Analog Devices Inc. 107220-HMC373LP3

Overview

HMC373LP3 from Analog Devices is a GaAs PHEMT MMIC low-noise amplifier with integrated bypass mode, designed for RF front-end receivers in 700–1000 MHz cellular basestations. It delivers 14 dB gain, 0.9 dB noise figure, and +35 dBm output IP3 at +5 V / 90 mA, enabling high-dynamic-range signal amplification in GSM, CDMA, and W-CDMA base station receiver chains.

For engineers reviewing the HMC373LP3 datasheet, HMC373LP3 pinout, HMC373LP3 application, or HMC373LP3 equivalent, key selection criteria include its dual-mode operation (LNA/bypass), 50 Ω input/output matching, temperature-stable gain/noise performance, and compatibility with compact LFCSP packaging for space-constrained RF modules.

Technical Context

The HMC373LP3 integrates a monolithic GaAs PHEMT process with on-die biasing and matching networks to achieve broadband 700–1000 MHz operation without external tuning. Its LNA mode uses internal 19 nH RF choke and DC blocking at RFOUT, while bypass mode achieves ≤2.0 dB insertion loss via open-circuit control of Vctl (Pin 4).

Thermal design is enabled by a thermally enhanced 3 mm × 3 mm LFCSP package with exposed paddle (θ_JA = 74.1 °C/W), supporting continuous operation from –40 °C to +85 °C. Gain variation over temperature is tightly controlled at ±0.015 dB/°C in LNA mode, ensuring stable cascaded link budgets across environmental extremes.

Key Specifications

Pinout & Package

Package: 16-lead Lead Frame Chip Scale Package (LFCSP), 3 mm × 3 mm body, 0.85 mm height, JEDEC MO-220-VEED-4 compliant, with exposed thermal paddle.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC668LP3E and QPL9057, the HMC373LP3 uniquely balances narrowband cellular optimization (700–1000 MHz), integrated bypass functionality, and +5 V compatibility - making it optimal for legacy and hybrid basestation upgrades where power architecture and board space are constrained.

Availability

HMC373LP3 is available at Aetrix Electronics and suitable for GSM/CDMA basestation receivers, private land mobile radio infrastructure, and multi-standard SDR transceivers requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for HMC373LP3 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 aerospace markets with precision signal processing solutions.

The HMC373LP3 belongs to Analog Devices' Hittite Microwave MMIC product line, engineered specifically for high-linearity, low-noise RF front-end applications in wireless infrastructure equipment.

FAQ

What is the recommended DC bias configuration for HMC373LP3?

The HMC373LP3 requires a +5 V DC supply applied to Pin 9 (Vdd) with an external choke inductor and bypass capacitor per the application circuit. Pin 4 (Vctl) must be shorted to ground for LNA mode or left open for bypass mode. Pin 6 (ACG) needs a 0.01 µF capacitor to ground. All GND pins (7, 14) and NC pins should connect to a low-inductance RF ground plane. This configuration ensures specified gain, noise figure, and linearity across temperature.

Does HMC373LP3 support operation outside the 700–1000 MHz band?

HMC373LP3 is characterized and optimized for 700–1000 MHz operation, with guaranteed specifications across that range. While usable beyond those limits - e.g., gain remains >10 dB from 600–1100 MHz - noise figure degrades above 1000 MHz and input return loss falls below 20 dB below 700 MHz. For reliable performance, HMC373LP3 should be deployed strictly within its specified 700–1000 MHz band unless validated by system-level testing.

How does the bypass mode of HMC373LP3 affect system-level isolation?

In bypass mode, HMC373LP3 achieves ≤2.0 dB insertion loss and maintains >20 dB reverse isolation (S12) across 700–1000 MHz. This prevents transmit leakage from coupling back into the receive path during TDD operation. The open-circuit Vctl control eliminates control-line radiation, and the 50 Ω matched I/O ensures minimal VSWR disruption to adjacent filters or duplexers - critical for maintaining TRX isolation in compact basestation modules.

What thermal management is required for continuous operation of HMC373LP3?

HMC373LP3 dissipates up to 450 mW in LNA mode (+5 V × 90 mA). Its 3 mm × 3 mm LFCSP package relies on the exposed paddle soldered to a thermal pad with ≥6 vias to inner ground planes. With θ_JA = 74.1 °C/W, junction temperature stays below 150 °C if board-level thermal resistance keeps case temperature ≤85 °C. No heatsink is required, but copper pour and via density must meet Analog Devices' layout guidelines for HCP-16-1 packages.

Is HMC373LP3 pin-compatible with other Hittite LP3-series amplifiers?

HMC373LP3 uses the standard 16-lead LFCSP (HCP-16-1) footprint shared across many Hittite LP3 devices, including HMC668LP3E and HMC487LP3E. However, pin functions differ: Vctl (Pin 4) is unique to HMC373LP3's bypass capability, and RFOUT (Pin 11) is AC-coupled here but DC-coupled in others. Direct replacement is not possible without layout revision - verify pin mapping and biasing per each device's datasheet before substitution.