Analog Devices Inc. HMC553LC3BTR

Overview

HMC553LC3BTR from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC double-balanced passive mixer operating from 7 to 14 GHz RF/LO and DC–5 GHz IF, delivering 7 dB typical conversion loss, 50 dB LO-to-RF isolation, and +22 dBm input IP3 - used in microwave up/downconversion for point-to-point radios and test equipment.

For engineers reviewing the HMC553LC3BTR datasheet, HMC553LC3BTR pinout, HMC553LC3BTR application, or HMC553LC3BTR equivalent, key selection criteria include its 3×3 mm ceramic SMT package, LO drive sensitivity down to +9 dBm, robust Class 1C ESD rating, and absence of external matching components.

Technical Context

The HMC553LC3BTR implements a passive double-balanced topology using integrated balun structures to achieve high LO-to-RF (50 dB typ.) and LO-to-IF (34 dB typ.) isolation across 7–14 GHz. Its GaAs MESFET process enables DC-coupled 50 Ω ports without external biasing or matching networks.

It operates as either upconverter or downconverter with fixed IF bandwidth (DC–5 GHz), supports LO drive from +9 to +15 dBm, and maintains stable conversion gain and IP3 over –40°C to +85°C ambient temperature.

Key Specifications

Pinout & Package

12-lead leadless ceramic package (alumina body, gold-over-nickel plating), 3×3 mm outline, MSL3, with 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 passive double-balanced mixer applications.

Compared with HMC1048LP3E and QH3312, the HMC553LC3BTR delivers the best balance of conversion loss, LO-to-RF isolation, and Ku-band coverage in a compact 3×3 mm ceramic package - making it optimal for fixed-frequency 7–14 GHz radio and instrumentation designs.

Availability

HMC553LC3BTR is available at Aetrix Electronics and suitable for point-to-point radios, test equipment, and military communications requiring stable component supply, consistent RF performance, and long-term obsolescence management.

Supply support for HMC553LC3BTR 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 IC portfolio into precision analog and RF solutions for communications, defense, and instrumentation markets.

The HMC553LC3BTR belongs to Hittite's legacy GaAs MMIC mixer product line, designed specifically for high-isolation, low-loss frequency translation in Ku-band wireless infrastructure and test systems.

FAQ

What is the recommended LO drive level for optimal performance of the HMC553LC3BTR?

The HMC553LC3BTR achieves best conversion loss (7 dB typ.) and IP3 (+22 dBm) at +13 dBm LO drive. It remains functional down to +9 dBm, though conversion loss increases by ~1.5 dB. Operation above +15 dBm exceeds absolute maximum rating and risks permanent damage. The HMC553LC3BTR does not require external LO amplification in most Ku-band transceiver designs.

Can the HMC553LC3BTR be used for zero-IF (direct-conversion) receiver applications?

Yes, the HMC553LC3BTR supports zero-IF operation due to its DC–5 GHz IF bandwidth and DC-coupled IF port. However, the IF output must not source or sink more than ±2 mA DC current. For true zero-IF, external baseband amplification and DC offset cancellation circuitry are required - the HMC553LC3BTR itself provides only the RF-to-baseband translation function.

Does the HMC553LC3BTR require external matching components or bias tees?

No. The HMC553LC3BTR features fully 50 Ω matched, DC-coupled RF, LO, and IF ports fabricated in GaAs MESFET technology. No external baluns, bias tees, DC blocks, or impedance-matching networks are needed - simplifying layout and reducing bill-of-materials cost compared to discrete mixer solutions.

What is the thermal management requirement for continuous operation of the HMC553LC3BTR?

The HMC553LC3BTR has a thermal resistance of 364 °C/W (channel-to-ground paddle) and max continuous power dissipation of 178 mW at 85 °C case temperature. To maintain safe junction temperature (<150 °C), the exposed ground paddle must be soldered to a thermally robust PCB ground plane with multiple vias. Derating is 2.75 mW/°C above 85 °C ambient.

Is the HMC553LC3BTR pin-compatible with other Hittite mixer variants like HMC554LC3B?

No. Although both use the same 3×3 mm ceramic package, the HMC553LC3BTR and HMC554LC3B have different pin functions and internal topologies - the latter is a broadband active mixer with integrated LO amplifier. Substituting them requires PCB redesign. Always verify pinout and electrical interface compatibility using the official HMC553LC3BTR datasheet before design-in.