SmartIndustrial™ Industrial MEMS Motion Sensors

Hi everyone,

I’m working on a low-power device using the IIM-42351 or IIM-42352. The device is intended to go into sleep mode when no movement is detected, and wake up the microcontroller using the wake-on-motion interrupt when motion is sensed.

The following is said about IIM-46234: "The performance of the thermal related specification was improved by performing custom thermal calibration for every module in the temperature range (-40 to 85°C)."
I understand this means that the thermal bias is achieved to be 0 when the sensor is at 25 ºC.
Are the measured biased (in the temperature range -40 to +85ºC) provided to the user along with the unit, for each bought unit?
(that info, if provided, can be used by the user to compensate the bias with the measured temperature for the IIM-46234)

Dear TDK support.

Could you help me figure out with reading of measurements for IIM 42352?
At the beginning I want to read data by request without FIFO and afterwords use FIFO.

Hello TDK support

Our company is using the iim42652 sensor with a custom driver to implement a "shock detection".
When the MCU goes to a low power hibernation mode, it should be woken up again when there is a sudden high acceleration.
The WOM and SMD feature of the iim42652 seems to fit our purpose.

Hi,

I am trying to interface IIM-42352 with our TI controller, I am able to use SPI interface between them and run example-self-test and example-raw-data-registers successfully. But when I am testing the example-raw-data, the accel and temp data read from FIFO is constant even when I am moving the sensor. I suspect the issue might be the way the example reads the FIFO is incorrect or FIFO not getting updated with latest values.

We have produced thousands of vibration sensors with IIM-42351 and IIM-42352. We don't find any problem in the development stage. However, after deployment, our customer reports malfunctions and defects. The issues with defects are mainly divided into two categories.
First, some sensors' out value for the Z axis is stuck at 32767 (the maximum possible output value for a 16-bit integer). With some impact on the sensor, measurement can be back to normal. But is easily stuck again at times.
Second, the measurement value may drift more than 10% in a month for some sensors.

Hello,
is it possible to disable the low pass filtering on the acceleration and gyro channels? Apparently, the sensors can be sampled at 8 kHz, but this is not that useful if the highest filter cutoff values are at 400 Hz and 60 Hz for the accelerometer and gyroscope respectively. (Values from data sheet tables 14, 15, 16)

Thanks in advance

We would like to use the IIM-42351 with an external clock.
The IIM-42351 is powered with 3.3V. Unfortunately, the data sheet does not clearly indicate which minimum and maximum voltage is possible at the CLKIN input.
Can someone help me?
For example, I would like to use a SIT1533.
Thanks in advance

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Hello,

We have ~10,000 devices with a iim 42652 and are looking to provide a software update to our users to better utilize the IMU capabilities. Unfortunately, we are not currently calibrating the IMUs.

Our devices are communicating with the IMU directly via SPI.

We have been reading through the data sheet and the eMD documentation, but would really appreciate some guidance on a path forward for utilizing the example code to properly calibrate the gyroscope, etc. (like in 5.2 Example Algorithm or 5.9 SELF-TEST EXAMPLE)