Analog Devices Inc. HMC801LP3E

Overview

HMC801LP3E from Analog Devices (formerly Hittite Microwave) is a GaAs MMIC 1-bit digital positive-control RF attenuator operating from DC to 10 GHz, delivering 15 dB attenuation with ±0.4 dB typical step error, 2 dB typical insertion loss, +53 dBm IIP3, and TTL/CMOS-compatible single control line - used in microwave radio, VSAT, and cellular infrastructure front-ends.

For engineers reviewing the HMC801LP3E datasheet, HMC801LP3E pinout, HMC801LP3E application, or HMC801LP3E equivalent, key selection criteria include broadband DC–10 GHz operation, low insertion loss under 2 dB, high linearity (+53 dBm IIP3), single +5 V supply, and 3×3 mm leadless SMT package compatibility with RF PCB grounding best practices.

Technical Context

The HMC801LP3E implements a monolithic GaAs-based switched-attenuator topology with off-chip AC-ground capacitors enabling near-DC operation. Its bidirectional RF path supports both RF1 and RF2 ports with matched 50 Ω impedance and requires external blocking and AC-ground capacitors per pin 3/10 and 5/8.

Control logic uses a single TTL/CMOS-compatible input (V1) referenced to ground, with defined low/high voltage thresholds (0–0.8 V / 2–5 V) and sub-30 µA input current. Biasing relies solely on a +5 V ±10% supply (Vdd), drawing only 0.23 mA typical at 25 °C.

Key Specifications

Pinout & Package

16-lead 3×3 mm leadless surface-mount package (RoHS-compliant low-stress plastic, matte Sn finish, MSL1); exposed ground paddle must be soldered to PCB RF ground per Hittite land pattern guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital RF attenuator applications.

Compared with HMC346LP3E and QM11036, the HMC801LP3E uniquely balances ultra-wideband DC–10 GHz coverage, +5 V simplicity, and high linearity - making it optimal for broadband test instrumentation and microwave infrastructure where binary attenuation suffices.

Availability

HMC801LP3E is available at Aetrix Electronics and suitable for microwave radio, cellular infrastructure, and test equipment requiring stable component supply, long-lifecycle support, and RoHS-compliant SMT packaging.

Supply support for HMC801LP3E 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 maintains its high-frequency RF product portfolio, emphasizing performance, reliability, and application-specific integration for defense, communications, and instrumentation markets.

The HMC801LP3E belongs to Hittite's legacy GaAs MMIC digital attenuator family, designed specifically for broadband RF and IF signal conditioning in systems demanding low insertion loss, high linearity, and simple digital control.

FAQ

What is the operating frequency range of the HMC801LP3E?

The HMC801LP3E operates from DC to 10 GHz, supporting broadband applications including IF stages, microwave radio links, and cellular infrastructure up to X-band. Its design uses external AC-ground capacitors to extend functionality down to true DC, unlike many competing attenuators limited to 100 MHz minimum frequency.

Does the HMC801LP3E require external components to function?

Yes, the HMC801LP3E requires external DC-blocking capacitors on RF1 and RF2 pins, plus external AC-ground capacitors on ACG1 and ACG2 pins - values selected based on lowest operating frequency. The evaluation PCB (P/N 121213) specifies 100 pF and 330 pF 0402 capacitors for typical use.

What is the control interface voltage requirement for the HMC801LP3E?

The HMC801LP3E accepts TTL/CMOS-compatible control voltages: logic low (0–0.8 V) selects 0 dB insertion loss state, and logic high (2–5 V) selects 15 dB attenuation. Input current is <1 µA in low state and ~30 µA in high state, enabling direct drive from standard digital ICs without buffering.

Is the HMC801LP3E still in active production?

The HMC801LP3E is marked OBSOLETE in official documentation, but remains available through authorized distributors and Aetrix Electronics with full traceability and lifecycle support coordination. Engineering samples and legacy production lots are accessible for continuity-critical programs.

How is thermal management handled on the HMC801LP3E?

The HMC801LP3E features an exposed ground paddle thermally coupled to the PCB; proper soldering of all GND pins (2, 4, 9, 11) and the paddle to a solid RF ground plane is mandatory. Thermal resistance is 83 °C/W (channel-to-ground), and continuous power dissipation is derated above 85 °C at 12 mW/°C.