Analog Devices Inc. HMC284AMS8GTR

Overview

HMC284AMS8GTR from Analog Devices is a non-reflective SPDT RF switch optimized for DC–3.5 GHz operation, delivering 0.7 dB typical insertion loss at 3.5 GHz, >45 dB isolation between RF1/RF2 paths, and +29 dBm input power handling at 3.5 GHz. It serves as a signal path selector in cellular base station front-ends, ISM band transceivers, and wireless local loop systems.

For engineers reviewing the HMC284AMS8GTR datasheet, HMC284AMS8GTR pinout, HMC284AMS8GTR application, or HMC284AMS8GTR equivalent, key selection criteria include its 0/+5 V positive control logic, MSOP8G grounded-base package, non-reflective OFF-state termination, and verified performance across -40°C to +85°C industrial temperature range.

Technical Context

The HMC284AMS8GTR implements a monolithic GaAs pHEMT-based SPDT architecture with integrated DC blocking and on-chip termination for both RF1 and RF2 ports in the OFF state. Its control interface accepts TTL/CMOS-compatible 0/+5 V inputs with sub-1 µA leakage current, enabling direct drive without level-shifting circuitry.

Thermal design relies on a thermally enhanced MSOP8G package with exposed paddle soldered to PCB ground, achieving 130 °C/W thermal resistance along the insertion loss path. The device maintains stable RF performance under hot-switch conditions up to +18 dBm and supports fast switching with 5 ns rise/fall times and 20 ns ON/OFF delays.

Key Specifications

Pinout & Package

Package: MSOP8G (8-lead grounded-base mini small outline package) with exposed thermal paddle requiring solder connection to PCB RF ground plane per Analog Devices layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC547LP3E and QM11036, the HMC284AMS8GTR delivers optimal balance of 3.5 GHz performance, 0/+5 V compatibility, and compact MSOP8G integration-making it preferred for industrial-grade wireless infrastructure where proven reliability and thermal robustness are prioritized over maximum bandwidth or lowest cost.

Availability

HMC284AMS8GTR is available at Aetrix Electronics and suitable for cellular base stations, 2.4 GHz ISM transceivers, and 3.5 GHz wireless local loop systems requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for HMC284AMS8GTR 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 communications, industrial, automotive, and healthcare markets with precision signal processing solutions.

The HMC284AMS8GTR belongs to Analog Devices' Hittite Microwave RF Switch product line, engineered specifically for high-isolation, low-loss signal routing in wireless infrastructure and test instrumentation where thermal stability and non-reflective behavior are mandatory.

FAQ

What is the recommended DC blocking capacitor value for HMC284AMS8GTR RF ports?

The HMC284AMS8GTR requires external DC blocking capacitors at RFC, RF1, and RF2 ports. A 100 pF, 0402-size capacitor is specified in the official evaluation board (PCB #107821) and supports operation down to ~50 MHz. Lower values extend upper frequency response but reduce low-end cutoff; higher values improve low-frequency passband at the expense of size and parasitic inductance. Always verify impedance match with vector network analyzer.

Does HMC284AMS8GTR require a separate Vdd supply?

No, the HMC284AMS8GTR does not require a Vdd supply. It operates solely from the 0/+5 V control signals applied to pins A and B. No external power rail is needed-the device draws negligible DC current (<1 µA per control pin) and derives all bias internally from the control inputs. This simplifies system-level power architecture and eliminates need for dedicated LDOs or filtering.

Can HMC284AMS8GTR be used in hot-switch applications?

Yes, the HMC284AMS8GTR is rated for hot-switch operation up to +18 dBm RF input power with control voltages at 0/+5 V. This capability is validated per Analog Devices' absolute maximum ratings and enables use in TDD systems where RF signal remains present during path reconfiguration. Exceeding +18 dBm during switching may cause accelerated degradation; always limit hot-switch power to this threshold unless using elevated control voltages (e.g., 0/+7 V) per datasheet guidance.

What is the ESD sensitivity classification for HMC284AMS8GTR?

The HMC284AMS8GTR is classified as Class 1A per Human Body Model (HBM) ESD testing, indicating sensitivity to discharges as low as 250 V. Handling requires strict adherence to ESD-safe practices: grounded wrist straps, conductive foam storage, ionized air environments, and avoidance of direct pin contact. The device's exposed paddle and fine-pitch leads increase vulnerability-never place bare HMC284AMS8GTR on ungrounded surfaces or handle with ungloved fingers.

How should the thermal paddle of HMC284AMS8GTR be connected on the PCB?

The exposed thermal paddle of the HMC284AMS8GTR must be soldered to a solid, low-impedance RF ground plane on the PCB using a grid of ≥ nine 0.3 mm diameter thermal vias spaced ≤ 1 mm apart beneath the paddle. Per Analog Devices' layout notes, all eight perimeter ground pins and the paddle must connect to the same ground net. Failure to properly solder the paddle results in thermal runaway above +20 dBm and degraded isolation due to ground inductance.