Analog Devices Inc. HMC547ALC3TR

Overview

HMC547ALC3TR from Analog Devices is a GaAs pHEMT SPDT non-reflective switch in a 3×3 mm ceramic SMT package, operating from DC to 28 GHz with 45 dB isolation at 10 GHz, 1.9 dB insertion loss at 10 GHz, and 6 ns switching time-used in military EW/ECM front-ends and broadband test instrumentation.

For engineers reviewing the HMC547ALC3TR datasheet, HMC547ALC3TR pinout, HMC547ALC3TR application, or HMC547ALC3TR equivalent, key selection criteria include absorptive termination behavior, -5/0 V complementary logic control, RF port DC coupling requiring external blocking capacitors, and MSL3 reflow compatibility for high-frequency PCB assembly.

Technical Context

This MMIC switch implements a non-reflective (absorptive) topology with integrated 50 Ω terminations on both RF1 and RF2 paths when off, ensuring minimal signal reflection into the RFC port across DC–28 GHz. Its GaAs pHEMT process enables fast switching (t_ON/t_OFF = 6 ns) without bias supply-only dual negative control lines (A/B) at -5 V/0 V are required.

The device features three RF ports (RFC, RF1, RF2), all DC-coupled and impedance-matched to 50 Ω, with N/C and GND pins strategically placed for RF grounding integrity. Thermal design accounts for two dissipation paths: 0.55 W max in insertion-loss path (θ_JA = 118 °C/W) and 0.32 W in terminated path (θ_JA = 200 °C/W).

Key Specifications

Pinout & Package

16-lead ceramic leadless surface-mount package (3×3 mm, alumina body, gold-over-nickel plating, MSL3). Exposed ground paddle must be soldered to PCB RF ground per Analog Devices layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC647LP3E and QM11036, the HMC547ALC3TR delivers superior Ka-band isolation and true non-reflective operation-making it the only choice for military ECM and millimeter-wave ATE where signal integrity and termination stability are non-negotiable.

Availability

HMC547ALC3TR is available at Aetrix Electronics and suitable for fiber optic transceivers, military radar T/R modules, and automated test equipment requiring stable component supply across extended temperature ranges (-40 °C to +85 °C) and high-reliability RF performance.

Supply support for HMC547ALC3TR 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 defense markets since 1965.

The HMC547ALC3TR belongs to Analog Devices' Hittite Microwave MMIC switch product line, engineered specifically for broadband, high-isolation, non-reflective RF signal routing in defense EW, radar, and test instrumentation.

FAQ

What is the maximum RF input power rating for HMC547ALC3TR?

The HMC547ALC3TR supports +29 dBm continuous RF input power when control voltage is set to -5 V. At hot-switch conditions (state change under RF load), the limit drops to +23 dBm. These ratings assume proper thermal management-specifically, soldering all ground leads and the exposed paddle to a low-thermal-resistance PCB ground plane per the datasheet layout guidance.

Does HMC547ALC3TR require an external bias supply?

No, the HMC547ALC3TR operates without any external bias supply. It uses only two complementary negative control voltages (A and B pins at -5 V or 0 V) to select the RF path. This eliminates the need for dedicated gate or drain bias circuitry, reducing bill-of-materials count and board space in compact RF modules.

Can HMC547ALC3TR be used in DC-coupled applications?

Yes, all RF ports (RFC, RF1, RF2) of the HMC547ALC3TR are DC-coupled and internally matched to 50 Ω. However, external DC blocking capacitors must be added if the connected RF line carries non-zero DC potential-otherwise, unintended current paths or bias disruption may occur. The device itself does not provide internal DC blocking.

What is the meaning of "non-reflective" in HMC547ALC3TR's description?

"Non-reflective" means the HMC547ALC3TR terminates the inactive RF port (e.g., RF2 when RFC→RF1 is selected) with a well-matched 50 Ω load. This prevents signal reflection back toward the RFC port, preserving source impedance stability and minimizing standing waves-critical in cascaded amplifier/filter chains and sensitive receiver front-ends.

Is HMC547ALC3TR RoHS compliant and MSL-rated?

Yes, the HMC547ALC3TR is RoHS compliant and rated MSL3 per JEDEC J-STD-020. Its peak reflow temperature tolerance is 260 °C, and the ceramic package uses gold-over-nickel plating. Full compliance documentation-including material declarations and test reports-is available directly from Analog Devices upon request.