Analog Devices Inc. ADL8121-EVALZ

Overview

ADL8121-EVALZ from Analog Devices is a 4-layer evaluation board designed to characterize the ADL8121 GaAs pHEMT MMIC low noise amplifier operating from 0.025 GHz to 12 GHz, featuring SMA RF connectors, 50 Ω grounded coplanar waveguide traces, and SMT test points for VDD, GND, and VBIAS.

For engineers reviewing the ADL8121-EVALZ datasheet, ADL8121-EVALZ pinout, ADL8121-EVALZ application, or ADL8121-EVALZ equivalent, this board supports RF performance validation including insertion loss, return loss, gain flatness, and bias sequencing verification across its full frequency range using standard lab equipment.

Technical Context

The ADL8121-EVALZ implements a calibrated RF path with de-populated through calibration trace between J1 and J2, enabling trace loss compensation up to 12 GHz; measured insertion loss ranges from −0.14 dB at 1 GHz to −1.07 dB at 12 GHz.

It uses Rogers 4350B and Isola 370HR laminates (10 mil core, 62 mil nominal thickness), supports −40°C to +85°C operation, and integrates decoupling per ADL8121 characterization conditions: VDD = 5 V, IDQ = 95 mA, RBIAS = 324 Ω.

Key Specifications

Availability

ADL8121-EVALZ is available at Aetrix Electronics and suitable for RF amplifier evaluation, mmWave front-end characterization, and LNA validation requiring stable component supply in lab, R&D, and pre-production environments.

Supply support for ADL8121-EVALZ 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 company specializing in high-performance analog, mixed-signal, and RF technologies for precision signal processing applications.

The ADL8121-EVALZ belongs to Analog Devices' RF evaluation platform family, engineered specifically to accelerate development and validation of GaAs pHEMT MMIC LNAs in broadband communications and instrumentation systems.

FAQ

What is the primary function of the ADL8121-EVALZ?

The ADL8121-EVALZ is an evaluation board purpose-built to test and validate the ADL8121 GaAs pHEMT MMIC low noise amplifier. It provides calibrated RF paths, bias access via SMT test points, and impedance-matched 50 Ω traces to enable accurate measurement of gain, noise figure, and linearity from 0.025 GHz to 12 GHz without custom PCB design.

Does the ADL8121-EVALZ include the ADL8121 device?

Yes, the ADL8121-EVALZ evaluation board is shipped populated with the ADL8121ACPZN low noise amplifier IC. The board also includes all necessary decoupling capacitors, bias resistors (including the default 324 Ω RBIAS), and RF matching components used during official characterization of the ADL8121.

What equipment is required to operate the ADL8121-EVALZ?

To operate the ADL8121-EVALZ, users must provide an RF signal generator, RF spectrum analyzer or vector network analyzer, and a 5 V, 300 mA DC power supply. The board's SMA connectors and SMT test points (VDD, GND, VBIAS) allow direct integration into standard RF test setups without adapters or modifications.

How is calibration supported on the ADL8121-EVALZ?

The ADL8121-EVALZ includes a de-populated through calibration path between J1 and J2 connectors. When populated with SMA connectors and appropriate capacitors, this path enables trace loss calibration up to 12 GHz, with documented insertion loss from −0.14 dB (1 GHz) to −1.07 dB (12 GHz) and input/output return loss exceeding 18 dB across the band.

What are the recommended bias conditions for the ADL8121 on this board?

The ADL8121-EVALZ is configured for the ADL8121's specified characterization conditions: VDD = 5 V, supply current IDQ = 95 mA, and bias resistance RBIAS = 324 Ω (implemented by R2). These settings ensure alignment with published gain, noise figure, and OIP3 data in the ADL8121 datasheet when used with the board's optimized layout and materials.