Analog Devices Inc. 117160-HMC593LP3

Overview

HMC593LP3 from Analog Devices (formerly Hittite Microwave) is a GaAs PHEMT MMIC low-noise amplifier with integrated bypass mode, operating in the 3.3–3.8 GHz band for WiMAX/WiBro receiver front-ends. It delivers 1.2 dB noise figure, 19 dB gain, and +29 dBm output IP3 at +5 V/40 mA, with 50 Ω input/output matching and no external components required.

For engineers reviewing the HMC593LP3 datasheet, HMC593LP3 pinout, HMC593LP3 application, or HMC593LP3 equivalent, key selection considerations include its dual-mode LNA/bypass operation, sub-2 dB bypass insertion loss, 428 ns LNA-to-bypass switching speed, and compatibility with fixed wireless infrastructure requiring high linearity and low power consumption in temperature-varying environments.

Technical Context

The HMC593LP3 integrates a monolithic GaAs PHEMT process enabling simultaneous high gain and ultra-low noise across 3.3–3.8 GHz. Its internal bypass path uses a single Vctl control line (0 V / Vdd) to switch between active amplification and low-loss signal pass-through, reducing supply current from 40 mA to 10 µA without external relays or switches.

It features fully matched 50 Ω RF ports (RFIN and RFOUT), eliminating discrete matching networks. The device operates over –40°C to +85°C, with gain variation ≤0.011 dB/°C and noise figure stability ≤0.4 dB across temperature and supply voltage (3 V to 5.5 V).

Key Specifications

Pinout & Package

Package: 16-lead LP3 (Low-Profile Plastic) surface-mount package with exposed ground paddle; RoHS-compliant version available as HMC593LP3E. Dimensions: 4.0 × 4.0 × 0.85 mm (157 × 157 × 33 mil). Requires soldering of all ground leads and paddle to PCB RF ground per Hittite land pattern guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HMC593LP3, HMC460LC4 offers broader frequency coverage but sacrifices integrated bypass and adds design complexity, while QPL9057 matches band and function closely but constrains supply flexibility and thermal margin - making HMC593LP3 optimal for infrastructure-grade 3.5 GHz receivers needing robust dual-voltage operation and proven field reliability.

Availability

HMC593LP3 is available at Aetrix Electronics and suitable for wireless infrastructure, fixed wireless access, and tower-mounted amplifier applications requiring stable component supply, long-lifecycle support, and traceable sourcing for industrial deployment.

Supply support for HMC593LP3 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 continues to support its high-frequency RF portfolio, including GaAs MMIC amplifiers, mixers, and switches for communications and defense markets.

The HMC593LP3 belongs to Hittite's legacy LP3-series GaAs PHEMT MMIC family, designed specifically for high-performance, temperature-stable, low-noise amplification in licensed 3.5 GHz fixed wireless and 4G infrastructure systems.

FAQ

What is the recommended DC blocking capacitor value for RFIN and RFOUT on the HMC593LP3?

The HMC593LP3 datasheet specifies 100 pF for both RFIN and RFOUT AC coupling capacitors in the standard application circuit. These values ensure optimal impedance matching and broadband performance across 3.3–3.8 GHz while maintaining adequate low-frequency rejection. Using 100 pF in 0402 package minimizes parasitic inductance and preserves the device's specified 23 dB input return loss and 13 dB output return loss. Deviations may degrade noise figure or gain flatness.

Does the HMC593LP3 require external matching components for 50 Ω operation?

No, the HMC593LP3 does not require external matching components for 50 Ω operation. Its RFIN and RFOUT ports are internally matched to 50 Ω across the full 3.3–3.8 GHz band, delivering 23 dB and 13 dB return loss respectively without additional LC networks or stubs. This simplifies layout, reduces bill-of-materials cost, and improves repeatability in high-volume manufacturing - a key advantage confirmed in the device's functional diagram and electrical specifications table.

What is the absolute maximum drain bias voltage (Vdd) rating for the HMC593LP3?

The absolute maximum drain bias voltage (Vdd) for the HMC593LP3 is +8 V, as stated in the Absolute Maximum Ratings table. However, the device is characterized and optimized for operation at +3 V or +5 V, with performance metrics (gain, NF, IP3) guaranteed only within the 3.0–5.5 V range. Exceeding +5.5 V risks permanent degradation, especially under RF drive, and voids reliability guarantees - the +8 V rating is strictly for short-duration transient tolerance, not steady-state use.

How does the HMC593LP3 handle thermal management in continuous operation?

The HMC593LP3 features an exposed ground paddle and a thermal resistance of 76.9 °C/W (channel-to-paddle), enabling effective heat dissipation when soldered to a thermally robust PCB ground plane. At +5 V/40 mA (200 mW DC power), junction temperature rise is ~15°C above board temperature - well within the –40°C to +85°C operating range. Continuous power dissipation is rated at 850 mW at 85°C ambient, derating linearly above that temperature. Proper via placement under the paddle is essential to realize this spec.

Is the HMC593LP3 still in active production or marked obsolete?

The HMC593LP3 is marked "OBSOLETE" in the provided documentation, indicating end-of-life status by Analog Devices. However, Aetrix Electronics maintains legacy inventory and offers lifecycle availability coordination, including last-time buy planning and cross-reference support. Customers designing new systems should evaluate qualified alternatives like QPL9057 or consult Analog Devices' official obsolescence notice for formal PDN timelines and replacement guidance specific to HMC593LP3.