IAM-20381 - High Performance 3-Axis MotionTracking Accelerometer

The IAM-20381 is a 3-axis MotionTracking accelerometer for Automotive applications in a small 3x3x0.75 mm (16-pin LGA) package. It also features a 512-byte FIFO that can lower the traffic on the serial bus interface and reduce power consumption by allowing the system processor to burst read sensor data and then go into a low-power mode. IAM-20381, with its 3-axis integration, enables manufacturers to eliminate the costly and complex selection, qualification, and system level integration of discrete devices, guaranteeing optimal motion performance.

The accelerometer has a user-programmable accelerometer full-scale range of ±2g, ±4g, ±8g, and ±16g. Factory-calibrated initial sensitivity of both sensors reduces production-line calibration requirements.

Other industry-leading features include on-chip 16-bit ADCs, programmable digital filters, an embedded temperature sensor, and programmable interrupts. The device features I2C and SPI serial interfaces, a VDD operating range of 1.71V to 3.6V, and a separate digital IO supply, VDDIO from 1.71V to 3.6V.

Product Details

Part # Accel Full Scale Range Accel Sensitivity Digital Output Logic Supply Voltage Operating Voltage Supply Package Size
UNITS: (g) LSB/g (V) (V +/-5%) (mm)
±2, ±4, ±8, ±16 16384
I2C or SPI VDD 1.71V–3.6V 3x3x0.75

Documentation & Resources


  • Digital-output X-, Y-, and Z-axis accelerometer with a programmable full scale range of ±2g, ±4g, ±8g, and ±16g and integrated 16-bit ADCs
  • User-programmable digital filters for accelerometer, and temperature sensor
  • Self-test
  • Wake-on-motion interrupt for low power operation of applications processor
  • Reliability testing performed per AEC–Q100
    • PPAP and qualification data available upon request