Analog Devices Inc. EVAL-ADF7021DBZ2

Overview

EVAL-ADF7021DBZ2 from Analog Devices is a fully assembled, USB-powered evaluation board for the ADF7021 narrow-band FSK transceiver IC. It enables rapid prototyping of sub-GHz wireless systems operating in 862–950 MHz and 80–650 MHz bands, supporting 2FSK/3FSK/4FSK modulation at data rates up to 32.8 kbps, with programmable output power (−16 to +13 dBm) and −130 dBm receiver sensitivity at 100 bps. It targets ETSI EN 300 220, FCC Part 15/90/95, and ARIB STD-T67 compliant applications.

For engineers reviewing the EVAL-ADF7021DBZ2 datasheet, EVAL-ADF7021DBZ2 pinout, EVAL-ADF7021DBZ2 application, or EVAL-ADF7021DBZ2 equivalent, this board provides validated RF layout, calibrated image rejection, integrated T-stage harmonic filtering, on-board crystal reference (10 MHz), and SPI interface access - all critical for evaluating ADF7021-based narrow-band ISM radio designs before custom PCB spin.

Technical Context

The EVAL-ADF7021DBZ2 implements the ADF7021 transceiver in a dual-VCO architecture: one internal inductor VCO for 862–950 MHz and 431–475 MHz (RF divide-by-2), and one external inductor VCO for 80–650 MHz and 40–325 MHz (RF divide-by-2). It uses a low-IF receiver (100 kHz IF) with programmable 12.5/18.75/25 kHz filter bandwidths and supports Gaussian/raised cosine spectral shaping to meet stringent regulatory mask requirements.

It integrates full digital control via a 3-wire SPI interface, on-chip 7-bit ADC for RSSI/temperature/battery monitoring, automatic PA ramp control, and patent-pending on-chip image rejection calibration - eliminating need for external RF sources during production test. The board includes matching networks optimized for 915 MHz (39 + j61 Ω PA load, 24 − j60 Ω LNA input) and supports AFC with ±1.5×IF_BW pull-in range.

Key Specifications

Availability

EVAL-ADF7021DBZ2 is available at Aetrix Electronics and suitable for wireless metering, remote security systems, and industrial process control requiring stable component supply, pre-validated RF performance, and fast time-to-demonstration.

Supply support for EVAL-ADF7021DBZ2 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 EVAL-ADF7021DBZ2 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 regional regulatory standards.

FAQ

What is the primary function of the EVAL-ADF7021DBZ2?

The EVAL-ADF7021DBZ2 is an evaluation board for the ADF7021 narrow-band FSK transceiver IC. It provides a complete, ready-to-run hardware platform - including matched RF front-end, crystal reference, USB interface, and SPI headers - enabling engineers to validate ADF7021 functionality, RF performance, and regulatory compliance without designing custom PCBs. The EVAL-ADF7021DBZ2 supports all ADF7021 features: dual-band operation, programmable modulation, and on-chip calibration routines.

Does the EVAL-ADF7021DBZ2 support both 868 MHz and 433 MHz bands out of the box?

Yes, the EVAL-ADF7021DBZ2 supports both bands via its dual-VCO architecture: the internal inductor VCO covers 862–950 MHz (including 868 MHz) and 431–475 MHz (including 433 MHz) in RF divide-by-2 mode, while the external inductor VCO covers 80–650 MHz (including 433 MHz). Matching networks are pre-tuned for 915 MHz and 426 MHz; minor component changes (per datasheet AN-1249) enable optimal 433 MHz or 868 MHz operation on the same EVAL-ADF7021DBZ2 board.

How does the EVAL-ADF7021DBZ2 simplify image rejection calibration?

The EVAL-ADF7021DBZ2 implements Analog Devices' patent-pending on-chip image rejection calibration, which eliminates the need for external RF signal sources during setup. Using only the ADF7021's internal circuitry and the board's calibrated components, the EVAL-ADF7021DBZ2 achieves >50 dB image rejection (e.g., 53 dB at 450 MHz) after running the built-in calibration routine - significantly reducing test time and cost compared to manual alignment methods required by discrete RF solutions.

Can the EVAL-ADF7021DBZ2 be used for FCC or ETSI certification testing?

The EVAL-ADF7021DBZ2 is not a certified end-product but serves as a pre-validated reference design for certification. Its layout follows Analog Devices' RF best practices, includes T-stage harmonic filtering, and delivers measured spurious emissions (e.g., −52 dBc second harmonic) and occupied bandwidth (e.g., 9.9 kHz at 25 kHz spacing) that meet FCC Part 15.247 and ETSI EN 300 220 limits. Engineers use the EVAL-ADF7021DBZ2 to characterize ADF7021 performance early, then replicate its proven RF section in final certified designs.

What software and drivers are required to operate the EVAL-ADF7021DBZ2?

The EVAL-ADF7021DBZ2 requires Analog Devices' ADF7021 Evaluation Software (v3.0+), which runs on Windows and communicates via USB-to-SPI bridge. No additional drivers are needed beyond standard Windows USB CDC ACM class support. The software provides register-level control, real-time RSSI/temperature readback, packet transmission/reception, and automated calibration sequences - all tested and verified for the EVAL-ADF7021DBZ2 hardware configuration.