Novel Advances in Microsystems Technologies and Their Applications

22	ADC Basics and Design Techniques for a Low-Power ADC for Biomedical Applications Seung-Tak Ryu

CONTENTS

22.1    Introduction

22.2    Overview of ADC Basics

22.2.1    ADC Block Diagram and Signals

22.2.2    Sampling

22.2.3    Quantization

22.3    Nonidealities

22.3.1    Noise

22.3.1.1    Noise by Quantization

22.3.1.2    Noise from Sampling (kT/C Noise)

22.3.1.3    Noise by Sampling Jitter

22.3.2    Nonlinearity

22.3.2.1    Circuit Nonlinearity

22.3.2.2    Device Mismatch: Decision Threshold Shift (Global and Local)

22.3.2.3    Settling Error

22.3.3    Performance Metrics

22.3.3.1    Static Linearity: DNL and INL

22.3.3.2    Dynamic Performance: SNR, SFDR, SNDR, ENOB and DR

22.3.3.3    Figure of Merit

22.4    Low-Power ADCs for Biomedical ...