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ADS1198: ADS1198

Part Number: ADS1198


Sir

I am doing a project on ADS1198. I have inputed ADS with ECG simulator and I got 19 byte data stream as output(C0,00,03,00,00,00,B6,E8,8B,84,42,00,4A,6C,03,20,1B,CC,07).I am stuck with an issue related with plotting of outputted data. In the data sheet it is mentioned that output is in the 2's complement format with MSB 1st.The first 3 bytes are header and status bits,after that the channel data start.My issue is Should I need to  convert each channel data  to normal form by negating and adding one(~a+1).Since I am not that much strong in digital, it would be very helpful if anybody could help me to solve this out.

  • Hello Elizabeth,

    Yes, each channel will have to be interpreted individually. The data word will need to be broken up into its 16 bit parts and evaluated to see if it is negative. If so, then you will need to somehow convert it to a usable value in your processor.

    Brian