Analog Devices Inc. ADL5521-EVALZ

Overview

ADL5521-EVALZ from Analog Devices is a fully populated evaluation board designed to characterize and prototype the ADL5521 GaAs pHEMT low noise amplifier (LNA) across 400 MHz–4000 MHz. It supports single-supply operation at 3 V or 5 V, delivers 20.8 dB gain and 0.8 dB noise figure at 900 MHz, and enables rapid RF front-end validation in cellular, LTE, and 5G infrastructure receivers.

For engineers reviewing the ADL5521-EVALZ datasheet, ADL5521-EVALZ pinout, ADL5521-EVALZ application, or ADL5521-EVALZ equivalent, this board provides factory-optimized 1950 MHz matching, configurable tuning for wideband LNA evaluation, and direct access to all critical RF and bias nodes - enabling fast noise figure, gain, OIP3, and S-parameter measurements without custom PCB design.

Technical Context

The ADL5521-EVALZ implements a complete 50 Ω matched reference design for the ADL5521 LNA IC, featuring input/output matching networks with Coilcraft 0403HQ/0402HP inductors and Murata GJM-series capacitors. It integrates active bias control via external R1 (1.3 kΩ default), supports adjustable supply current (30–60 mA), and includes on-board decoupling (100 nF C5) and overvoltage protection (R2 option).

Designed for lab and benchtop use, the board accepts dc bias via clip leads or a 2-pin W1 connector, exposes all eight pins of the ADL5521's 3 mm × 3 mm LFCSP package, and allows reconfiguration of L1/C1 (input) and L2/C3 (output) to optimize performance across its full 400 MHz–4 GHz bandwidth.

Key Specifications

Availability

ADL5521-EVALZ is available at Aetrix Electronics and suitable for RF receiver development, cellular base station prototyping, and 5G small cell design requiring stable component supply and repeatable measurement setups.

Supply support for ADL5521-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 RF ICs, headquartered in Norwood, MA, with deep expertise in signal chain solutions for communications, instrumentation, and defense.

The ADL5521-EVALZ belongs to Analog Devices' RF evaluation platform family, engineered specifically to accelerate characterization and integration of their high-linearity, ultra-low-noise amplifiers into next-generation wireless infrastructure.

FAQ

What is the primary function of the ADL5521-EVALZ?

The ADL5521-EVALZ is a fully assembled evaluation board for the ADL5521 low noise amplifier IC. It provides a ready-to-use, 50 Ω matched RF test platform - not a standalone IC - enabling immediate measurement of gain, noise figure, OIP3, and S-parameters across 400 MHz–4000 MHz without custom layout or tuning effort.

Does the ADL5521-EVALZ require external power regulation?

No. The ADL5521-EVALZ accepts raw 3 V or 5 V dc input via clip leads or the W1 2-pin connector. On-board decoupling (C5 = 100 nF) and optional overvoltage protection (R2 = 8.2 Ω) ensure stable biasing for the ADL5521 IC under lab and bench conditions.

Can the ADL5521-EVALZ be used outside its factory-tuned 1950 MHz frequency?

Yes. The ADL5521-EVALZ is explicitly designed for re-tuning across 400 MHz–4000 MHz. Table 7 in the ADL5521 datasheet specifies replacement values for L1, C1, L2, and C3 to optimize input match (S11), output match (S22), noise figure, and gain at target frequencies including 900 MHz, 2600 MHz, and 3500 MHz.

How does the ADL5521-EVALZ handle bias current adjustment?

The ADL5521-EVALZ uses external resistor R1 (default 1.3 kΩ) to set ADL5521 supply current between 30 mA and 60 mA. Increasing R1 reduces current - enabling low-power operation while maintaining usable gain and noise performance - as verified in the ADL5521 datasheet's DC characteristics and temperature curves.

Is the ADL5521-EVALZ compatible with automated test equipment (ATE)?

Yes. With SMA-connected RFIN and RFOUT, exposed VPOS/GND test points, and accessible VBIAS and NIC pins, the ADL5521-EVALZ integrates directly into vector network analyzer (VNA), spectrum analyzer, and noise figure analyzer setups. Its compact size and ground-plane construction minimize parasitic coupling during calibrated RF measurements.