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This work proposed a binary-weighted Digital-to-Analog Converter (DAC), which is designed to be used in Asynchronous successive approximation register (SAR) based Analog-todigital converters (ADCs) specifically and in other relevant operations .The design has yielded an improved slew rate, and it is less prone to noise as the size of capacitors is taken in accordance with KT/C noise calculation. For achieving all mentioned goals, and to restrict the size of DAC, within suitable dimensions charge scaling DACs are used. One more advantage of this design is its accuracy, further it does not require op-Amps for its operation. Results of statistical simulation and mathematical consideration are published which depicts the supremacy of the design. A highresolution DAC designed for this specific purpose has to have special consideration for the effect of local mismatch, parasitic and matching of the capacitors, for that, the common-centroid approach has been followed. This design has displayed a high resolution with small unit capacitances and that too without expensive factory calibration.

Design of binary weighted DAC for asynchronous ADC with improved slew rate and with calibrated size of capacitors