ADCMXL3021BMLZ

ADCMXL3021BMLZ FEATURES

Triaxial, digital output MEMS vibration sensing module±50 g measurement rangeUltralow output noise density, 26 μg/√Hz (MTC mode)Wide bandwidth: dc to 10 kHz within 3 dB flatness (RTS mode)Embedded fast data sampling: 220 kSPS per axis6 digital FIR filters, 32 taps (coefficients), default options:High-pass filter cutoff frequencies: 1 kHz, 5 kHz, 10 kHzLow-pass filter cutoff frequencies: 1 kHz, 5 kHz, 10 kHzUser configurable digital filter option (32 coefficients)Spectral analysis through internal FFTExtended record length: 2048 bins per axis with userconfigurable bin sizes from 0.42 Hz to 53.7 HzManual or timer-based (automatic) triggeringWindowing options: rectangular, Hanning, flat topFFT record averaging, configurable up to 255 recordsSpectral defined alarm monitoring, 6 alarms per axisTime domain capture with statistical metricsExtended record length: 4096 samples per axisMean, standard deviation, peak, crest factor, skewness,and kurtosisConfigurable alarm monitoringReal-time data streaming220 kSPS on each axis by defaultUser programmable sample ratesBurst mode communication with CRC-16 error checkingStorage: 10 data records for each axisOn demand self test with status flagsSleep mode with external and timer driven wakeupDigital temperature and power supply measurementsSPI-compatible serial interfaceIdentification registers: factory preprogrammed serialnumber, device ID, user programmable IDSingle-supply operation: 3.0 V to 3.6 VOperating temperature range: −40°C to +105°CAutomatic shutdown at 125°C (junction temperature)23.7 mm × 27.0 mm × 12.4 mm aluminum package36 mm flexible, 14-pin connector interfaceMass: 13 g

ADCMXL3021BMLZ GENERAL DESCRIPTION

The ADcmXL3021 is a complete vibration sensing system thatcombines high performance vibration sensing (using micro-electromechanical systems (MEMS) accelerometers) with avariety of signal processing functions to simplify the developmentof smart sensor nodes in condition-based monitoring (CBM)systems. The typical ultralow noise density (26 μg/√Hz) in theMEMS accelerometers supports excellent resolution. The widebandwidth (dc to 10 kHz within 3 dB flatness) enables trackingof key vibration signatures on many machine platforms.The signal processing includes high speed data sampling(220 kSPS), 4096 time sample record lengths, filtering,windowing, fast Fourier transform (FFT), user configurablespectral or time statistic alarms, and error flags. The serialperipheral interface (SPI) provides access to a register structurethat contains the vibration data and a wide range of userconfigurable functions.The ADcmXL3021 is available in a 23.7 mm × 27.0 mm × 12.4 mmaluminum package with four mounting flanges to supportinstallation with standard machine screws. This package providesconsistent mechanical coupling to the core sensors over a broadfrequency range. The electrical interface is through a 14-pinconnector on a 36 mm flexible cable, which enables a widerange of location and orientation options for system matingconnectors.The ADcmXL3021 requires only a single, 3.3 V power supply andsupports an operating temperature range of −40°C to +105°C.

ADCMXL3021BMLZ APPLICATIONS

Vibration analysisCBM systemsMachine healthInstrumentation and diagnosticsSafety shutoff sensing