mm footprint, MSL3 rated, with exposed ground paddle requiring PCB thermal via connection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC1048LP3DE and QPC1006, the HMC774LC3BTR-R5 offers the best balance of Ka-band coverage (7–34 GHz), proven 35 dB LO/RF isolation, and compact 3×3 mm footprint - making it optimal for space-constrained, high-isolation millimeter-wave radios where external LO amplification is already available.

Availability

HMC774LC3BTR-R5 is available at Aetrix Electronics and suitable for point-to-point radios, test equipment, and military radar sensors requiring stable component supply, RoHS-compliant packaging, and consistent Ka-band RF performance.

Supply support for HMC774LC3BTR-R5 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 maintains its high-frequency RF portfolio, specializing in GaAs and SiGe MMIC solutions for defense, communications, and instrumentation markets.

The HMC774LC3BTR-R5 belongs to Hittite's legacy GaAs MMIC mixer family, designed specifically for high-isolation, wideband Ka-band transceivers where passive architecture, no-DC-bias operation, and surface-mount manufacturability are critical.

FAQ

What is the recommended LO drive level for optimal performance of the HMC774LC3BTR-R5?

The HMC774LC3BTR-R5 achieves best conversion loss and linearity with LO drive levels of +15 dBm or higher. At +15 dBm, typical conversion loss is 10–11 dB and input IP3 reaches +22 dBm. Lower LO drive increases conversion loss and reduces IP3; operation below +11 dBm is not recommended for linear applications. The HMC774LC3BTR-R5 does not require DC bias, so no additional LO conditioning circuitry is needed beyond a 50 Ω source match.

Can the HMC774LC3BTR-R5 be used for DC-coupled IF operation?

Yes, the HMC774LC3BTR-R5 supports true DC-coupled IF operation on Pin 5. However, the IF port must not source or sink more than ±2 mA of DC current to avoid non-function or permanent damage. For AC-coupled IF applications, a series capacitor sized for the lowest IF frequency of interest should be used. The HMC774LC3BTR-R5's DC–8 GHz IF bandwidth makes it suitable for zero-IF and low-IF receiver architectures.

What is the thermal management requirement for the HMC774LC3BTR-R5 in continuous operation?

The HMC774LC3BTR-R5 has a channel-to-ground thermal resistance of 343 °C/W and a maximum continuous power dissipation of 189 mW at 85 °C ambient. To maintain junction temperature below 150 °C, the exposed ground paddle must be soldered to a multilayer PCB ground plane with ≥6 thermal vias (0.3 mm diameter, spaced ≤1 mm apart). The HMC774LC3BTR-R5's ceramic package and paddle design enable reliable operation in sealed enclosures up to +85 °C ambient.

Does the HMC774LC3BTR-R5 require external matching components?

No, the HMC774LC3BTR-R5 requires no external matching components. All RF, LO, and IF ports are internally matched to 50 Ω and DC-coupled. The device uses optimized on-chip balun structures to achieve 35 dB LO/RF isolation and 20–40 dB LO/IF isolation without external transformers or couplers. This eliminates tuning complexity and improves repeatability in high-volume manufacturing - a key advantage of the HMC774LC3BTR-R5 over discrete mixer solutions.

What are the absolute maximum ratings for RF/IF and LO inputs on the HMC774LC3BTR-R5?

The HMC774LC3BTR-R5 has an absolute maximum RF/IF input power of +21 dBm and LO input power of +27 dBm. Exceeding these limits risks permanent damage. For reliable operation, RF/IF input should remain ≤+15 dBm and LO drive should be maintained between +15 dBm and +17 dBm. The HMC774LC3BTR-R5 is an electrostatic sensitive device (ESD Class 1C); proper handling precautions must be observed during assembly and testing.