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ADS8341: Precision DAQ system for LIS344ALH accelerometer

David Fosca
Intellectual 450 points
Part Number: ADS8341
Other Parts Discussed in Thread: ADS8684A, ADS8168, ADS8684

Hello,

I am new with working with DAQ systems, I am currently working with the LIS344ALH accelerometer which has a resolution of 50 (ug/Hz-1/2) and a dynamic range of +-2g with enough bandwidth of 50 Hz. The ADC is 16 bit so it is close to the accelerometer resolution.

I would like to know how can I try the ADS8341 with the LIS344ALH in a evaluation board that has a LP filter and gain amplifiers. And if it is possible, a cheap one.

Thanks a lot,

David.

  • 0
    TI__Expert 5485 points
    Hi David

    ADS8341, unfortunately does not have any evaluation board. The only way to test this device is to make a small proto board with ADC or hardwire ADC to the sensor board EVM.

    There are couple of other options of 16 bit, 4CH parts which have EVM available for their higher channel variant (8 channel)

    1. ADS8684A: 16 bit, 4 channel with integrated PGA and low pass filter
    2. ADS8168: 16 bit, 8 channel, 1MSPS ADC with integrated REF/REF buffer

    Let me know if you need any other information

    Thanks & Regards
    Abhijeet
  • 0 in reply to Abhijeet Godbole
    Intellectual 450 points

    Hi Abhijeet,

    Thanks for the quick reply.

    I need a 16 or more bits ADC for my accelerometer app. I am using a LIS344ALH analog accelerometer that has noise density of 50 ugHz-1/2, so I need quite good resolution from the ADC too. Also, I need to filter the signal at 50 Hz before amplifying it so it gets to the ADC without noise input above 50 Hz. The evaluation boards are quite pricey for me, is there any know design I can follow to use the accelerometer with the ADC and connect it to the MSP430 MCU that I am also buying?

    Is there any quick way of designing that kind of DAQ circuit?

    Please, I am new to DAQ circuits design , all the help will be highly appreciated.

    Thanks,

    David.

  • 0 in reply to David Fosca
    TI__Expert 5485 points

    Hi David

    Sorry for the delay in the reply !

    The best possible option I can think of is to have an external filter followed by 16 bit device similar to ADS8684. The quickest possible way to design this to have an EVM and interface with your sensor board or create your own proto board with ADC.

    Thanks & Regards

    Abhijeet