Analog Devices Inc. ADL8142-EVALZ

Overview

ADL8142-EVALZ from Analog Devices is a 4-layer RF evaluation board designed to characterize the ADL8142 GaAs pHEMT MMIC low noise amplifier operating from 23 GHz to 31 GHz. It features 2.92 mm female RF connectors, 50 Ω grounded coplanar waveguide traces, and SMT test points for VDD, GND, and VBIAS, enabling precise biasing and RF performance validation in millimeter-wave LNA applications.

For engineers reviewing the ADL8142-EVALZ datasheet, ADL8142-EVALZ pinout, ADL8142-EVALZ application, or ADL8142-EVALZ equivalent, this board supports full RF characterization-including insertion loss, return loss, and gain flatness-using network analyzers, spectrum analyzers, and calibrated 2 V/100 mA bias supplies under −40°C to +85°C operating conditions.

Technical Context

The ADL8142-EVALZ implements a high-frequency evaluation platform optimized for the ADL8142's 23 GHz–31 GHz bandwidth, using Rogers 4003C and Isola 370HR laminates to maintain stable dielectric properties and minimal dispersion. Its 50 Ω coplanar waveguide routing, direct ground paddle vias, and controlled impedance paths ensure accurate small-signal S-parameter measurement without parasitic degradation.

It includes a depopulated through-calibration path between J1 and J2 (performance documented from 23–31 GHz), supporting trace loss de-embedding. Bias sequencing mandates VDD application before RF input and removal of RF before powering down, with recommended operation at VDD = 2 V and IDQ = 25 mA via a 634 Ω RBIAS resistor.

Key Specifications

Availability

ADL8142-EVALZ is available at Aetrix Electronics and suitable for millimeter-wave receiver front-end development, 5G base station prototyping, satellite communications link validation, and radar transceiver characterization requiring stable component supply and repeatable RF evaluation infrastructure.

Supply support for ADL8142-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Wilmington, MA, with deep expertise in RF, microwave, and mmWave solutions.

The ADL8142-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform product line, engineered specifically to accelerate design-in and performance validation of their GaAs pHEMT MMIC amplifiers in demanding millimeter-wave systems.

FAQ

What is the primary purpose of the ADL8142-EVALZ?

The ADL8142-EVALZ is an evaluation board designed exclusively to characterize the ADL8142 GaAs pHEMT MMIC low noise amplifier across its full 23 GHz to 31 GHz frequency range. It provides calibrated RF interfaces, precise bias control via SMT test points, and verified 50 Ω signal integrity to enable accurate S-parameter, gain, and noise figure measurements in lab and development environments.

Which RF connectors are used on the ADL8142-EVALZ?

The ADL8142-EVALZ uses 2.92 mm female coaxial connectors for both RFIN and RFOUT ports. These connectors support reliable, low-reflection measurements up to 40 GHz and are industry-standard for millimeter-wave evaluation. J1 and J2 positions are designated for optional through-calibration path use but ship depopulated per default configuration.

What power supply requirements does the ADL8142-EVALZ need?

The ADL8142-EVALZ requires a 2 V, 100 mA DC power supply connected to the VDD and GND SMT test points. This matches the ADL8142's recommended bias condition for optimal noise figure and gain performance (IDQ = 25 mA). A 634 Ω RBIAS resistor is populated to set quiescent current, and strict bias sequencing-VDD first, RF last-is mandatory to prevent device stress.

Does the ADL8142-EVALZ include a calibration path?

Yes-the ADL8142-EVALZ includes a depopulated through-calibration path between J1 and J2 connectors. When fitted with matching 2.92 mm connectors, this path enables trace loss de-embedding. Insertion loss and return loss data across 23–31 GHz are provided in Table 1 of UG-2039, confirming usable calibration accuracy within ±0.2 dB insertion loss variation over the band.

Can the ADL8142-EVALZ be used outside the −40°C to +85°C range?

No-the ADL8142-EVALZ is assembled with components rated for −40°C to +85°C, including capacitors (X7R/C0G), resistors, and PCB materials selected to maintain electrical and mechanical integrity across that range. Operation outside this range may cause impedance shift, solder joint reliability issues, or measurement drift, and is not validated or supported for the ADL8142-EVALZ.