A digital calibration method is presented to reduce SAR ADC offset mismatch. By reusing charge injection (CI) cells, the offset in the sense amplifier (SA) is reduced to less than… Click to show full abstract
A digital calibration method is presented to reduce SAR ADC offset mismatch. By reusing charge injection (CI) cells, the offset in the sense amplifier (SA) is reduced to less than 1 LSB. In addition, four auxiliary CI cells are incorporated in the digital‐to‐analogue converter to further reduce the SA offset below 1/2 LSB. Measurement results from a 180 nm CMOS test chip validate the effectiveness of the proposed method. The offset is reduced to 0.5 mV measured at a common‐mode voltage of 1.5 V with a 1.8 V power supply.
Keywords:
charge injection;
reusing charge;
injection cells;
sar adc;
adc offset
Journal Title: Electronics Letters
Year Published: 2025
Link to full text (if available)
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Journal Title: Electronics Letters
Year Published: 2025
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!