Analog Devices Inc. EVAL-ADF7021DBJZ

Overview

EVAL-ADF7021DBJZ from Analog Devices is an evaluation board for the ADF7021 narrow-band FSK transceiver IC, supporting 80–650 MHz and 862–950 MHz bands with 2FSK/3FSK/4FSK modulation, programmable output power (−16 dBm to +13 dBm), and −130 dBm receiver sensitivity at 100 bps. It enables rapid prototyping of ETSI EN 300 220, FCC Part 15/90/95, and ARIB STD-T67 compliant wireless metering and remote control systems.

For engineers reviewing the EVAL-ADF7021DBJZ datasheet, EVAL-ADF7021DBJZ pinout, EVAL-ADF7021DBJZ application, or EVAL-ADF7021DBJZ equivalent, this board provides full access to the ADF7021's SPI interface, RF I/O paths, on-chip ADC, temperature sensor, and AFC/RSSI functions - enabling validation of frequency agility, spectral shaping, low-power operation, and regulatory-compliant transmit mask performance in real-world narrow-band ISM band deployments.

Technical Context

The EVAL-ADF7021DBJZ implements a complete reference design for the ADF7021 transceiver IC, featuring dual-VCO architecture with internal LC tank (862–950 MHz) and external-inductor VCO (80–650 MHz), low-IF receiver (100 kHz IF), and integrated Tx/Rx switch. It supports Gaussian and raised cosine filtering, programmable IF bandwidths (12.5/18.75/25 kHz), and automatic image rejection calibration without external RF sources.

Board-level features include T-stage harmonic filtering for conducted emissions compliance, matched LNA/PA impedance networks per frequency band (e.g., 39 + j61 Ω at 915 MHz), and provisioned test points for RFOUT, RFIN, CLKOUT, and serial interface signals - all optimized for evaluating the ADF7021's 0.05–32.8 kbps data rate range and −40°C to +85°C industrial operating envelope.

Key Specifications

Availability

EVAL-ADF7021DBJZ is available at Aetrix Electronics and suitable for wireless metering, remote security systems, and private mobile radio development requiring stable component supply, pre-validated RF layout, and regulatory-compliant reference performance.

Supply support for EVAL-ADF7021DBJZ 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-ADF7021DBJZ belongs to Analog Devices' RF transceiver evaluation platform family, designed specifically to accelerate development of narrow-band, battery-powered, standards-compliant wireless links for industrial telemetry and smart infrastructure.

FAQ

What is the primary function of the EVAL-ADF7021DBJZ evaluation board?

The EVAL-ADF7021DBJZ evaluation board is a fully assembled and tested hardware platform for the ADF7021 narrow-band FSK transceiver IC. It provides immediate access to all critical RF and digital interfaces - including SPI, RFOUT, RFIN, CLKOUT, and ADC inputs - allowing engineers to validate modulation fidelity, receiver sensitivity, spectral mask compliance, and system-level timing without custom PCB design. The board implements the exact matching networks, filtering, and biasing specified in the ADF7021 datasheet Rev. D.

Does the EVAL-ADF7021DBJZ support both frequency bands listed for the ADF7021 IC?

Yes, the EVAL-ADF7021DBJZ supports both the 80–650 MHz band (using the external-inductor VCO path) and the 862–950 MHz band (using the internal-inductor VCO path) as defined in the ADF7021 datasheet. The board includes separate RF front-end sections with optimized matching components for each band, and jumpers allow selection between configurations. Performance metrics such as adjacent channel rejection and occupied bandwidth are verified per band per Table 2 and Table 3 of the ADF7021 Rev. D datasheet.

Can the EVAL-ADF7021DBJZ be used to verify regulatory compliance for ETSI EN 300 220 or FCC Part 15?

Yes, the EVAL-ADF7021DBJZ is explicitly referenced in the ADF7021 datasheet Rev. D for measurements supporting ETSI EN 300 220, FCC Part 15, Part 90, Part 95, and ARIB STD-T67 compliance. Its T-stage harmonic filter, calibrated image rejection, and Gaussian/raised cosine filtering implementation enable direct measurement of adjacent channel power (ACP), occupied bandwidth, and spurious emissions - all required for certification testing. However, final regulatory approval requires full-system testing in certified labs.

What interfaces does the EVAL-ADF7021DBJZ provide for host microcontroller connection?

The EVAL-ADF7021DBJZ provides a standard 3-wire SPI interface (SCLK, SDATA, SLE) compatible with common microcontrollers and DSPs, as documented in the ADF7021 datasheet Section "Serial Interface". It also exposes dedicated control lines (CE, TxRxCLK, TxRxDATA, SWD), analog monitor points (RSSI, temperature sensor output), and CLKOUT for clock synchronization. All digital signals are 3.3 V logic level and include series resistors for signal integrity.

Is the EVAL-ADF7021DBJZ compatible with the ADF7021's automatic frequency control (AFC) and image rejection calibration features?

Yes, the EVAL-ADF7021DBJZ fully supports the ADF7021's patent-pending AFC loop and on-chip image rejection calibration. The board routes all necessary calibration control signals (e.g., MUXOUT, CREG, VCO_ADJUST) and provides stable reference clock inputs (XTAL or TCXO). Calibration routines described in Sections "AFC Operation" and "Image Rejection Calibration" of the ADF7021 datasheet Rev. D execute identically on the EVAL-ADF7021DBJZ, delivering up to 56 dB image rejection and ±0.5 kHz AFC accuracy as specified.