Micro-Inertial Measurement Unit (IMU chip)
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  • Micro-Inertial Measurement Unit (IMU chip)

Micro-Inertial Measurement Unit (IMU chip)

Product Features ● Automotive-grade ● Integrated inertial sensor ● LGA package ● ASIL B-level functional safety ● Full temperature compensation ● High reliability



Product Introduction

The Micro Inertial Measurement Unit (IMU chip) is a single-device integrated inertial sensor designed for use in automotive applications such as airbag controllers, transmission systems, under-passenger seats, or in the luggage compartment. It features three-axis gyroscopes and three-axis accelerometers. Developed in accordance with the ISO 26262 standard, this IMU is suitable for system applications meeting the ASIL B safety level and can also be used in systems up to ASIL D, fully complying with decomposition rules as well as all necessary requirements and analyses.

Performance metrics

Spinning top Accelerometer System
Measurement range ±250 to ±2000 * /s Measurement range ±2 to ±16 g Supply voltage 3.3V ± 0.17 V
Scale factor (300°/s) 100 LSB/* /s Scale factor (16g) 2000 LSB/g Operating current 5 mA
Scale factor nonlinearity (±300° %) ±0.05 % Scale factor nonlinearity (±16g) ±0.5 % Operating temperature range -40~+125 Celsius
Zero bias ≤3 * /s Zero bias ≤35 mg Shock-resistant ≥2000 g
Zero-bias instability 5 * /h Zero-bias temperature sensitivity (after temperature compensation) 2 mg Size 5 × 5 × 1.45 mm
Angular Random Walk 0.5 * */h Zero-bias temperature hysteresis 0.5 mg Weight To be determined g
Noise (50Hz/400Hz) 0.1/0.3 * /s rms Noise (50Hz/400Hz) 2/6 mg RMS Interface Type SPI --
Bandwidth (Filter 1) 50~400 Hertz Bandwidth (Filter 1) 100~400 Hertz      
Bandwidth (Filter 2) 12.5~100 Hertz Bandwidth (filter) 25~100 Hertz      

Application fields

●Level 2 Automated Driving

● Location-based application

● Advanced Driver Assistance Systems (ADAS) features

Main dimensions and interface definitions

Pin Definition Instructions
1 CSB Chip Select Bar
2 SCK SPI serial clock
3 MOSI SPI serial data input
4 MISO SPI serial data output
5 NC No Connection
6 Reset External Reset Signal, Low Active
7 BUS_ID_1 BUS ID1 for Sensor Identification
8 BUS_ID_0 BUS ID0 for Sensor Identification
9 NC No Connection
10 NC No Connection
11 NC No Connection
12 NC No Connection
13 GND Ground
14 VDD Power Supply (+3.3V)
15 DGND Digital Ground
16 VDD10 Chip Digital I/O Supply
Note: The NC pin remains floating.

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