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Implementation of SAR ADC for Biomedical Applications—A Review

  • Lavita MendoncaEmail author
  • Rekha Bhandarkar
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 614)

Abstract

In recent technology innovations, SAR ADC is a type of architecture commonly used in biomedical applications. The key advantage of SAR ADC is possibility to avoid energy-consuming operational amplifier (OPAMP), less-power consumption features. Along with these advantages of SAR ADC architecture also has challenges to achieve better sampling rate in order to balance speed for satisfactory sampling rate at low power. SAR ADC used for accuracy generally contains satisfactory speed for converting signal which is original in analog form in the area of biomedical application. ADC uses effective part of output fed back to input as feedback. Approximation of signal samples of analog form of signal to digital form is driven by feedback. In the SAR ADC, accuracy is a function precision of matching component used in capacitive array, capability to withstand small changes in signal between corresponding signals at input and output of capacitive array. The measure of speed is a function of DAC and comparators block settling time. In addition to speed, output representation which is the number of bits is responsible for deciding the size of SAR ADC.

Keywords

Analog-to-digital converter (ADC) Successive approximation register (SAR) Comparator DAC array Low power Digital control logic Biomedical application 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  1. 1.Department of ECENMAM Institute of TechnologyKarkalaIndia

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