Analog Devices Inc. 119197-HMC652LP2E

Overview

HMC652LP2E from Analog Devices (formerly Hittite Microwave) is a wideband 2 dB fixed-value SMT attenuator designed for RF signal conditioning in 50 Ω systems. It delivers ±0.5 dB attenuation tolerance over DC–25 GHz, handles +25 dBm CW input power, and achieves 22 dB typical return loss - enabling precise level control in microwave radio and test instrumentation.

For engineers reviewing the HMC652LP2E datasheet, HMC652LP2E pinout, HMC652LP2E application, or HMC652LP2E equivalent, key selection criteria include its flat frequency response, low temperature coefficient (0.0004 dB/°C), MSL1 reflow compatibility, and requirement for full ground paddle soldering to maintain VSWR performance.

Technical Context

This passive 50 Ω matched attenuator uses a monolithic thin-film resistor network integrated into a 2×2 mm QFN package with exposed ground paddle. Its DC-coupled RF ports (Pins 2 and 5) require external DC blocking capacitors when interfacing with biased signal paths.

Designed for broadband operation without frequency-dependent tuning, the HMC652LP2E maintains consistent attenuation and return loss across –40°C to +85°C operating range, supported by Class 1A ESD rating and RoHS-compliant matte tin lead finish.

Key Specifications

Pinout & Package

6-lead 2×2 mm QFN package with exposed ground paddle; RoHS-compliant matte Sn finish; MSL1 rated (260°C peak reflow).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar fixed-attenuator applications.

Compared with QPA1002 and VAT-2W2+, the HMC652LP2E offers optimal balance of 25 GHz bandwidth, tight ±0.5 dB tolerance, and compact 2×2 mm form factor - making it preferred for space-constrained, wideband RF designs requiring metrology-grade repeatability.

Availability

HMC652LP2E is available at Aetrix Electronics and suitable for fiber optic transceivers, microwave radio front-ends, and RF test equipment requiring stable component supply with guaranteed long-term availability and lot-to-lot consistency.

Supply support for HMC652LP2E 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 integrates its high-frequency RF portfolio into precision signal processing solutions for communications, defense, and instrumentation markets.

The HMC652LP2E belongs to the Hittite wideband fixed attenuator family, engineered specifically for applications demanding flat, repeatable loss across DC–25 GHz without active bias or tuning components.

FAQ

What is the maximum continuous RF input power rating for the HMC652LP2E?

The HMC652LP2E is rated for +25 dBm (316 mW) continuous wave input power at +25°C ambient. Absolute maximum RF input power is +27 dBm, but sustained operation above +25 dBm may cause thermal drift in attenuation accuracy or long-term reliability degradation. Derating is recommended above +70°C ambient per the datasheet's power vs. temperature curve.

Does the HMC652LP2E require DC blocking capacitors in the RF path?

Yes, the HMC652LP2E features DC-coupled RF ports (Pins 2 and 5). If either the driving source or load presents a non-zero DC potential, external DC blocking capacitors must be placed in series with both RF1 and RF2 to prevent bias disruption or device damage. The evaluation board (119197) confirms this design requirement.

What is the correct PCB land pattern and grounding strategy for the HMC652LP2E?

The HMC652LP2E requires full-soldering of its exposed ground paddle and all four corner ground leads (Pins 1, 3, 4, 6) to a solid RF ground plane. Hittite Application Note AN-119194 specifies the recommended land pattern - including thermal via placement under the paddle - to achieve specified return loss and thermal dissipation. Incomplete grounding causes >10 dB return loss degradation.

Is the HMC652LP2E compatible with lead-free reflow processes?

Yes, the HMC652LP2E carries MSL1 moisture sensitivity rating and is qualified for lead-free reflow with a peak temperature of 260°C. Its 100% matte tin lead finish and low-stress molded plastic body meet IPC/JEDEC J-STD-020D requirements for high-volume SMT assembly without popcorn cracking or intermetallic formation.

How does the attenuation accuracy of the HMC652LP2E vary with temperature?

The HMC652LP2E exhibits a typical temperature coefficient of 0.0004 dB/°C, resulting in ≤0.02 dB total drift across its –40°C to +85°C operating range. Attenuation tolerance remains ±0.5 dB over temperature, verified per datasheet Table 1 - making it suitable for unheated outdoor RF equipment where ambient swings exceed 60°C.