ICM-45686，TDK InvenSense SmartMotion™Series 6-axis high-performance MEMS IMU, integrating 3-axis gyroscope + 3-axis accelerometer.

ICM-45686，TDK InvenSense SmartMotion™The Series 6-Axis High-Performance MEMS IMU integrates a 3-axis gyroscope and a 3-axis accelerometer, featuring the industry's first BalancedGyro technology.™The Balanced Gyroscope Architecture, featuring low noise, vibration resistance, minimal temperature drift, and low power consumption, is the consumer-grade high-end motion tracking chip TDK InvenS....。

Package: LGA, 2.5 × 3 × 0.81 mm, ultra-thin small surface-mount package.

Brand: TDK (InvenSense)

Focus areas: AR/VR, mobile phone OIS, high-end wearables, drones, game controllers, and spatial motion sensing.

II. Core Performance Parameters

✅Gyroscope (Gyro)

Measurement range: ±15.625 ~ ±4000 dps (multiple settings available, with a maximum of 4000 dps for large dynamic range; highest setting reaches 4000 dps with high dynamic capability)

Noise: 3.8 mdps/√Hz, extremely low noise at the same level.

Temperature drift: ±0.005 °/s/°C, with extremely strong temperature stability.

Shock resistance: Up to 20,000g, resistant to SMT welding stress and drop impact.

✅Accelerometer (Accel)

Measurement range: ±2g to ±32g

Noise: 70 μg/√Hz

Temperature drift: ±0.15 mg/°C

✅Power Consumption (Key Advantage)

Low-power mode, 6-axis: ~220 μA

Low Noise Mode, 6-axis: ~420 μA

The industry's first dedicated low-power mode for gyroscopes significantly extends battery life in devices powered by batteries, as seen in uat.invens...

✅Interfaces and Storage

Host Interface: I³CSM / I²C / SPI

AUX Auxiliary Dual Interfaces: SPI Slave (directly connected to the OIS image stabilization controller) / I2C Master (for external sensor connection)

FIFO: 8KB, 18~19-bit high-resolution data cache, reducing the reading burden on the MCU.

2 programmable interrupt pins

Built-in on-chip temperature sensor

✅APEX On-Chip Motion Engine (with built-in algorithms to reduce the burden on the main controller)

Built-in hardware motion detection, eliminating the need for real-time MCU computation: step counter, tilt detection, single/double-click, wrist lift wake-up, motion wake-up, fall detection, low/high G-force detection, significant motion recognition, gesture recognition, activity classification uat.invens...

III. Core Technology Highlights: BalancedGyro™

Traditional MEMS gyroscopes are prone to offset drift caused by vibration, temperature changes, and PCB bending stress; BalancedGyro™Adopts a symmetric resonant MEMS structure:

Significantly suppresses out-of-band vibration noise, maintaining stable orientation in vibrating environments.

Temperature drift is significantly reduced, decreasing the need for frequent calibration.

Resistance to zero-point offset introduced by SMT reflow soldering and PCB deformation, reducing production line calibration costs.

The noise index ranks among the top tier in consumer IMUs, making it highly suitable for AR/VR spatial positioning and lens OIS (optical image stabilization) shake reduction.

IV. Typical Application Scenarios

AR/VR headsets and VR controllers: spatial pose tracking to reduce motion sickness (vertigo).

Mobile phone OIS (Optical Image Stabilization): The AUX interface natively supports connection with OIS controller, making it is a major selling point of the ICM45686.

High-end wearable devices/earbuds: Low power consumption, wrist lift wake-up, motion recognition, posture detection.

Drones, autonomous vehicles, and robots: vibration resistance, high-speed motion posture perception.

Game controllers and spatial remotes: High-precision gesture and motion input

High-end IoT, Asset Fall Detection