Analog Devices Inc. EV1HMC985ALP4K

Overview

EV1HMC985ALP4K from Analog Devices is an evaluation PCB designed for the HMC985ALP4KE GaAs MMIC voltage-variable attenuator (VVA), supporting 10–40 GHz RF signal conditioning with dual analog control (Vctl1/Vctl2), 35 dB attenuation range, and +32 dBm input IP3. It enables precise characterization of RF linearity, temperature stability, and frequency-dependent attenuation in microwave test setups.

For engineers reviewing the EV1HMC985ALP4K datasheet, EV1HMC985ALP4K pinout, EV1HMC985ALP4K application, or EV1HMC985ALP4K equivalent, this board provides validated RF layout, K-connector interfaces, DC biasing network, and ground-integrated thermal management - critical for evaluating high-frequency VVA performance before system integration.

Technical Context

The EV1HMC985ALP4K is a dedicated evaluation platform for the HMC985ALP4KE, featuring 50 Ω microstrip routing, grounded coplanar waveguide transitions, and direct-mount placement of the 24-lead 4×4 mm QFN package. It implements separate DC bias paths for Vctl1 and Vctl2 with decoupling capacitors (100 pF, 0.01 µF, 4.7 µF) to suppress low- and high-frequency noise.

Board-level design follows RF best practices: top-layer signal traces reference solid bottom ground plane via ≥12 thermal vias under the exposed paddle, K-connectors (J1–J2, J6–J7) support 40 GHz operation, and DC pins (J3–J5) provide isolated control voltage access without RF coupling. No on-board active components beyond passive filtering and connectors.

Key Specifications

Availability

EV1HMC985ALP4K is available at Aetrix Electronics and suitable for microwave test instrumentation, radar front-end validation, and VSAT radio development requiring stable component supply and repeatable RF measurement conditions.

Supply support for EV1HMC985ALP4K 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 communications, industrial, automotive, and defense markets with precision signal processing solutions.

The EV1HMC985ALP4K belongs to Analog Devices' RF evaluation platform product line, engineered specifically to accelerate characterization and integration of high-frequency MMICs like the HMC985ALP4KE in demanding microwave applications.

FAQ

What is the primary function of the EV1HMC985ALP4K?

The EV1HMC985ALP4K is an evaluation PCB designed exclusively for the HMC985ALP4KE voltage-variable attenuator. It provides a calibrated RF environment - including matched 50 Ω paths, K-connectors, and dual isolated DC bias networks - to measure insertion loss, attenuation range, return loss, and IP3 across 10–40 GHz before integrating the HMC985ALP4KE into end systems.

Does the EV1HMC985ALP4K include the HMC985ALP4KE device?

Yes, the EV1HMC985ALP4K evaluation PCB includes one mounted HMC985ALP4KE IC (24-lead 4×4 mm QFN). The board ships fully assembled with all passive components, connectors, and the HMC985ALP4KE installed and soldered per Analog Devices' recommended land pattern and reflow profile.

Can the EV1HMC985ALP4K be used for production deployment?

No - the EV1HMC985ALP4K is strictly an evaluation and characterization tool. Its layout prioritizes measurement accuracy over size, cost, or environmental ruggedness. For production, designers must implement the HMC985ALP4KE in their own PCB using the official land pattern, grounding guidelines, and RF layout rules documented in the HMC985ALP4KE datasheet.

What RF connector types are used on the EV1HMC985ALP4K?

The EV1HMC985ALP4K uses K-type coaxial connectors (J1, J2, J6, J7) rated for operation up to 40 GHz. These support precise S-parameter measurements of the HMC985ALP4KE's RFIN and RFOUT ports. J3–J5 are standard 0.1"-spaced DC pins for applying Vctl1 and Vctl2 control voltages.

How is thermal management handled on the EV1HMC985ALP4K?

Thermal management relies on the HMC985ALP4KE's exposed ground paddle, which is soldered directly to the PCB's internal ground plane. The EV1HMC985ALP4K includes ≥12 thermal vias beneath the IC to conduct heat to the bottom layer, and the board's 4-layer stack-up ensures low thermal resistance - critical for maintaining junction temperature below 175 °C during high-power RF testing.