Work

Analysis and Calibration of Nonbinary-Weighted Capacitive DAC for High-Resolution SAR ADCs

Year: 2014

Type: article

Abstract: This brief analyzes the effect of capacitor variation on the design of high-resolution nonbinary-weighted successive-approximation-register analog-to-digital converters in terms of radix, conversion steps, and accuracy. Moreover, the limitation caused by the one-side redundancy of the nonbinary-weighted network is addressed and a corresponding solution with a mathematical derivation is provided. In order to relax the mismatch requirement on the capacitor sizing while still ensuring enough linearity, a bottom-up weight calibration technique accounting for noise and offset errors is proposed, and its effectiveness is demonstrated. This calibration approach can be easily incorporated into a charge-redistribution converter without modifying its main architecture and conversion sequence.

Source: IEEE Transactions on Circuits & Systems II Express Briefs

DOI: 10.1109/tcsii.2014.2331111

Authors: Dai Zhang, Atila Alvandpour

Institution: Linköping University

Language: English

Topic: Analog and Mixed-Signal Circuit Design

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funder: Linköpings Universitet

OpenAlex ID: W2136376206

FWCI: 1.622

Cites: 12

Cited by: 35

Related to: 10