Analog Devices Inc. 108347-HMC465LP5

Overview

HMC465LP5 from Analog Devices is a GaAs PHEMT MMIC modulator driver amplifier operating from DC to 20 GHz, delivering 15 dB gain, +25 dBm saturated output power, and 3 dB noise figure at +8 V/160 mA. It features 50 Ω matched I/O, ±0.5 dB gain flatness (DC–10 GHz), and ±4° phase linearity deviation-optimized for OC192 LiNbO₃/Mach-Zehnder optical modulator driving in high-speed fiber infrastructure.

For engineers reviewing the HMC465LP5 datasheet, HMC465LP5 pinout, HMC465LP5 application, or HMC465LP5 equivalent, key selection criteria include its 10 V_pk-pk output swing capability, temperature-stable gain variation (≤0.045 dB/°C), broadband DC–20 GHz operation, and QFN-32 5×5 mm package with exposed thermal paddle for RF/microwave system integration.

Technical Context

The HMC465LP5 employs a distributed GaAs PHEMT architecture enabling wideband DC–20 GHz amplification without external matching networks. Its dual-gate biasing (Vgg1, Vgg2) allows precise control of drain current (Idd = 160 mA typical) and output voltage swing (up to 10 V_pk-pk) while maintaining 50 Ω input/output impedance.

Internally matched 50 Ω ports eliminate need for external DC blocking or impedance tuning. Gain flatness (±0.5 dB) and group delay variation (±15 psec) across DC–10 GHz support high-fidelity pulse and eye-diagram integrity in optical modulation applications, with Psat = +25 dBm and IP3 = +28 dBm at 10 GHz.

Key Specifications

Pinout & Package

Package: 32-lead lead frame chip scale package (LFCSP), 5 mm × 5 mm × 0.85 mm, with exposed thermal paddle (JEDEC MO-220-VHHD-4 compliant). RoHS-compliant Sn finish, MSL1 rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar modulator driver amplifier applications.

Compared with HMC465LP5E and HMC608LC5, the HMC465LP5 offers optimal balance of DC–20 GHz bandwidth, 10 V_pk-pk drive, and 160 mA power efficiency for cost-sensitive OC192 and VSAT designs, while HMC465LP5E provides identical performance in RoHS environments and HMC608LC5 extends capability to 26 GHz at higher power consumption.

Availability

HMC465LP5 is available at Aetrix Electronics and suitable for OC192 optical transmitters, microwave test equipment, and military EW systems requiring stable component supply, consistent RF performance across temperature, and long-term obsolescence management.

Supply support for HMC465LP5 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 precision instrumentation, communications, and defense markets since 1965.

The HMC465LP5 belongs to Analog Devices' Hittite Microwave MMIC product line, engineered specifically for high-speed optical and microwave infrastructure where wideband gain, high output voltage, and thermal robustness are essential.

FAQ

What is the maximum RF input power rating for the HMC465LP5?

The HMC465LP5 has an absolute maximum RF input power rating of +23 dBm at Vdd = +8 Vdc. Exceeding this level risks permanent damage to the GaAs PHEMT devices. For reliable operation, input signals should remain ≤+15 dBm to maintain linearity and avoid compression-induced distortion in the HMC465LP5 amplifier stage.

Does the HMC465LP5 require external DC blocking capacitors on its RF ports?

No, the HMC465LP5 does not require external DC blocking capacitors. Its RFIN and RFOUT ports are internally DC-coupled and matched to 50 Ω, enabling direct connection to other DC-coupled stages. The HMC465LP5 datasheet confirms that RFIN is DC-coupled and designed for seamless integration in baseband-to-RF signal chains without added capacitive discontinuities.

How is thermal management implemented for the HMC465LP5 in high-power operation?

The HMC465LP5 uses a thermally enhanced 5×5 mm LFCSP package with an exposed ground paddle. Effective thermal management requires soldering this paddle to a solid PCB ground plane using ≥6 thermal vias to an internal ground layer. With θ_JA = 41.5 °C/W, the HMC465LP5 maintains safe junction temperatures below 150 °C at full +25 dBm Psat when properly mounted per JEDEC MO-220 guidelines.

Can the HMC465LP5 drive a differential LiNbO₃ modulator directly?

Yes-the HMC465LP5 delivers up to 10 V_pk-pk single-ended output, which can be converted to ±5 V differential swing using a balun or transformer. Its 15 dB gain and low group delay variation (±15 psec) ensure balanced amplitude and phase response across DC–10 GHz, making the HMC465LP5 well-suited for driving commercial LN modulators used in OC192 and 100G Ethernet transceivers.

What is the recommended gate bias sequence for powering up the HMC465LP5?

Per the HMC465LP5 datasheet, the correct power-up sequence is: (1) ground all pins, (2) set Vgg1 to –2 V (zero Idd), (3) set Vgg2 to +1 V, (4) apply Vdd = +5 V, then (5) adjust Vgg1 to achieve Idd = 160 mA. This prevents transient overcurrent and ensures stable startup of the GaAs PHEMT amplifier core within the HMC465LP5 device.