Analog Devices Inc. HMC329LC3BTR-R5

Overview

HMC329LC3BTR-R5 from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC double-balanced passive mixer operating from 24–32 GHz RF/LO and DC–8 GHz IF, delivering 12.5 dB typical conversion loss, +18 dBm input IP3, and 38 dB LO/RF isolation in a 12-lead 3×3 mm ceramic SMT package. It functions as upconverter or downconverter in millimeter-wave radios without external matching or DC bias.

For engineers reviewing the HMC329LC3BTR-R5 datasheet, HMC329LC3BTR-R5 pinout, HMC329LC3BTR-R5 application, or HMC329LC3BTR-R5 equivalent, key selection criteria include its 24–32 GHz fundamental mixing capability, Class 1B ESD robustness, 50 Ω DC-coupled LO/RF/IF ports, and compatibility with surface-mount manufacturing for high-frequency wireless infrastructure.

Technical Context

The HMC329LC3BTR-R5 implements a passive double-balanced architecture using integrated baluns to achieve high LO-to-RF and LO-to-IF suppression-38 dB and 40 dB typical-enabling clean signal translation in dense spectral environments. Its fundamental mixing operation eliminates subharmonic LO drive requirements and supports wide IF bandwidth down to DC.

Designed for operation with LO drive ≥+9 dBm (optimal at +13 dBm), the device delivers stable conversion gain across –40°C to +85°C and maintains >20 dB RF-to-IF isolation. The absence of DC bias simplifies system power design while the 12-lead ceramic package ensures thermal stability and repeatable RF performance at Ka-band frequencies.

Key Specifications

Pinout & Package

12-lead leadless ceramic SMT package (3 × 3 × 0.9 mm), alumina body with gold-over-nickel plating, MSL Level 3, ground paddle soldered to PCB RF ground per datasheet requirement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC329LC3BTR-R5, HMC1048LP3E trades bandwidth and isolation for compactness, while QM11024 offers higher power handling at the cost of linearity and isolation-making HMC329LC3BTR-R5 optimal for balanced Ka-band performance where DC-coupled IF and robust ESD are mandatory.

Availability

HMC329LC3BTR-R5 is available at Aetrix Electronics and suitable for point-to-point radios, VSAT terminals, and millimeter-wave test equipment requiring stable component supply, RoHS-compliant SMT packaging, and guaranteed long-term availability for industrial and defense programs.

Supply support for HMC329LC3BTR-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 integrates its high-frequency RF portfolio into ADI's broader signal chain solutions, emphasizing precision, speed, and reliability in wireless, defense, and instrumentation markets.

The HMC329LC3BTR-R5 belongs to Hittite's legacy GaAs MMIC mixer family, engineered specifically for fundamental Ka-band mixing in infrastructure-grade wireless systems where passive architecture, wide IF bandwidth, and manufacturability are critical.

FAQ

What is the recommended LO drive level for optimal performance of the HMC329LC3BTR-R5?

The HMC329LC3BTR-R5 achieves best conversion loss and linearity at +13 dBm LO drive, with functional operation from +9 dBm to +15 dBm. Driving below +9 dBm increases conversion loss and degrades IP3; exceeding +15 dBm risks compression and potential damage. All electrical specs in the datasheet assume +13 dBm LO unless otherwise noted.

Does the HMC329LC3BTR-R5 require external DC blocking capacitors on its ports?

The HMC329LC3BTR-R5 has DC-coupled LO, RF, and IF ports and does not require external DC blocking capacitors for standard operation. However, if DC response is unwanted on the IF port, a series capacitor sized for the target IF band (e.g., 100 pF for 1–8 GHz) must be added externally-per datasheet guidance for IF port use.

Can the HMC329LC3BTR-R5 be used as both an upconverter and downconverter?

Yes, the HMC329LC3BTR-R5 is bidirectional: it operates as either an upconverter (IF→RF) or downconverter (RF→IF) across its full 24–32 GHz RF/LO and DC–8 GHz IF ranges. Its double-balanced passive architecture imposes no directional limitation, and all published specs apply equally to both configurations.

What is the thermal resistance and maximum channel temperature rating of the HMC329LC3BTR-R5?

The HMC329LC3BTR-R5 has a junction-to-ground-paddle thermal resistance of 170 °C/W and a maximum channel temperature rating of 150 °C. Continuous power dissipation is rated at 382 mW at 85 °C ambient, derating linearly by 5.88 mW/°C above that temperature-requiring proper PCB ground paddle soldering and thermal via implementation.

Is the HMC329LC3BTR-R5 pin-compatible with other Hittite mixer variants like the HMC329LC3?

The HMC329LC3BTR-R5 shares identical pinout, package dimensions, and terminal functions with the non-tray version HMC329LC3, differing only in tape-and-reel packaging (R5 = 500-piece reel). No PCB layout changes are needed when substituting between these variants; both require identical grounding and RF layout practices per the datasheet.