Analog Devices Inc. 129787-HMC902LP3E

Overview

HMC902LP3E from Analog Devices is a GaAs pHEMT MMIC low noise amplifier operating from 5 GHz to 11 GHz, delivering 19.5 dB small-signal gain, 1.8 dB noise figure, and 28 dBm output IP3 at 3.5 V/80 mA. It serves as an LNA or LO driver in microwave radios and C-band VSAT systems with fully 50 Ω matched, DC-blocked RF ports.

For engineers reviewing the HMC902LP3E datasheet, HMC902LP3E pinout, HMC902LP3E application, or HMC902LP3E equivalent, this page provides verified functional role, bias control options (VGG1/VGG2), thermal limits (−40°C to +85°C), exposed pad grounding requirements, and self-biased operation details critical for RF front-end design.

Technical Context

The HMC902LP3E employs a two-stage GaAs pHEMT MMIC architecture optimized for broadband low-noise amplification across 5–11 GHz. Its input and output are internally DC-blocked and impedance-matched to 50 Ω, enabling direct insertion into 50 Ω systems without external matching networks.

It supports both self-biased operation (VGG1/VGG2 open) and optional gate voltage control (−2 V to +0.2 V) to adjust quiescent drain current from 0 mA to 80 mA. The exposed metal ground paddle must be soldered to PCB ground for thermal and RF stability, with thermal resistance of 143.8°C/W.

Key Specifications

Pinout & Package

Package: 3 mm × 3 mm, 16-lead lead frame chip scale package (LFCSP, HCP-16-1) with exposed ground paddle requiring solder connection to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low noise amplifier applications.

Compared with HMC902LP3E, HMC903LP3E extends usable bandwidth downward while maintaining identical form factor and bias interface, whereas QPL9057 trades bandwidth for ultra-low noise and miniaturization-making each suitable for distinct segment-specific RF front-end architectures.

Availability

HMC902LP3E is available at Aetrix Electronics and suitable for point-to-point radios, VSAT terminals, and military communications systems requiring stable component supply, controlled thermal performance, and repeatable RF characteristics across production batches.

Supply support for HMC902LP3E 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 leader in high-performance analog, mixed-signal, and RF ICs, serving precision instrumentation, communications, and defense markets with vertically integrated design and manufacturing.

The HMC902LP3E belongs to Analog Devices' Hittite Microwave MMIC product line, engineered specifically for microwave and millimeter-wave infrastructure where low noise, high linearity, and thermal robustness are non-negotiable in C- and X-band systems.

FAQ

What is the recommended operating voltage and current for the HMC902LP3E?

The HMC902LP3E is specified for 3.5 V supply at 80 mA quiescent drain current (IDQ) under self-biased conditions. This delivers optimal gain (19.5 dB), noise figure (1.8 dB), and linearity (28 dBm IP3). Operation at 3.0 V to 4.0 V is supported, though P1dB decreases below 3.5 V as shown in Figure 18 of the datasheet. The HMC902LP3E must not exceed 4.5 V drain bias per absolute maximum ratings.

Does the HMC902LP3E require external DC blocking capacitors on RFIN or RFOUT?

No, the HMC902LP3E integrates on-chip DC blocking capacitors at both RFIN and RFOUT. This eliminates the need for external series coupling capacitors in standard 50 Ω system designs, reducing component count and PCB area. External DC blocking is only required if intentional DC injection or extraction is needed at those ports - which is not supported by the HMC902LP3E's internal structure.

How should the exposed paddle (EPAD) of the HMC902LP3E be connected on the PCB?

The exposed paddle of the HMC902LP3E must be soldered to a solid, low-inductance RF/dc ground plane using multiple thermal vias. Per datasheet Figure 22 and Pin Configuration section, failure to properly connect the EPAD results in degraded thermal performance (143.8°C/W rating unachievable), unstable gain, and potential device damage. The EPAD is electrically and thermally part of the GND network-not an isolated thermal slug.

Can the HMC902LP3E be used as a local oscillator driver?

Yes, the HMC902LP3E is explicitly qualified as an LO driver for balanced, I/Q, and image-reject mixers due to its 16 dBm P1dB output power and 28 dBm IP3. Its 50 Ω matched, DC-blocked output ensures clean signal delivery to mixer ports without additional matching, and its broadband 5–11 GHz response covers common LO frequencies in microwave transceivers. The HMC902LP3E datasheet confirms this use case in the General Description section.

What is the function of VGG1 and VGG2 pins on the HMC902LP3E?

VGG1 and VGG2 are optional gate bias control terminals that allow adjustment of quiescent drain current (IDQ) from 0 mA to 80 mA. When left open, the HMC902LP3E operates in self-biased mode at 80 mA. Applying −2 V to +0.2 V to these pins reduces IDQ - enabling power-down, TDD duty cycling, or thermal management. Bias sequencing during power-up/down is mandatory to prevent damage, as detailed in the Applications Information section of the HMC902LP3E datasheet.