Analog Devices Inc. EVAL01-HMC6981LS6

Overview

EVAL01-HMC6981LS6 from Analog Devices is an evaluation PCB designed to characterize the HMC6981LS6 GaAs pHEMT MMIC power amplifier operating from 15–20 GHz, delivering +34 dBm saturated output power, 26 dB gain, and 25% PAE at +5.5 V with 1100 mA supply current. It supports RF input/output via K-connectors and integrates on-board biasing, decoupling, and temperature-compensated power detection circuitry for lab validation of high-frequency SATCOM and point-to-point radio front-ends.

For engineers reviewing the EVAL01-HMC6981LS6 datasheet, EVAL01-HMC6981LS6 pinout, EVAL01-HMC6981LS6 application, or EVAL01-HMC6981LS6 equivalent, this board enables rapid functional verification, small-signal/gain flatness measurement, power compression analysis, and detector linearity calibration across the full 15–20 GHz band under controlled thermal and bias conditions.

Technical Context

The EVAL01-HMC6981LS6 implements a fully populated reference design for the HMC6981LS6 amplifier in its native 16-terminal ceramic LCC_HS package. It provides matched 50 Ω microstrip traces from K-connectors (J1–J4) to RFIN (Pin 6) and RFOUT (Pin 14), with dedicated DC bias paths for five Vdd pins (1,2,3,10,16), dual Vgg control (Pins 4,9), and integrated Vref/Vdet monitoring (Pins 11,12).

All bypass networks use three-stage decoupling per drain rail: 100 pF (0402), 10 nF (0603), and 4.7 µF (Case A), while the ground paddle is connected to the bottom-layer RF ground plane via ≥12 thermal vias. The PCB substrate is Rogers 4350B (ε_r = 3.48, tanδ = 0.0037) with controlled impedance routing and optimized thermal relief for channel temperature management up to +85 °C.

Key Specifications

Availability

EVAL01-HMC6981LS6 is available at Aetrix Electronics and suitable for millimeter-wave test bench setup, 5G backhaul transceiver development, SATCOM terminal prototyping, and E-band point-to-point radio qualification requiring stable component supply and traceable evaluation hardware.

Supply support for EVAL01-HMC6981LS6 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 aerospace markets with precision signal processing solutions.

The EVAL01-HMC6981LS6 belongs to Analog Devices' RF/Microwave Evaluation Platform family, engineered to accelerate time-to-test for GaAs and GaN power amplifiers in E-band systems where gain flatness, power accuracy, and thermal stability are critical.

FAQ

What is the primary purpose of the EVAL01-HMC6981LS6 evaluation board?

The EVAL01-HMC6981LS6 evaluation board is a fully assembled, application-validated PCB designed specifically to evaluate the HMC6981LS6 GaAs pHEMT MMIC power amplifier. It enables engineers to measure key RF performance metrics-including gain, P1dB, Psat, IP3, and detector linearity-across the full 15–20 GHz band using standard lab equipment without custom layout. The board includes all necessary biasing, decoupling, and matching networks verified by Analog Devices.

Does the EVAL01-HMC6981LS6 support on-board temperature-compensated power detection?

Yes, the EVAL01-HMC6981LS6 implements the full Vref/Vdet monitoring interface for the HMC6981LS6's integrated power detector. It includes two 42.6 kΩ resistors (R1, R2) that establish the required bias current for the on-chip diode, enabling accurate DC voltage output (Vdet) proportional to RF output power across temperature. This allows real-time closed-loop power control and thermal drift compensation during testing.

What RF connector types are used on the EVAL01-HMC6981LS6 board?

The EVAL01-HMC6981LS6 uses "K"-type coaxial connectors (SRI specification) for all RF ports: J1 for RF input (RFIN), J2 for RF output (RFOUT), and J3/J4 as optional auxiliary monitor points. These connectors support operation up to 40 GHz, ensuring minimal insertion loss and return loss degradation when characterizing the HMC6981LS6's 15–20 GHz performance.

Can the EVAL01-HMC6981LS6 be used for continuous-wave (CW) and modulated signal testing?

Yes, the EVAL01-HMC6981LS6 supports both CW and modulated signal evaluation. Its 50 Ω matched input/output paths, low-phase-noise bias lines, and robust decoupling network preserve signal integrity for wideband modulation schemes (e.g., QPSK, 16-QAM) up to 1 GHz bandwidth. The board's thermal design sustains +34 dBm Psat under CW conditions and maintains linearity for ACPR-sensitive applications like point-to-multipoint radios.

Is the EVAL01-HMC6981LS6 compatible with standard reflow soldering processes?

Yes, the EVAL01-HMC6981LS6 uses industry-standard surface-mount components and a Rogers 4350B substrate rated for lead-free reflow profiles. The HMC6981LS6 IC itself has an MSL rating supporting peak reflow temperatures up to 260 °C, and all capacitors/resistors are 0402 or 0603 packages qualified for automated assembly. Board-level reflow does not require special thermal profiling beyond IPC-J-STD-020 Class 3 guidelines.