Analog Devices Inc. ADL5240-EVALZ

Overview

ADL5240-EVALZ from Analog Devices is a fully populated evaluation board for the ADL5240 digitally controlled variable gain amplifier (VGA), supporting RF/IF signal chains from 100 MHz to 4000 MHz. It enables rapid characterization of the VGA's 31.5 dB gain control range, ±0.25 dB step accuracy, 19.7 dB gain at 2.14 GHz, and OIP3 of 41.0 dBm - all under single 5 V supply operation with 93 mA quiescent current.

For engineers reviewing the ADL5240-EVALZ datasheet, ADL5240-EVALZ pinout, ADL5240-EVALZ application, or ADL5240-EVALZ equivalent, this board provides validated layout, calibrated RF interfaces (AMPIN/AMPOUT/DSAIN/DSAOUT), serial/parallel digital control access, thermal management via exposed pad grounding, and full support for gain block–DSA loop configuration flexibility in wireless infrastructure and ATE designs.

Technical Context

The ADL5240-EVALZ implements the ADL5240 IC in a production-ready 5 mm × 5 mm, 32-lead LFCSP package with all critical RF paths impedance-matched to 50 Ω. It supports both AMP-first and DSA-first signal chain topologies via configurable jumper options and includes dedicated decoupling (C1–C8) and bias chokes (L1) per Analog Devices' recommended layout.

It exposes the full 6-bit digital interface (SEL, CLK/D0, DATA/D1, LE/D2, D3–D6) for SPI or parallel control, enabling precise 0.5 dB gain steps across the entire frequency band. The board operates across −40°C to +85°C and integrates thermal vias beneath the exposed pad for junction-to-board heat transfer (θJA = 36.8°C/W).

Key Specifications

Availability

ADL5240-EVALZ is available at Aetrix Electronics and suitable for wireless infrastructure development, automated test equipment (ATE) calibration, RF/IF gain control prototyping, and 5G base station front-end validation requiring stable component supply and repeatable measurement conditions.

Supply support for ADL5240-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 precision signal processing and radio frequency solutions.

The ADL5240-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform family, designed specifically to accelerate development of wideband gain-controlled systems in communications, defense, and instrumentation applications.

FAQ

What is the primary function of the ADL5240-EVALZ?

The ADL5240-EVALZ is a fully populated evaluation board for the ADL5240 digitally controlled VGA. It provides immediate hardware access to all RF ports (AMPIN, AMPOUT, DSAIN, DSAOUT), digital control lines (SEL, CLK/D0, DATA/D1, LE/D2, D3–D6), and optimized decoupling to validate gain accuracy, linearity (OIP3), noise figure, and settling time across 100 MHz–4000 MHz - without requiring custom PCB design. The ADL5240-EVALZ enables direct bench-level characterization of the ADL5240 IC.

Does the ADL5240-EVALZ support both serial and parallel digital control modes?

Yes, the ADL5240-EVALZ supports both serial (3-wire SPI) and parallel control modes for the ADL5240 IC. The SEL pin is accessible via header, allowing users to configure mode selection by tying it to VDD (parallel) or ground (serial). All required digital signals - D0/CLK, D1/DATA, D2/LE, and D3–D6 - are routed to 0.1-inch headers with appropriate pull-up/down resistors and signal integrity considerations per Analog Devices' layout guidelines. This dual-mode support is fully implemented on the ADL5240-EVALZ.

Can the ADL5240-EVALZ be used to evaluate both AMP-first and DSA-first signal chain configurations?

Yes, the ADL5240-EVALZ supports both AMP-first (AMPIN → AMPOUT → DSAOUT) and DSA-first (DSAIN → DSAOUT → AMPIN) topologies via on-board jumpers and RF path routing. The board's physical layout isolates the amplifier and DSA sections while providing direct access to intermediate nodes, enabling engineers to measure gain, return loss, and distortion performance for either configuration - as specified in the ADL5240 datasheet's AMP-DSA and DSA-AMP loop measurements. This flexibility is built into the ADL5240-EVALZ design.

What RF termination and biasing components are included on the ADL5240-EVALZ?

The ADL5240-EVALZ includes all recommended RF termination and biasing components per the ADL5240 datasheet: dc blocking capacitors (C1–C6), amplifier output choke (L1), and decoupling capacitors (C3–C5 for VCC, C8 for VDD). Input/output RF ports feature SMA connectors with 50 Ω impedance control, and the exposed pad is soldered to a solid ground plane with thermal vias. No additional external components are needed to operate the ADL5240-EVALZ with the ADL5240 IC.

Is the ADL5240-EVALZ compatible with standard lab equipment such as VNAs and signal generators?

Yes, the ADL5240-EVALZ is fully compatible with standard lab equipment. Its RF input/output ports use industry-standard SMA connectors (50 Ω), and all digital control lines are accessible via 0.1-inch headers compatible with logic analyzers and microcontroller development tools. The board operates from a single 5 V supply and requires no special firmware or drivers - making it immediately usable with vector network analyzers, spectrum analyzers, signal generators, and power meters for S-parameter, gain, OIP3, and noise figure measurements of the ADL5240 IC.