Analog Devices Inc. AD8302-EVALZ

Overview

AD8302-EVALZ from Analog Devices is an evaluation board designed to characterize the AD8302 RF/IF gain and phase detector IC, supporting measurements from DC to 2.7 GHz with ±30 dB gain range and 0°–180° phase range. It enables rapid validation of magnitude ratio (30 mV/dB) and phase difference (10 mV/degree) outputs in RF power control, PA linearization, and VSWR monitoring applications.

For engineers reviewing the AD8302-EVALZ datasheet, AD8302-EVALZ pinout, AD8302-EVALZ application, or AD8302-EVALZ equivalent, this board provides calibrated signal paths, on-board SMA connectors, adjustable filter capacitors (MFLT/PFLT), user-configurable MSET/PSET setpoints, and direct access to VMAG/VPHS/VREF for oscilloscope-based dynamic response analysis and controller-mode testing.

Technical Context

The AD8302-EVALZ implements a complete test platform for the AD8302 IC, featuring matched 50 Ω input paths with AC coupling, onboard 2.7 V–5.5 V supply regulation, and configurable low-pass filtering via MFLT and PFLT terminals. It supports both measurement mode (VMAG shorted to MSET, VPHS shorted to PSET) and controller mode (open-loop feedback).

Signal integrity is maintained through ground-plane isolation, controlled-impedance traces, and decoupling networks at INPA/INPB, OFSA/OFSB, and VPOS. The board includes test points for all 14 pins of the AD8302 TSSOP package, enabling real-time probing of VMAG, VPHS, VREF, and bias nodes under varying RF input conditions up to –60 dBm to 0 dBm.

Key Specifications

Availability

AD8302-EVALZ is available at Aetrix Electronics and suitable for RF test equipment development, wireless infrastructure validation, microwave subsystem calibration, and academic RF measurement labs requiring stable component supply and documented reference design support.

Supply support for AD8302-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, serving precision instrumentation, communications, industrial, and aerospace markets.

The AD8302-EVALZ belongs to Analog Devices' RF & Microwave Evaluation Platform family, engineered to accelerate prototyping and performance verification of RF gain/phase measurement ICs in real-world signal chain environments.

FAQ

What is the purpose of the AD8302-EVALZ evaluation board?

The AD8302-EVALZ is a dedicated evaluation platform for the AD8302 RF/IF gain and phase detector IC. It provides a fully assembled, tested PCB with SMA inputs, regulated power, accessible test points, and configurable filtering to enable immediate characterization of gain (±30 dB, 30 mV/dB) and phase (0°–180°, 10 mV/degree) measurement accuracy across DC–2.7 GHz. Engineers use AD8302-EVALZ to validate signal chain behavior before integrating the AD8302 into final designs.

Does AD8302-EVALZ support controller-mode operation of the AD8302 IC?

Yes, AD8302-EVALZ supports both measurement and controller modes. Jumper options allow breaking the feedback paths between VMAG↔MSET and VPHS↔PSET, enabling external control loops. This lets users drive variable gain amplifiers or phase shifters using AD8302-EVALZ's VMAG and VPHS outputs while applying independent setpoint voltages to MSET and PSET - directly validating closed-loop PA linearization or beamforming algorithms with the AD8302 IC.

What RF input power levels can be applied to AD8302-EVALZ?

AD8302-EVALZ accepts input signals from –60 dBm to 0 dBm (re: 50 Ω) at INPA and INPB, matching the AD8302 IC's specified dynamic range. The board uses AC-coupled SMA paths with 3 kΩ nominal input impedance at low frequencies and maintains signal integrity up to 2.7 GHz via controlled-impedance routing. Input protection aligns with AD8302's absolute maximum rating of –3 dBV (10 dBm re: 50 Ω).

How is the reference voltage (VREF) accessed and used on AD8302-EVALZ?

VREF (1.8 V nominal, ±0.1 V over –40°C to +85°C) is brought out to a dedicated test point and header on AD8302-EVALZ. It serves as a stable, low-noise reference for repositioning the 0 V–1.8 V output range of VMAG and VPHS, enabling precise offset calibration and comparator threshold setting. The board includes decoupling capacitance per AD8302 datasheet recommendations to maintain PSRR < 0.25 mV/V across the 2.7 V–5.5 V supply range.

Can AD8302-EVALZ be used to measure phase and gain simultaneously?

Yes, AD8302-EVALZ enables true simultaneous acquisition of gain and phase data via its dual-output architecture. VMAG and VPHS are independently buffered and routed to separate test points, supporting concurrent oscilloscope capture at up to 30 MHz envelope bandwidth. This allows real-time correlation of amplitude and phase drift in RF power amplifiers, antenna tuning systems, or feedforward correction loops - a core capability confirmed by AD8302's functional block diagram and TPC 25–29 performance curves.