Analog Devices Inc. EVAL-AD831EBZ

Overview

EVAL-AD831EBZ from Analog Devices is an evaluation board designed to accelerate prototyping and performance validation of the AD831 low-distortion, doubly balanced RF mixer IC. It supports full characterization of RF-to-IF downconversion, direct-to-baseband operation, and quadrature demodulation with confirmed 500 MHz RF/LO bandwidth, +24 dBm output-referred IP3 at –10 dBm LO drive, and dual- or single-supply operation (±4.5 V to ±5.5 V or +9 V to +11 V). The board enables rapid testing in HF/VHF receiver, ultrasound Doppler, and DMR base station applications.

For engineers reviewing the EVAL-AD831EBZ datasheet, EVAL-AD831EBZ pinout, EVAL-AD831EBZ application, or EVAL-AD831EBZ equivalent, this page delivers verified layout implementation details, supply configuration options (dual ±5 V or single +9 V), IF output interface modes (differential current or single-ended voltage), DC coupling support across all ports, and user-programmable bias for dynamic range vs. power tradeoffs - critical for RF system integration and mixer selection.

Technical Context

The EVAL-AD831EBZ implements the AD831 monolithic mixer in a fully populated, impedance-matched PCB layout optimized for bench evaluation. It replicates the reference design from Analog Devices' AD831 datasheet (Rev. D), including transformer-coupled RF input, single-ended LO drive, dual 50 Ω terminations, and selectable IF output paths: open-collector differential current (IFP/IFN) or buffered single-ended voltage (OUT/VFB) with gain-setting resistor network.

Board-level features include feedthrough decoupling networks on ±VS supplies, shielded enclosure compatibility, short-path routing between OUT and VFB to minimize peaking, and provision for external low-pass filtering (e.g., 82 pF capacitors across IFP/IFN for ~140 MHz cutoff in downconversion). It supports both ±5 V dual-supply and +9 V single-supply configurations per Figures 9 and 10 of the AD831 datasheet.

Key Specifications

Availability

EVAL-AD831EBZ is available at Aetrix Electronics and suitable for RF receiver development, ultrasound imaging systems, DMR base station second mixing stages, and quadrature modulation/demodulation requiring stable component supply and validated reference design implementation.

Supply support for EVAL-AD831EBZ 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, with deep expertise in RF, precision instrumentation, and signal chain solutions.

The EVAL-AD831EBZ belongs to Analog Devices' RF & Microwave Evaluation Platform family, engineered to provide turnkey validation environments for high-linearity active mixers used in communications infrastructure, medical imaging, and test equipment.

FAQ

What is the primary function of the EVAL-AD831EBZ?

The EVAL-AD831EBZ is an evaluation board specifically built to demonstrate and validate the performance of the AD831 low-distortion active mixer IC. It provides a complete, pre-layout PCB with matched impedances, proper decoupling, and configurable interfaces for RF, LO, and IF signals - enabling engineers to verify key specs like +24 dBm IP3, 500 MHz bandwidth, and DC-coupled operation without custom design effort. The EVAL-AD831EBZ does not contain a standalone IC but hosts the AD831APZ device.

Does the EVAL-AD831EBZ support both dual-supply and single-supply operation?

Yes, the EVAL-AD831EBZ supports both configurations as specified in the AD831 datasheet. It can operate from ±4.5 V to ±5.5 V dual supplies (with GND referenced midpoint) or from a +9 V to +11 V single supply (with COM biased to V_S/2 via resistive divider). Jumper options and silkscreen markings guide correct power connection, and the board includes dedicated pads for feedthrough capacitor installation in either mode.

How is the IF output configured on the EVAL-AD831EBZ?

The EVAL-AD831EBZ provides two IF output paths: (1) differential current outputs at pins IFP and IFN (accessible via SMA connectors or test points), supporting transformer or capacitor coupling up to 250 MHz; and (2) single-ended voltage output at pin OUT (SMA connector), with gain set by resistor between OUT and VFB. The board includes solder jumpers to select between these modes and supports external low-pass filtering (e.g., 82 pF caps across IFP/IFN) per AD831 TPC 4 and Figure 4.

Can the EVAL-AD831EBZ be used for quadrature demodulation?

Yes - the EVAL-AD831EBZ's layout and signal routing follow the AD831 datasheet's quadrature demodulation guidance (Figure 11). While a single board hosts one AD831, its RF and LO input traces are designed for parallel connection with a second EVAL-AD831EBZ board. When two boards are synchronized with phase-quadrature LO signals, their IF outputs deliver independent in-phase (I) and quadrature (Q) baseband streams - validated for ultrasound imaging and software-defined radio applications.

What documentation and resources accompany the EVAL-AD831EBZ?

The EVAL-AD831EBZ ships with the official Analog Devices user guide UG-171 (Rev. A), which includes schematic diagrams, bill of materials, PCB layout files (Gerber), assembly drawings, and step-by-step setup instructions. All performance data - including measured IP3, noise figure, and isolation - is traceable to the AD831 datasheet Rev. D test conditions. No additional firmware, drivers, or software tools are required for basic RF/IF characterization.