Analog Devices Inc. 106815-HMC441LM1

Overview

HMC441LM1 from Analog Devices is a GaAs PHEMT MMIC medium power amplifier operating from 7 to 15.5 GHz, delivering 15 dB gain, +21.5 dBm saturated output power at 27% PAE with +5 V supply, and 50 Ω input/output matching - used as a linear gain block or LO driver for HMC mixers in point-to-point radio systems.

For engineers reviewing the HMC441LM1 datasheet, HMC441LM1 pinout, HMC441LM1 application, or HMC441LM1 equivalent, key selection criteria include its broadband RF performance across 7–15.5 GHz, gate bias adjustability for gain/power trade-offs, leadless LGA_CAV package compatibility with millimeter-wave PCB assembly, and thermal rating up to +85 °C ambient.

Technical Context

The HMC441LM1 employs a monolithic GaAs PHEMT process to achieve stable gain and return loss across 7–15.5 GHz without external matching components. Its 50 Ω matched I/O enables direct integration into CPWG-based RF signal paths, and optional dual-gate bias (Vgg1/Vgg2) allows dynamic control of DC current, gain, and output power.

Designed for operation with +5 V drain supply and gate voltages ranging from −8 V to 0 V, the amplifier maintains ≤0.02 dB/°C gain variation over temperature and delivers 29–30 dBm OIP3 across its band - supporting high-linearity applications such as VSAT uplink stages and military EW front-ends.

Key Specifications

Pinout & Package

Package: 8-terminal chip array small outline no-lead cavity (LGA_CAV), 5.08 mm × 5.08 mm body, 1.01 mm height, plastic body with gold-plated terminations, exposed ground paddle requiring RF grounding.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar medium-power RF amplifier applications.

Compared with HMC441LP3E and QPA2211, the HMC441LM1 uniquely combines gate-adjustable operation, 175 °C channel temperature rating, and LGA_CAV packaging optimized for millimeter-wave CPWG transitions - making it preferred for thermally demanding, tunable RF designs.

Availability

HMC441LM1 is available at Aetrix Electronics and suitable for point-to-point radios, VSAT terminals, and military EW systems requiring stable component supply across extended temperature ranges and high-frequency performance consistency.

Supply support for HMC441LM1 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 is a global semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for precision signal processing applications.

The HMC441LM1 belongs to the Hittite Microwave (now part of Analog Devices) MMIC amplifier product line, designed specifically for broadband microwave infrastructure requiring high linearity, thermal robustness, and surface-mount compatibility.

FAQ

What is the recommended supply voltage for the HMC441LM1?

The HMC441LM1 is specified for operation at +5 V drain supply (Vdd), with absolute maximum rating of +5.5 V. It remains functional down to +3.0 V, though gain and output power decrease progressively below +5 V - e.g., at +3.3 V, typical Idd drops to 83 mA and Psat reduces by ~2 dB. For full specification compliance, +5 V is required.

Does the HMC441LM1 require external matching components?

No, the HMC441LM1 features fully 50 Ω matched input and output ports across 7–15.5 GHz, eliminating the need for external matching networks. Its internal design integrates all necessary DC blocking and RF matching, allowing direct connection to 50 Ω transmission lines - verified by >13 dB input and >14 dB output return loss in datasheet measurements.

How does gate bias affect performance of the HMC441LM1?

Applying negative voltage to Vgg1 and Vgg2 reduces DC current (Idd), gain, and saturated output power while improving PAE and linearity. At open-circuit gate bias, the HMC441LM1 draws 90–115 mA and delivers 15 dB gain and +21.5 dBm Psat. With −2 V applied, Idd drops to ~60 mA, gain falls to ~12 dB, and Psat decreases to ~+19 dBm - enabling power-sensitive or adaptive RF configurations.

What is the thermal resistance of the HMC441LM1 package?

The HMC441LM1 has a channel-to-ground paddle thermal resistance of 133 °C/W. This value assumes proper soldering of the exposed ground paddle to a thermally robust PCB copper area. With 0.67 W max continuous dissipation at +85 °C case temperature, this thermal resistance supports junction temperatures ≤175 °C - confirmed in Absolute Maximum Ratings and validated via thermal imaging in application notes.

Can the HMC441LM1 be used as an LO driver for HMC mixers?

Yes, the HMC441LM1 is explicitly designated as an LO driver for HMC SMT mixers in its Typical Applications section. Its 50 Ω matched output, broadband 7–15.5 GHz coverage, and +21.5 dBm Psat provide sufficient clean drive level for mixers such as HMC774A and HMC1040, minimizing LO phase noise degradation and ensuring stable conversion gain across temperature.