Analog Devices Inc. EV1HMC8108LC5

Overview

EV1HMC8108LC5 from Analog Devices is an evaluation board for the HMC8108LC5 GaAs MMIC X-band I/Q low noise converter, operating from 9 GHz to 10 GHz with 13 dB typical conversion gain, 2 dB typical noise figure, and 20 dBc typical image rejection. It supports lower-sideband downconversion to 60 MHz IF using an external 90° hybrid and is designed for RF front-end validation in radar and satellite receiver systems.

For engineers reviewing the EV1HMC8108LC5 datasheet, EV1HMC8108LC5 pinout, EV1HMC8108LC5 application, or EV1HMC8108LC5 equivalent, this evaluation PCB enables rapid characterization of the HMC8108LC5's RF-to-IF performance, bias sequencing, thermal behavior, and interface compatibility with SMA-connected signal sources and spectrum analyzers.

Technical Context

The EV1HMC8108LC5 implements a fully populated, impedance-controlled test platform for the HMC8108LC5 die, featuring 50 Ω RF/LO/IF signal paths, optimized grounding via multiple vias to internal ground planes, and discrete bias network components (0.6 pF, 1 nF, 10 nF, 100 nF capacitors and 5.6 nH inductors) matching the device's recommended interface schematics. The PCB uses Rogers 4350 or Arlon 25FR laminate for stable high-frequency performance.

It integrates SMA connectors (SRI and Johnson brands) for RFIN, LOIN, IF_I, and IF_Q ports, plus test points (TP1–TP3) and a 12-pin SMT header (J4) for auxiliary control and monitoring. The board strictly follows the HMC8108's specified power-up bias sequence and thermal management guidelines, including direct connection of the LCC's exposed pad to the ground plane.

Key Specifications

Availability

EV1HMC8108LC5 is available at Aetrix Electronics and suitable for X-band radar development, satellite communications receiver prototyping, and military-grade RF front-end validation requiring stable component supply and traceable evaluation hardware.

Supply support for EV1HMC8108LC5 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 precision instrumentation, communications, and defense markets since 1965.

The EV1HMC8108LC5 belongs to Analog Devices' microwave evaluation board product line, engineered specifically to accelerate design-in and performance verification of their GaAs MMIC converters like the HMC8108LC5 in demanding X-band applications.

FAQ

What is the primary function of the EV1HMC8108LC5 evaluation board?

The EV1HMC8108LC5 evaluation board is a fully assembled, ready-to-use test platform for the HMC8108LC5 GaAs MMIC I/Q downconverter. It enables engineers to validate RF-to-IF conversion performance-including conversion gain, noise figure, and image rejection-in real-world 9–10 GHz signal chains without custom PCB design. The board includes all required biasing, matching, and interconnect elements per the HMC8108 datasheet.

Does the EV1HMC8108LC5 include the HMC8108LC5 IC?

Yes, the EV1HMC8108LC5 evaluation board includes one mounted HMC8108LC5 IC (U1) as the device under test (DUT), per Table 5 of the HMC8108 datasheet. The board is delivered fully populated with all passive components, SMA connectors, and test points required for immediate operation.

Which RF frequencies and IF configurations does the EV1HMC8108LC5 support?

The EV1HMC8108LC5 supports the full 9 GHz to 10 GHz RF input range of the HMC8108LC5 and delivers dual I/Q IF outputs centered at 60 MHz (typical). It requires an external 90° hybrid coupler connected to IF_I and IF_Q to select upper or lower sideband-lower sideband is demonstrated in the datasheet's Figure 57 application circuit.

What PCB material and layout features ensure X-band performance on the EV1HMC8108LC5?

The EV1HMC8108LC5 uses Rogers 4350 or Arlon 25FR high-frequency laminate to maintain controlled 50 Ω impedance across RF/LO/IF traces. Its layout implements direct grounding of the HMC8108LC5's exposed pad, dense via stitching between top and bottom ground planes, and strict adherence to datasheet-recommended capacitor/inductor values and placement-critical for stable operation above 9 GHz.

How is bias sequencing implemented on the EV1HMC8108LC5 evaluation board?

The EV1HMC8108LC5 does not integrate active bias sequencing circuitry; instead, it provides clearly labeled test points (TP1–TP3) and connector pins (J4) for external voltage supplies. Users must manually follow the HMC8108's documented 7-step power-up sequence-applying gate voltages first (LNA_VG1, LNA_VG2, BUFF_VG, MIX_VG, VCTRL), then drain supplies (LNA_VD1, LNA_VD2, BUFF_VD)-to prevent damage to the depletion-mode pHEMT transistors.