This guide provides reference design details, schematics, and testing procedures for the Analog Devices CN-0251 flexible analog front-end circuit evaluation…
The document describes the CN-0251 Circuit Evaluation Board (EVAL-CN0251-SDPZ), a system demonstration platform designed to help solve analog, mixed-signal, and RF design challenges. It features a flexible analog front-end circuit engineered for quick and easy system integration.
| Resolution | 24-bit Sigma-Delta ADC |
|---|---|
| Input Range | Wide dynamic range from few mV p-p to 20 V p-p |
| Reference Voltage | 4.096 V |
| Supply Voltage | 5 V |
| Noise Performance (Peak-to-Peak) | Approximately 3.9 µV |
The circuit is suitable for industrial automation, process control, instrumentation, and medical device applications.
The board includes an ADG1409 multiplexer, AD8226 instrumentation amplifier, AD8475 differential amplifier, AD7192 ADC with ADR444 reference, and ADP1720 regulator.
The external RG resistor is omitted, resulting in a gain of 1 for the instrumentation amplifier stage.