Most solutions that interface with piezoelectric sensors are AC-coupled, lacking DC and sub-hertz measurement capabilities. The Analog Devices Inc. EVAL-CN0540-ARDZ is a DC-coupled solution in which DC and sub-hertz precision are achieved.
By looking at the complete data set from an IEPE vibration sensor in the frequency domain (DC to 50kHz), the type and source of a machine fault can be better predicted using the position, amplitude, and the number of harmonics found in the fast Fourier transform (FFT) spectrum.
The EVAL-CN0540-ARDZ features an Arduino-compatible form factor and can be interfaced and powered directly from most Arduino-compatible development boards.
The EVAL-CN0540-ARDZ incorporates a precision AD7768-1 24-bit, 1024kSPS Σ-Δ Analog-to-Digital Converter (ADC), and an LTC2606 16-bit Voltage Output Digital-to-Analog Converter (DAC). Used as the ADC driver is an ADA4945-1 High-Linearity Differential Amplifier and an LT3092 200mA Programmable 2-Terminal Current Source.
This reference design requires the EVAL-CN0540-ARDZ Board to be plugged into the Terasic Technologies DE10-Nano Carrier Board. The Carrier Board is required to power the EVAL-CN0540-ARDZ board, run the embedded Linux image, and capture and display the data.