High Performance Automotive Accelerometer

OVERVIEW

The IAM-20381 is a 3-axis MotionTracking accelerometer for Automotive applications in a small 3 × 3 × 0.75 mm³ (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.

• 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 according to AEC–Q100: PPAP and qualification data available upon request

• AN-IVS-0002A-00 – MEMS Motion Handling and Assembly Guide

• InvenSense Motion Sensor Universal Evaluation Board (UEVB) User Guide

Evaluation Board

• Universal Evaluation Board Schematics