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ADS1014 Data Format

Emna Amri
Prodigy 80 points
Other Parts Discussed in Thread: ADS1014

Hello,

the ADS1014 is a 12 bits ADC so I don't understand how it can give output code up to 7FF0h or 8000h. According to my knowledge the maximum code value given by a 12bits ADC is 2^11= 2048.

Thanks in advance for the answer.

Best regards,

Emna.

  • 0
    TI__Guru* 97775 points
    Emna,


    The datasheet is worded awkwardly. Output data is zero-padded on the least significant four bits. Start by removing the last nibble. For 7FF0, this becomes 7FF. For 8000, this becomes 800.

    After that the largest value from the converter becomes 7FF or (2^11)-1 or 2047, and the most negative value becomes 800 or -(2^11) or -2048 in two's complement notation.


    Joseph Wu