Analog Devices Inc. AD8361-EVALZ

Overview

AD8361-EVALZ from Analog Devices is an evaluation board for the AD8361 TruPwr™ true RMS RF power detector IC, supporting 0.1 MHz to 2.5 GHz operation with ±0.25 dB linear response, 7.5 V/V_rms conversion gain, and single-supply (2.7–5.5 V) operation. It enables rapid characterization of RF transmitter/receiver power measurement in CDMA, W-CDMA, and QAM systems.

For engineers reviewing the AD8361-EVALZ datasheet, AD8361-EVALZ pinout, AD8361-EVALZ application, or AD8361-EVALZ equivalent, this board provides validated reference design, calibrated test points, on-board input matching (50 Ω), configurable output reference modes (ground/internal/supply), and FLTR capacitor support for low-frequency averaging - critical for evaluating complex-modulation waveform detection accuracy.

Technical Context

The AD8361-EVALZ implements a complete, ready-to-use test platform for the AD8361 monolithic rms detector, featuring factory-calibrated input coupling network (75 Ω shunt + 100 pF AC-coupling), decoupled 3 V/5 V supply rails, and jumper-selectable output reference mode (GRM/IRM/SRM). It supports direct connection to signal generators and oscilloscopes via SMA connectors and test points.

Board-level functionality includes PWDN-controlled power-down (<1 µA), FLTR pin access for external averaging capacitors (e.g., 0.01 µF), and thermal management compatible with −40°C to +85°C operating range validation. All critical signals - RFIN, VRMS, PWDN, FLTR, VPOS, COMM - are routed with controlled impedance and labeled for probing.

Key Specifications

Availability

AD8361-EVALZ is available at Aetrix Electronics and suitable for RF power calibration labs, wireless base station development, 5G small-cell prototyping, and cellular infrastructure testing requiring stable component supply and traceable evaluation hardware.

Supply support for AD8361-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 AD8361-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform product line, designed specifically to accelerate validation of true-RMS RF power detectors in complex-modulation environments including CDMA, W-CDMA, and LTE.

FAQ

What is the primary function of the AD8361-EVALZ?

The AD8361-EVALZ is a fully assembled and tested evaluation board for the AD8361 TruPwr™ true RMS RF power detector IC. It provides immediate hardware access to all device pins, calibrated input matching, configurable output reference modes, and standardized test interfaces - enabling engineers to validate RF power measurement performance across 0.1 MHz to 2.5 GHz without custom PCB design.

Does the AD8361-EVALZ support both SOT-23 and MSOP packages of the AD8361?

Yes, the AD8361-EVALZ accommodates both the 6-lead SOT-23 and 8-lead MSOP variants of the AD8361. The board includes dual footprint pads and silk-screened outlines for each package type, with appropriate routing for pin compatibility - including dedicated IREF/SREF jumpers that align with MSOP-only features while remaining safe for SOT-23 use (where only ground reference mode is active).

How is input impedance matched to 50 Ω on the AD8361-EVALZ?

The AD8361-EVALZ achieves broadband 50 Ω input matching using a 75 Ω surface-mount shunt resistor in parallel with the AD8361's nominal 225 Ω input impedance, combined with a 100 pF AC-coupling capacitor as specified in Analog Devices' Figure 36–38 and Application Information section. This network delivers <1.5:1 VSWR from 100 MHz to 2.5 GHz when used with the onboard SMA connector.

Can the AD8361-EVALZ be used to evaluate complex waveforms like W-CDMA or OFDM?

Yes, the AD8361-EVALZ supports complex-modulation evaluation through its FLTR pin interface, which allows addition of external averaging capacitors (e.g., 0.01 µF) to extend the internal filter's time constant - essential for accurate rms detection of low-kHz envelope variations in W-CDMA 15-channel or IS95 reverse-link signals, as confirmed in Figure 8 and Figure 11 of the AD8361 datasheet Rev. F.

What power supply requirements does the AD8361-EVALZ have?

The AD8361-EVALZ operates from a single 2.7 V to 5.5 V DC supply, delivered via screw terminal or header. On-board decoupling includes 100 pF ceramic and 0.01 µF tantalum capacitors at VPOS, meeting AD8361 quiescent current (1.1 mA typical) and fast power-down (<1 µA) requirements. No external regulators or negative supplies are needed.