Does anyone have an idea, how I can "capture" the maximum voltage of a Gforce sensor between 2 samples of a low speed, low power AD convertor?
John van Zijl
Since this seems like more of a question about sensors rather than data converters, if you would like support from ADI on this, I suggest contacting the support contact in your region at http://www.analog.com/support. We don't currently have a support community for our MEMS and Sensor products on EngineerZone.
EngineerZone Community Manager
No, The sensor delivers a voltage, what I need is something like a maximum sample and hold.
I sample every second, if the package drops half a second later I need to detect that peak value. Normaly I would sample with 10kHz than I would catch the peak, but that would take massive amounds of energy and I need a mobile solution. So the basic Idea is to make a analog solution that catches the peak of the event and when the cpu wakes up, it stores the highest value of the last second.
thanks for the reply
take a look at ADXL345. This part has an internal FIFO that stores the last 32 values (above a programmed threshold). You can wake up your CPU using an interrupt generated by this FIFO.
For those reading this thread, we now have a MEMS Inertial Sensors Community where these type of questions are discussed.
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