High accuracy dual output voltage reference circuit for differential 10-bit successive approximation register analog to digital converter using 180nm technology

High accuracy dual output voltage reference circuit for differential 10-bit successive approximation register analog to digital converter using 180nm technology

Voltage reference circuit produces reference voltage that is independent of fabrication process, temperature and supply voltage (PVT) variation. Differential successive approximation register (SAR) analog to digital converter (ADC) that converts an analog signal to digital signal is very much dep...

Full description

Saved in:
Bibliographic Details
Main Author: Yusuf, Siti Idzura
Format: Thesis
Language:English
Published: 2020
Subjects:
Voltage references
Analog-to-digital converters
Successive approximation analog-to-digital converters
Online Access:http://psasir.upm.edu.my/id/eprint/97820/1/FK%202020%2096%20-%20IR.1.pdf
Tags: Add Tag
No Tags, Be the first to tag this record!
id my-upm-ir.97820
record_format uketd_dc
spelling my-upm-ir.978202022-11-03T04:46:10Z High accuracy dual output voltage reference circuit for differential 10-bit successive approximation register analog to digital converter using 180nm technology 2020-05 Yusuf, Siti Idzura Voltage reference circuit produces reference voltage that is independent of fabrication process, temperature and supply voltage (PVT) variation. Differential successive approximation register (SAR) analog to digital converter (ADC) that converts an analog signal to digital signal is very much dependent on accurate reference voltage which defines the resolution of the converter. It requires two reference voltages namely VREF and VCM. VREF is used to set the full-scale voltage range while the common-mode voltage, VCM defines an initial value of most significant bit (MSB) digital output. VCM is designed as such that it is half of VREF and independent of process, voltage and temperature (PVT) variations. The deviation of the VCM develops an offset that shifts the transfer function of the ADC. Consequently, it reduces the dynamic range of the analog input to be digitised. The evolution of technology has favoured in a system on chip integration of the voltage reference and SAR ADC because it reduces design circuit area and consumes less power. However, based on the previous literatures, the impact of voltage reference circuits integrated with SAR ADC on a single die has not been discussed in depth. Hence, this thesis features the design and implementation of a high accuracy dynamic dual output voltage reference circuit for a 200kS/s differential 10-bit SAR ADC using a Silterra 0.18μm process with a supply voltage of 1.8V on a common die. The measurement of the fabricated chips is able to generate constant reference voltages for the VREF is that 1.2V±0.03V. Meanwhile, the VCM deviates as much as ±4mV between temperatures ranging from 0 C and 80 C across ±10% voltage supply variation. The measurement result shows that the circuit have sufficient drive capability to provide dual reference voltages to the SAR ADC. The voltage reference circuit achieves a good performance on the SAR ADC with 0.4LSB differential nonlinearity (DNL), 57.39dB Signal-to-noise and distortion ratio (SINAD) and an effective number of bits (ENOB) of 9.5 bits. The voltage reference circuit functions accurately in temperature sensor application between 0 C and 80 C temperature input range. Voltage references Analog-to-digital converters Successive approximation analog-to-digital converters 2020-05 Thesis http://psasir.upm.edu.my/id/eprint/97820/ http://psasir.upm.edu.my/id/eprint/97820/1/FK%202020%2096%20-%20IR.1.pdf text en public doctoral Universiti Putra Malaysia Voltage references Analog-to-digital converters Successive approximation analog-to-digital converters Shafie, Suhaidi
institution Universiti Putra Malaysia
collection PSAS Institutional Repository
language English
advisor Shafie, Suhaidi
topic Voltage references
Analog-to-digital converters
Successive approximation analog-to-digital converters
spellingShingle Voltage references
Analog-to-digital converters
Successive approximation analog-to-digital converters
Yusuf, Siti Idzura
High accuracy dual output voltage reference circuit for differential 10-bit successive approximation register analog to digital converter using 180nm technology
description Voltage reference circuit produces reference voltage that is independent of fabrication process, temperature and supply voltage (PVT) variation. Differential successive approximation register (SAR) analog to digital converter (ADC) that converts an analog signal to digital signal is very much dependent on accurate reference voltage which defines the resolution of the converter. It requires two reference voltages namely VREF and VCM. VREF is used to set the full-scale voltage range while the common-mode voltage, VCM defines an initial value of most significant bit (MSB) digital output. VCM is designed as such that it is half of VREF and independent of process, voltage and temperature (PVT) variations. The deviation of the VCM develops an offset that shifts the transfer function of the ADC. Consequently, it reduces the dynamic range of the analog input to be digitised. The evolution of technology has favoured in a system on chip integration of the voltage reference and SAR ADC because it reduces design circuit area and consumes less power. However, based on the previous literatures, the impact of voltage reference circuits integrated with SAR ADC on a single die has not been discussed in depth. Hence, this thesis features the design and implementation of a high accuracy dynamic dual output voltage reference circuit for a 200kS/s differential 10-bit SAR ADC using a Silterra 0.18μm process with a supply voltage of 1.8V on a common die. The measurement of the fabricated chips is able to generate constant reference voltages for the VREF is that 1.2V±0.03V. Meanwhile, the VCM deviates as much as ±4mV between temperatures ranging from 0 C and 80 C across ±10% voltage supply variation. The measurement result shows that the circuit have sufficient drive capability to provide dual reference voltages to the SAR ADC. The voltage reference circuit achieves a good performance on the SAR ADC with 0.4LSB differential nonlinearity (DNL), 57.39dB Signal-to-noise and distortion ratio (SINAD) and an effective number of bits (ENOB) of 9.5 bits. The voltage reference circuit functions accurately in temperature sensor application between 0 C and 80 C temperature input range.
format Thesis
qualification_level Doctorate
author Yusuf, Siti Idzura
author_facet Yusuf, Siti Idzura
author_sort Yusuf, Siti Idzura
title High accuracy dual output voltage reference circuit for differential 10-bit successive approximation register analog to digital converter using 180nm technology
title_short High accuracy dual output voltage reference circuit for differential 10-bit successive approximation register analog to digital converter using 180nm technology
title_full High accuracy dual output voltage reference circuit for differential 10-bit successive approximation register analog to digital converter using 180nm technology
title_fullStr High accuracy dual output voltage reference circuit for differential 10-bit successive approximation register analog to digital converter using 180nm technology
title_full_unstemmed High accuracy dual output voltage reference circuit for differential 10-bit successive approximation register analog to digital converter using 180nm technology
title_sort high accuracy dual output voltage reference circuit for differential 10-bit successive approximation register analog to digital converter using 180nm technology
granting_institution Universiti Putra Malaysia
publishDate 2020
url http://psasir.upm.edu.my/id/eprint/97820/1/FK%202020%2096%20-%20IR.1.pdf
_version_ 1776100275371638784

Similar Items