Selectable acceleration range and sensitivity
The LIS3DH is a three-axis digital accelerometer from STMicroelectronics with user-selectable full-scale ranges of ±2g, ±4g, ±8g, and ±16g. Sensitivity scales inversely with range: 1000 LSB/g at ±2g down to 83 LSB/g at ±16g — the ±2g setting gives the finest resolution for low-vibration monitoring, while ±16g suits impact or high-shock events where the full dynamic range is needed. Output data rate is programmable from 0.5 Hz to 625 Hz via the on-chip adjustable bandwidth filter. A 625 Hz ODR captures vibration signatures up to roughly 300 Hz (Nyquist), adequate for bearing monitoring or tilt sensing in industrial equipment; the 0.5 Hz floor is useful for long-period inclination or low-power wake-on-motion applications.
Digital interface and supply integration
Communication is through either I²C or SPI — the CS pin selects the bus. The 16-LGA package (3x3 mm body, 0.5 mm pitch) is a surface-mount land-grid array with an exposed pad on the bottom. The centre pad should be soldered to a PCB ground plane for both mechanical stability and thermal conduction — the LGA footprint is standard for MEMS accelerometers and reflow profiles follow JEDEC J-STD-020 for moisture-sensitive devices.
Temperature range and on-chip features
The on-chip temperature sensor provides a relative reading for offset compensation across the thermal envelope — useful when the accelerometer is mounted near a heat source on the PCB and the zero-g offset drifts with the die temperature. Additional integrated features include selectable scale and adjustable bandwidth, which reduce the external component count — no separate filter capacitors or gain-setting resistors are needed. The digital output eliminates the ADC channel requirement on the host MCU, saving two to three pins compared to an analog accelerometer.
STMicroelectronics has marked the LIS3DH as Obsolete.