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ADXL345 highest data rate is 3200Hz , how can I get 30ksps or more using Teensy4.1
- Thread starter New_bee
- Start date
joepasquariello
Well-known member
I am trying to use ADXL345 to test for vibration in a machine. My colleague advised we try to achieve higher samples since we are going to connect ESP-01 and use ESPnow protocol
If you want higher-frequency data, you need a different sensor. The link below is an article from Analog Devices on choosing a MEMS vibration sensor. There is a chart that shows their highest-bandwidth sensors are in the 25 kHz range. If you google "high-frequency MEMS vibration sensor", you will find many links and articles.
https://www.analog.com/en/technical-articles/best-mems-sensor-for-wireless-cbm-system-part-2.html
If you want higher-frequency data, you need a different sensor. The link below is an article from Analog Devices on choosing a MEMS vibration sensor. There is a chart that shows their highest-bandwidth sensors are in the 25 kHz range. If you google "high-frequency MEMS vibration sensor", you will find many links and articles.
https://www.analog.com/en/technical-articles/best-mems-sensor-for-wireless-cbm-system-part-2.html
Okay thanks, do you have an idea of the maximum possible ksps we can achieve
joepasquariello
Well-known member
Okay thanks, do you have an idea of the maximum possible ksps we can achieve
The highest rate I saw for an ADXL device was 25 kHz, but I saw many articles on "high frequency" and "high bandwidth" MEMS accelerometers, so there may be faster ones out there, though they may be very specialized. I saw lots of articles on CBM (condition-based monitoring) via MEMS devices. Do some googling and reading. If you can find an SPI device with higher bandwidth, it will likely have a high maximum SPI clock rate, but T4.1 is extremely fast, so there is a good chance it will be able to achieve the required SPI clock frequency.