Analog Devices Inc. 105173-HMC415LP3

Overview

HMC415LP3 from Analog Devices (formerly Hittite Microwave) is a GaAs InGaP HBT MMIC power amplifier optimized for 4.9–5.9 GHz WLAN and UNII/ISM radio applications. It delivers 20 dB small-signal gain, +26 dBm saturated output power, and 34% power-added efficiency at +3 V supply, with integrated power-down control (Vpd) and 3.7% EVM at +15 dBm OFDM output for 802.11a compliance.

For engineers reviewing the HMC415LP3 datasheet, HMC415LP3 pinout, HMC415LP3 application, or HMC415LP3 equivalent, key selection criteria include its 5.2 GHz band performance, thermal management via exposed ground paddle, low external component count, and RF output stage biasing through dual RFOUT pins - critical for access point and high-linearity 5 GHz transceiver designs.

Technical Context

The HMC415LP3 employs a two-stage GaAs InGaP HBT architecture with DC-coupled interstage matching and on-chip bias networks. Its input (Pin 4) is AC-coupled and 50 Ω matched across 5.0–6.0 GHz, while RF output (Pins 10 & 11) provides both RF signal path and DC bias feed to the final stage.

Power control is implemented via Vpd (Pin 14), enabling full power-down (Icc < 2 µA) or analog output power adjustment. Thermal performance relies on soldering the exposed base slug to PCB ground with vias, achieving 59 °C/W junction-to-paddle thermal resistance under continuous operation at −40 to +85 °C ambient.

Key Specifications

Pinout & Package

Package: 16-lead leadless surface-mount package (LP3) with exposed copper alloy ground paddle; RoHS-compliant version HMC415LP3E uses matte Sn finish; MSL1 rating with 260 °C peak reflow.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 5 GHz power amplifier applications.

Compared with QPA4501 and SKY65167-374LF, the HMC415LP3 uniquely balances +3 V operation, integrated Vpd control, and 802.11a linearity in a thermally robust LP3 package - making it optimal for mid-power, thermally constrained 5 GHz infrastructure designs requiring rapid power-state transitions.

Availability

HMC415LP3 is available at Aetrix Electronics and suitable for 802.11a access points, UNII band radios, and ISM 5.8 GHz transceivers requiring stable component supply, consistent RF performance across temperature, and long-term lifecycle support.

Supply support for HMC415LP3 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 maintains its high-frequency RF portfolio, specializing in GaAs, GaN, and SiGe MMICs for defense, communications, and test equipment.

The HMC415LP3 belongs to Hittite's legacy linear & power amplifier product line, designed specifically for high-efficiency, high-linearity 5 GHz WLAN and broadband radio infrastructure applications.

FAQ

What is the absolute maximum RF input power rating for the HMC415LP3?

The HMC415LP3 has an absolute maximum RF input power rating of +13 dBm when Vcc = Vpd = +3.0 Vdc. Exceeding this level risks permanent damage to the GaAs HBT input stage. This rating is independent of output load conditions and must be enforced using input limiting or attenuators in high-power receive paths or TDD architectures where transmit leakage may occur.

Does the HMC415LP3 require external bias circuitry?

No, the HMC415LP3 integrates on-die bias networks for both amplifier stages. Only three external components are mandatory: a 330 pF bypass capacitor on Pin 1 (Vcc), a 0.5 pF capacitor on Pin 5 (GND), and a 7.0 pF capacitor on Pin 6 (GND). No external current sources, resistors, or active bias controllers are needed - simplifying layout and improving repeatability across production units.

How does the Vpd pin function in the HMC415LP3, and what voltage range is safe?

The Vpd pin (Pin 14) controls amplifier enable/disable and output power scaling. At 3.0 V, HMC415LP3 operates at full gain and +26 dBm Psat with 285 mA Icc. Reducing Vpd lowers Icc and output power; at 0 V, Icc drops to <2 µA for full power-down. The absolute maximum Vpd is +3.5 Vdc - applying higher voltage risks irreversible degradation of the control transistor.

What thermal design practices are required for reliable HMC415LP3 operation?

Reliable HMC415LP3 operation requires soldering the exposed ground paddle directly to a solid PCB ground plane using ≥8 thermal vias (0.3 mm diameter, spaced ≤1 mm apart) beneath the package. The thermal resistance is specified as 59 °C/W junction-to-paddle; without proper paddle connection, junction temperature can exceed 150 °C even at 85 °C ambient, triggering premature failure.

Is the HMC415LP3 pin-compatible with the HMC415LP3E variant?

Yes, the HMC415LP3 and HMC415LP3E share identical pinout, footprint, and electrical specifications. The only differences are RoHS compliance (matte Sn finish vs. Sn/Pb), MSL1 reflow profile (260 °C peak vs. 235 °C), and marking - making them drop-in replacements in new designs and backward-compatible for legacy board reuse.