Analog Devices Inc. CN0522 Circuit Evaluation Board (EVAL-CN0522-EBZ)

Analog Devices Inc. CN0522 Circuit Evaluation Board (EVAL-CN0522-EBZ) provides a reference design for a USB-powered, 915MHz power amplifier circuit based on the ADL5605 RF Driver Amplifier. The ADL5605 has an operating frequency range of 700MHz to 1GHz with a typical gain of 23.0dB. The CN0522 Circuit Evaluation Board is designed to optimize the RF signal of the ADL5605 for the unlicensed 915MHz ISM (Industrial, Scientific, and Medical) radio frequency band.

The Analog Devices Inc. EVAL-CN0522-EBZ features standard 50Ω SMA coaxial connectors for its RF signal path. For easy integration with RF systems, a male connector is used for the RF input, and a female connector is used for the RF output. Coplanar waveguides are used for the RF traces on the board, which have a characteristic impedance of 50Ω.

Power to the CN0522 is supplied through a micro-USB port and regulated by an LTM8045 μModule. This small, standalone DC-to-DC converter simplifies the regulator circuit design because it already includes a current-mode controller and power devices for a low noise amplifier power supply. The Evaluation Board also includes an ADT6402 Temperature Switch to disable the amplifier when the board temperature reaches a trip point.

Features

Optimized for the 915MHz ISM Band
1W Power Amplifier
Overtemperature management prevents damage to components
Powered via Micro-USB input (+5V_DC)
50Ω SMA RF input and output connectors

25.4mm x 36.957mm x 1.5748mm form-factor
Key components
- ADL5605 700MHz to 1GHz 1W RF Driver Amplifier
- ADT6402 Temperature Sensor
- LTM8045 μModule DC-DC Converter

Required Equipment

EVAL-CN0522-EBZ
Keysight^® E5061B Vector Network Analyzer
Rohde & Schwarz^® SMA100A Signal Generator
Rohde & Schwarz FSUP Signal Source Analyzer
5V AC/DC USB power adapter

USB Type A to micro-USB cable
SMA cables
20dB attenuator (optional for input protection of the signal source analyzer)

The EVAL-CN0522-EBZ can also use the ADALM-PLUTO Active Learning Module as a signal generator, connected to the RF input. Do not directly connect the RF output of the EVAL-CN0522-EBZ to the Rx port of the ADALM-PLUTO. The maximum RF input that the ADALM-PLUTO can safely handle is +2.5dBm.

Design & Integration Files

The Design and Integration Files include schematics, bill of materials, Gerber files, Allegro layout files, assembly drawings, and documentation for the Analog Devices Inc. CN0522 Circuit Evaluation Board (EVAL-CN0522-EBZ).