Analog Devices Inc. EV1HMC941ALP4

Overview

EV1HMC941ALP4 from Analog Devices is an evaluation PCB designed to characterize the HMC941ALP4E - a GaAs MMIC 5-bit digital attenuator operating from 0.1 to 33 GHz, offering 0.5 dB LSB steps up to 15.5 dB total attenuation, ±0.3 dB typical step error, and +45 dBm input IP3 at low frequencies. It supports RF test setups in microwave radio, radar, and fiber-optic systems.

For engineers reviewing the EV1HMC941ALP4 datasheet, EV1HMC941ALP4 pinout, EV1HMC941ALP4 application, or EV1HMC941ALP4 equivalent, this board provides calibrated 2.9 mm RF interfaces, DC bias access, and verified layout for accurate high-frequency S-parameter and compression measurements of the HMC941ALP4E IC under real-world conditions.

Technical Context

The EV1HMC941ALP4 is a dedicated evaluation platform for the HMC941ALP4E attenuator IC, featuring Rogers 4350B substrate for stable 50 Ω RF transmission lines across 0.1–33 GHz. It integrates two 2.9 mm RF connectors (J1/J2) for thru-calibrated insertion loss measurement and separate DC control headers (J3, J4, J5) for independent Vdd (+5 V), Vss (−5 V), and P0–P4 logic inputs.

All critical RF paths are impedance-controlled, with package ground leads directly connected to a solid ground plane via multiple vias. The board includes 1000 pF 0402 DC-blocking capacitors (C1/C2) on RF ports and follows Analog Devices' recommended grounding and decoupling practices for GaAs MMIC characterization.

Key Specifications

Availability

EV1HMC941ALP4 is available at Aetrix Electronics and suitable for microwave radio development, radar front-end validation, and broadband test equipment design requiring stable component supply and repeatable high-frequency characterization platforms.

Supply support for EV1HMC941ALP4 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 semiconductor leader specializing in high-performance analog, mixed-signal, and RF technologies for precision signal processing applications.

The EV1HMC941ALP4 belongs to Analog Devices' RF evaluation board portfolio, engineered specifically to enable rapid, accurate characterization of their GaAs MMIC attenuators in demanding microwave and millimeter-wave systems.

FAQ

What is the primary function of the EV1HMC941ALP4 evaluation board?

The EV1HMC941ALP4 evaluation board is a purpose-built platform for characterizing the HMC941ALP4E 5-bit GaAs MMIC digital attenuator. It provides calibrated 2.9 mm RF interfaces, precise DC biasing (Vdd = +5 V, Vss = −5 V), and individual control access to all five attenuation bits (P0–P4), enabling full S-parameter, compression, and linearity testing of the EV1HMC941ALP4 target device across 0.1–33 GHz.

Does the EV1HMC941ALP4 support thru-calibration for vector network analyzer measurements?

Yes, the EV1HMC941ALP4 supports thru-calibration using its two 2.9 mm RF connectors (J1 and J2), which are positioned for direct RF path measurement with minimal discontinuity. The board's Rogers 4350B substrate and 50 Ω controlled-impedance traces ensure measurement integrity across the full 0.1–33 GHz range, as confirmed in Analog Devices' reference design documentation for the EV1HMC941ALP4.

What DC power supplies are required to operate the EV1HMC941ALP4 with the HMC941ALP4E?

The EV1HMC941ALP4 requires three independent DC supplies: +5 V for Vdd (pin 18), −5 V for Vss (pin 1), and 0/5 V logic levels for the five control inputs P0–P4 (pins 20–24). These are accessible via dedicated headers J3 (Vdd/Vss) and J4/J5 (control bits), matching the absolute maximum ratings and bias conditions specified for the HMC941ALP4E IC used on the EV1HMC941ALP4 board.

Is the EV1HMC941ALP4 compatible with other HMC941-series attenuators?

No - the EV1HMC941ALP4 is specifically designed for the HMC941ALP4E in the 16 mm² leadless plastic LP4 package. Its pad layout, grounding scheme, and RF interface placement are optimized for that exact variant. Other HMC941 variants (e.g., HMC941ALP3E or bare-die versions) have different footprints or thermal/bias requirements and are not mechanically or electrically compatible with the EV1HMC941ALP4 board.

What is the recommended RF launch method when integrating the EV1HMC941ALP4 into a custom test fixture?

For optimal RF performance, mount the EV1HMC941ALP4 board using the provided 2.9 mm connectors (J1/J2) directly to calibrated test cables or waveguide-to-coax adapters. Avoid soldering or wire bonding to RF pads - the board's design assumes connectorized use. Ensure the ground plane remains uninterrupted and that no floating metal objects are placed near the RF path, as specified in the EV1HMC941ALP4 layout notes for maintaining <0.1 dB measurement uncertainty below 33 GHz.