Tiny automotive MEMS motion sensors offer 16-bit precision

TDK Corp., through its InvenSense subsidiary, rolled out a new line of automotive high-accuracy MEMS motion sensors at CES 2019. These include the “MotionTracking” automotive-qualified IAM-20680 and IAM-20680HP six-axis inertial measurement units (IMUs), which expand TDK’s existing line of automotive sensors that include the IAM-20380 gyroscope and IAM-20381 three-axis accelerometer . The automotive MEMS sensors can help improve the absolute position of a vehicle in GNSS- and GPS-poor environments, such as tunnels, parking garages, and urban canyons.

Here’s the automotive sensor lineup:

  • Touted as the smallest six-axis automotive-qualified sensor (combining a three-axis gyroscope and a three-axis accelerometer), the IAM-20680 is claimed as the industry’s only device featuring 16-bit accelerometers and 16-bit gyroscopes in a series production car today. The operating temperature range is –40°C to 85°C.
  • If you’re looking for a beefier and higher-temperature-range IMU, the IAM-20680HP, a high-performance version of the IAM-20680, offers an extended operating temperature range of –40°C to 105°C and high gyroscope and offset thermal stability. It is pin-, package-, and register-compatible with the IAM-20680.
  • The IAM-20380, with an operating temperature range of –40°C to 85°C, is claimed as the only automotive-qualified gyroscope fully compatible (pin, package, register, and software) with a three-axis automotive accelerometer (IAM-20381) and an automotive-qualified six-axis device (IAM-20680).
  • Similarly, the IAM-20381, with an operating temperature range of –40°C to 85°C, is touted as the only automotive-qualified three-axis accelerometer fully compatible (pin, package, register, and software) with a three-axis automotive gyroscope (IAM-20380) and an automotive-qualified six-axis device (IAM-20680).

Key specs include:

  • Gyroscope full-scale: ±250°/s, ±500°/s, ±1,000°/s, ±2,000°/s
  • Accelerometer full-scale: ±2g, ±4g, ±8g, ±16g
  • Embedded temperature sensor
  • 16-bit output for accelerometer, gyroscope, and temperature sensor
  • SPI and I²C serial interface
  • 512-bit FIFO
  • 16-pin LGA package (3 × 3 × 0.75 mm)

2 thoughts on “Tiny automotive MEMS motion sensors offer 16-bit precision

  1. “It isn't surprising anymore for us to be experiencing constant upgrades when the tech sector is concerned. As we are all aware by now, demand from end users is bound to rise. Therefore, it is indeed an essential to the industry for improvements to be made

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  2. “I wonder just what kind of capabilities a gyroscope of this nature would be able to provide to its host device. I reckon that everything these days requires some degree of control from the user, but it's technologies like this that are trying to set up de

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