Analog Devices Inc. EVAL-ADF7021DBZ5

Overview

EVAL-ADF7021DBZ5 from Analog Devices is a fully assembled, USB-powered evaluation board for the ADF7021 narrow-band FSK transceiver IC. It enables rapid RF performance validation across 80–650 MHz and 862–950 MHz bands, supports 2FSK/3FSK/4FSK modulation at data rates up to 32.8 kbps, and integrates on-board crystal reference, RF matching networks, and SMA antenna interface - used for ETSI EN 300 220 and FCC Part 15 compliant wireless metering and remote control prototyping.

For engineers reviewing the EVAL-ADF7021DBZ5 datasheet, EVAL-ADF7021DBZ5 pinout, EVAL-ADF7021DBZ5 application, or EVAL-ADF7021DBZ5 equivalent, this board delivers verified RF layout, calibrated image rejection, integrated power ramp control, and SPI-based register access - critical for validating transceiver sensitivity (−130 dBm @ 100 bps), programmable output power (−16 to +13 dBm), and AFC loop stability in licensed and ISM band designs.

Technical Context

The EVAL-ADF7021DBZ5 implements the ADF7021 transceiver IC in a low-IF architecture with dual VCOs (internal LC tank for 862–950 MHz; external inductor for 80–650 MHz), fractional-N PLL (<1 ppm resolution), and programmable IF filter bandwidths (12.5/18.75/25 kHz). It uses Gaussian and raised cosine spectral shaping to meet ARIB STD-T67 and ETSI EN 300 220 spectral mask requirements.

This board includes on-board temperature sensor readback via the ADF7021's integrated 7-bit ADC, automatic PA ramp control to suppress spectral splatter, and full digital control through a 3-wire SPI interface. The design incorporates T-stage harmonic filtering and calibrated LNA/PA impedance matching (e.g., 39 + j61 Ω at 915 MHz) to ensure regulatory-compliant transmit emissions and −50 dBc adjacent channel power.

Key Specifications

Availability

EVAL-ADF7021DBZ5 is available at Aetrix Electronics and suitable for wireless metering, remote security systems, and industrial process control requiring stable component supply, pre-validated RF layout, and regulatory test support.

Supply support for EVAL-ADF7021DBZ5 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 sensing, and power management.

The EVAL-ADF7021DBZ5 belongs to Analog Devices' RF transceiver evaluation platform family, designed specifically to accelerate development of narrow-band, license-free and licensed-band wireless systems compliant with ETSI, FCC, and ARIB standards.

FAQ

What is the primary function of the EVAL-ADF7021DBZ5?

The EVAL-ADF7021DBZ5 is an evaluation board for the ADF7021 narrow-band FSK transceiver IC. It provides a complete, ready-to-run hardware platform - including RF matching, crystal reference, USB interface, and SMA antenna connector - to validate transceiver performance, configure registers via SPI, and verify compliance with ETSI EN 300 220 and FCC Part 15. The EVAL-ADF7021DBZ5 does not contain a standalone IC but hosts the ADF7021 die in a functional system context.

Does the EVAL-ADF7021DBZ5 support both 433 MHz and 868 MHz operation out of the box?

Yes, the EVAL-ADF7021DBZ5 supports both 433 MHz and 868 MHz operation without hardware modification. Its dual-VCO architecture - internal inductor VCO for 862–950 MHz and external inductor VCO for 80–650 MHz - is implemented with appropriate matching networks and switchable filters. The board ships with pre-tuned components for 433 MHz and 868 MHz bands, and configuration is handled entirely through ADF7021 register settings.

How is RF calibration performed on the EVAL-ADF7021DBZ5?

RF calibration on the EVAL-ADF7021DBZ5 leverages the ADF7021's on-chip features: patent-pending image rejection (IR) calibration, IF filter coarse/fine calibration, and automatic frequency control (AFC). These are executed via SPI commands and require no external equipment. The board includes factory-trimmed passive components and documented calibration sequences in the ADF7021 datasheet Rev. D, enabling repeatable −56 dB image rejection and <0.5 kHz AFC accuracy.

Can the EVAL-ADF7021DBZ5 be used for FCC or ETSI certification testing?

The EVAL-ADF7021DBZ5 is intended for design verification and pre-compliance testing - not final certification. While it implements key features required for ETSI EN 300 220 and FCC Part 15 (e.g., spectral shaping, programmable output power, harmonic filtering), formal certification requires a final product enclosure, antenna integration, and conducted/radiated emissions testing per standard-specific procedures. The EVAL-ADF7021DBZ5 provides the validated RF front-end foundation for that process.

What software tools are compatible with the EVAL-ADF7021DBZ5?

The EVAL-ADF7021DBZ5 is supported by Analog Devices' official ADF7021 Evaluation Software (Windows-based), which provides GUI-driven register configuration, real-time RSSI monitoring, packet transmission/reception, and modulation analysis. It also works with ADIsimPLL™ for synthesizer modeling and third-party SPI debuggers that support 3-wire mode. No custom firmware or driver installation is needed beyond the included USB CDC virtual COM port.