Analog Devices Inc. HMC-MDB277-SX

Overview

HMC-MDB277-SX from Analog Devices is a GaAs MMIC passive double-balanced mixer die operating at 70–90 GHz RF/LO and DC–18 GHz IF, with 12 dB typical conversion loss, +14 dBm LO drive requirement, and 1.55 × 1.4 × 0.1 mm die size-designed for millimeter-wave up/downconversion in E-band radios and automotive radar front-ends.

For engineers reviewing the HMC-MDB277-SX datasheet, HMC-MDB277-SX pinout, HMC-MDB277-SX application, or HMC-MDB277-SX equivalent, key selection criteria include its fundamental mixing architecture, DC-coupled 50 Ω matched ports (IF/RF/LO), wide IF bandwidth, low-profile bare-die form factor, and compatibility with thermosonic wire bonding and eutectic die attach in MCM/hybrid assemblies.

Technical Context

The HMC-MDB277-SX implements a passive double-balanced topology using GaAs HBT Schottky diode technology, enabling bidirectional operation as both upconverter and downconverter without DC bias. Its three DC-coupled 50 Ω ports-IF, RF, and LO-are fully passivated and Ti/Au metallized for reliability under RF probing and hybrid integration.

Designed for millimeter-wave systems, it operates across the full 70–90 GHz band with measured conversion loss of 12 dB at 10 GHz IF and +14 dBm LO drive, while supporting storage from –65 °C to +150 °C and operation from –55 °C to +85 °C-meeting MIL-STD-883 Method 2010, Condition B inspection standards.

Key Specifications

Pinout & Package

Package: Bare die in GP-2 gel pack; 1.55 × 1.4 × 0.1 mm GaAs MMIC with Ti/Au metallization, backside grounded, gold bond pads (0.004″ square), no encapsulation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC-MDB277-SX, HMC-MDB278-SX extends upper-frequency coverage at higher LO power, while QPC1006 trades passive simplicity for active gain-making HMC-MDB277-SX optimal for low-noise, zero-bias, high-isolation E-band downconversion where power efficiency and layout simplicity are critical.

Availability

HMC-MDB277-SX is available at Aetrix Electronics and suitable for short-haul E-band radios, automotive radar transceivers, and millimeter-wave test equipment requiring stable component supply, traceable die-level sourcing, and long-term hybrid assembly continuity.

Supply support for HMC-MDB277-SX 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, Inc. is a global leader in high-performance analog, mixed-signal, and RF ICs, serving precision instrumentation, communications, and aerospace markets since 1965.

The HMC-MDB277-SX belongs to Analog Devices' Hittite Microwave MMIC mixer product line, engineered specifically for millimeter-wave infrastructure and sensing applications demanding repeatable bare-die RF performance, high isolation, and hybrid integration readiness.

FAQ

What is the recommended LO drive level for optimal performance of the HMC-MDB277-SX?

The HMC-MDB277-SX is characterized at +14 dBm LO drive, delivering 12 dB typical conversion loss and maximum LO-to-RF/IF isolation. Operating below +14 dBm increases conversion loss and degrades intermodulation performance; exceeding +20 dBm risks permanent damage per absolute maximum ratings. System designs must ensure stable +14 dBm ±0.5 dB delivery to the LO pad using appropriate amplification and filtering.

Does the HMC-MDB277-SX require DC bias or external power?

No, the HMC-MDB277-SX is a fully passive double-balanced mixer and requires no DC bias or external power supply. All three ports (IF, RF, LO) are DC-coupled and internally matched to 50 Ω. Its GaAs HBT Schottky diode topology enables operation solely from RF and LO signal energy-simplifying front-end design and eliminating bias network complexity in the HMC-MDB277-SX implementation.

What mounting methods are qualified for the HMC-MDB277-SX die?

The HMC-MDB277-SX supports eutectic die attach using 80/20 AuSn preforms (255–290 °C tool temperature) or electrically conductive epoxy curing per manufacturer schedule. Its backside is Ti/Au metallized and grounded, enabling direct attachment to RF ground planes on alumina substrates. Mounting must maintain coplanarity-especially on 10-mil substrates-using molybdenum heat spreaders per Analog Devices' Application Note AN-1112 to preserve thermal and electrical integrity of the HMC-MDB277-SX.

Can the HMC-MDB277-SX be used for both upconversion and downconversion?

Yes, the HMC-MDB277-SX is bidirectional by design: it functions identically as an upconverter (IF → RF) or downconverter (RF → IF) due to its symmetric passive double-balanced topology. The same 12 dB conversion loss, +14 dBm LO drive, and DC–18 GHz IF bandwidth apply in either mode. Port labeling (IF/RF/LO) defines signal flow direction in circuit layout, but the HMC-MDB277-SX die itself imposes no functional asymmetry between IF and RF paths.

What is the maximum allowable transient voltage on the HMC-MDB277-SX bond pads?

The HMC-MDB277-SX is an electrostatic-sensitive device (ESD) rated per Class 1B HBM (Human Body Model). While absolute maximum ratings do not specify transient voltage limits, Analog Devices mandates suppression of instrument and bias supply transients during operation. Shielded cables, current-limited bias supplies, and transient-voltage-suppression circuits must be employed-particularly on the LO port-to prevent irreversible junction damage. Handling and probing of the HMC-MDB277-SX must follow strict ESD protocols per datasheet Section 4.