Analog Devices Inc. ADL5904-EVALZ

Overview

ADL5904-EVALZ from Analog Devices is an evaluation board designed to characterize the ADL5904 dual-function RF TruPwr™ detector, supporting dc to 6 GHz operation with 45 dB dynamic range (−30 dBm to +15 dBm), RMS power measurement, and envelope threshold detection with 12 ns response time. It enables rapid validation of transmitter signal strength indication (TSSI) and RF input protection in wireless infrastructure.

For engineers reviewing the ADL5904-EVALZ datasheet, ADL5904-EVALZ schematic, ADL5904-EVALZ layout, or ADL5904-EVALZ alternative evaluation platforms, this board provides calibrated RF input paths, configurable CRMS/DECL filtering, VCAL-based threshold calibration, and direct access to Q/Q latch outputs for envelope event capture in real-time RF monitoring applications.

Technical Context

The ADL5904-EVALZ implements a complete test environment for the ADL5904 IC, including 50 Ω broadband RF input matching via external 82.5 Ω shunt resistor and 0.47 µF ac-coupling capacitor, selectable CRMS averaging capacitors (10 nF default), and dedicated VRMS, VCAL, Q/Q, RST, and VIN− test points. All critical analog and digital interfaces are routed to SMA connectors or 0.1" headers.

It supports full functional validation across temperature (−40°C to +105°C) and frequency (dc–6 GHz), with on-board decoupling (4.02 Ω + 100 nF on DECL), ENBL-controlled power-down (100 µA), and exposed-pad thermal management aligned with CP-16-22 package requirements. Calibration traces and jumper options allow verification of both RMS log-conformance error (<±0.5 dB) and threshold latch timing (12 ns).

Key Specifications

Availability

ADL5904-EVALZ is available at Aetrix Electronics and suitable for wireless infrastructure development, RF front-end prototyping, and production test system integration requiring stable component supply, traceable evaluation hardware, and documented performance validation.

Supply support for ADL5904-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 Norwood, MA.

The ADL5904-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform product line, engineered to accelerate design-in of precision RF power detectors in cellular base stations, microwave links, and radar subsystems.

FAQ

What is the primary function of the ADL5904-EVALZ?

The ADL5904-EVALZ is an evaluation board specifically designed to demonstrate and validate the ADL5904 dual-function RF detector IC. It enables engineers to measure RMS power (−30 dBm to +15 dBm, dc–6 GHz) and perform envelope threshold detection with 12 ns response time. The board provides all necessary biasing, filtering, and signal routing to fully exercise the ADL5904's VRMS, VCAL, Q/Q, RST, and VIN− interfaces without custom PCB design. ADL5904-EVALZ supports immediate lab characterization and system-level integration testing.

Does ADL5904-EVALZ support calibration of the ADL5904's threshold detection function?

Yes, ADL5904-EVALZ directly supports threshold calibration via the VCAL pin test point. Users apply known RF input levels (e.g., 0 dBm, 10 dBm), measure VCAL voltage with no signal and with signal applied, then compute the required VIN− threshold voltage as the difference - enabling accurate, application-specific envelope trip points. This process is documented in the ADL5904 datasheet (Rev. B, p.22) and implemented with low-noise routing on ADL5904-EVALZ to preserve measurement integrity.

Can ADL5904-EVALZ be used for modulated signal analysis (e.g., LTE, QAM)?

Yes, ADL5904-EVALZ supports modulated signal evaluation including LTE TM1 (20 MHz), W-CDMA, QPSK, 16 QAM, and 64 QAM waveforms. Its broadband input path and configurable CRMS capacitor (default 10 nF, upgradable to 1 µF) allow optimization for peak-to-average ratio (PAR) and residual ripple trade-offs. Performance data in the ADL5904 datasheet (Figures 4–8) was captured using ADL5904-EVALZ or equivalent hardware, confirming <±0.5 dB RMS error across modulation types at 900 MHz and 2.14 GHz.

What power supply requirements does ADL5904-EVALZ have?

ADL5904-EVALZ requires a single 3.3 V ±10% supply delivering up to 3.5 mA during active operation and reducing to 100 µA in power-down mode when ENBL is low. On-board decoupling uses a 4.02 Ω resistor in series with 100 nF capacitor on the DECL pin, and standard 0.1 µF/10 µF bulk caps on VPOS. The board accepts power via screw terminal or header, with reverse-polarity protection omitted - correct polarity must be verified before connection. ADL5904-EVALZ does not include onboard voltage regulation.

Is thermal management provided on ADL5904-EVALZ for extended high-temperature operation?

Yes, ADL5904-EVALZ incorporates thermal design aligned with the ADL5904's CP-16-22 LFCSP package: the exposed pad is soldered to a large internal copper pour connected to multiple thermal vias, and the board layout follows JEDEC 4-layer thermal guidelines (θJA = 80.05°C/W). This enables reliable operation across the full −40°C to +105°C range specified for the ADL5904 IC. No heatsink is required for typical lab use, but forced airflow improves margin at sustained +105°C ambient.