Analog Devices Inc. EVAL-ADF7021DBZ6

Overview

EVAL-ADF7021DBZ6 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 programmable 2FSK/3FSK/4FSK modulation, −130 dBm receiver sensitivity at 100 bps, and +13 dBm output power. 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-ADF7021DBZ6 datasheet, EVAL-ADF7021DBZ6 pinout, EVAL-ADF7021DBZ6 application, or EVAL-ADF7021DBZ6 equivalent, this board provides full access to the ADF7021's SPI interface, RF I/O paths, ADC inputs, temperature sensor, and programmable PA/LNA matching networks - critical for validating spectral mask compliance, AFC loop stability, and low-power wake-up timing in battery-operated ISM band designs.

Technical Context

The EVAL-ADF7021DBZ6 implements the ADF7021 transceiver in a fully populated, calibrated reference design using discrete matching networks for both internal-inductor (862–950 MHz) and external-inductor (80–650 MHz) VCO operation. It integrates T-stage harmonic filtering, low-IF (100 kHz) receiver architecture, and on-board crystal oscillator circuitry with selectable 3.625–26 MHz reference input support.

Board-level features include jumper-selectable IF filter bandwidths (12.5/18.75/25 kHz), configurable RSSI/ADC readback via SPI, automatic PA ramp control circuitry, and image rejection calibration test points - all aligned with the ADF7021's patent-pending IR calibration scheme and fractional-N PLL settling time of 40 µs.

Key Specifications

Availability

EVAL-ADF7021DBZ6 is available at Aetrix Electronics and suitable for wireless metering, remote security systems, and private mobile radio applications requiring stable component supply, pre-validated RF performance, and regulatory-compliant reference designs.

Supply support for EVAL-ADF7021DBZ6 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-ADF7021DBZ6 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 regulatory standards.

FAQ

What is the primary function of the EVAL-ADF7021DBZ6?

The EVAL-ADF7021DBZ6 is an evaluation board for the ADF7021 narrow-band FSK transceiver IC. It provides a fully assembled, calibrated hardware platform to validate RF performance, SPI register configuration, modulation fidelity, and regulatory compliance - enabling rapid development of wireless metering, remote control, and telemetry systems before custom PCB spin.

Does the EVAL-ADF7021DBZ6 support both 433 MHz and 868 MHz ISM bands?

Yes, the EVAL-ADF7021DBZ6 supports both bands: the ADF7021 IC on the board operates across 80–650 MHz (using external inductor VCO) and 862–950 MHz (using internal inductor VCO). At 433 MHz, it uses the external-VCO path; at 868 MHz, it uses the internal-VCO path - both validated with matching networks and harmonic filtering per the ADF7021 datasheet.

Can the EVAL-ADF7021DBZ6 be used to verify AFC loop performance?

Yes, the EVAL-ADF7021DBZ6 enables full AFC loop validation: it exposes the ADF7021's programmable AFC pull-in range (0.5–1.5 × IF_BW), provides test points for VCO tuning voltage monitoring, and includes calibrated reference oscillator circuitry. The board's documented setup allows measurement of AFC response time (48 bits) and accuracy (±0.5 kHz) under real-world frequency offset conditions.

What RF filtering is implemented on the EVAL-ADF7021DBZ6?

The EVAL-ADF7021DBZ6 implements a T-stage harmonic filter (two inductors + one capacitor) on both transmit and receive paths, as specified in the ADF7021 datasheet for conductive spurious emission testing. This filter achieves >52 dBc suppression of second harmonics and >60 dBc suppression of third harmonics at +13 dBm output - critical for passing FCC Part 15 and ETSI EN 300 220 conducted emissions tests.

Is image rejection calibration supported on the EVAL-ADF7021DBZ6?

Yes, the EVAL-ADF7021DBZ6 supports the ADF7021's patent-pending on-chip image rejection (IR) calibration. It provides dedicated test points and documentation for executing the calibration routine, achieving up to 56 dB image rejection (e.g., 53 dB calibrated at 450 MHz with external inductor VCO), eliminating need for external RF sources during production alignment.