A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNR

A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNR

This paper presents a second-order discrete-time Sigma-Delta (SD) Analog-to-Digital Converter (ADC) with over 80 dB Signal to Noise Ratio (SNR), which is applied in a signal conditioning IC for automotive piezo-resistive pressure sensors. To reduce the flicker noise of the structure, choppers are us...

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Main Authors: Behnam Samadpoor Rikan, Sang-Yun Kim, Nabeel Ahmad, Hamed Abbasizadeh, Muhammad Riaz Ur Rehman, Khuram Shehzad, Arash Hejazi, Reza E. Rad, Deeksha Verma, Kang-Yoon Lee
Format: Article
Language:English
Published: MDPI AG 2018-11-01
Series:Sensors
Subjects:
Sigma-Delta ADC
flicker noise
pressure sensor
chopper
decimation filter
Online Access:https://www.mdpi.com/1424-8220/18/12/4199
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spelling doaj-84d372128e924b4098a68da40c7888862020-11-24T21:28:33ZengMDPI AGSensors1424-82202018-11-011812419910.3390/s18124199s18124199A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNRBehnam Samadpoor Rikan0Sang-Yun Kim1Nabeel Ahmad2Hamed Abbasizadeh3Muhammad Riaz Ur Rehman4Khuram Shehzad5Arash Hejazi6Reza E. Rad7Deeksha Verma8Kang-Yoon Lee9Nanoelectronics Group, Department of Informatics, University of Oslo, 0316 Oslo, NorwayCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, KoreaCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, KoreaCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, KoreaCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, KoreaCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, KoreaCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, KoreaCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, KoreaCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, KoreaCollege of Information and Communication Engineering, Sungkyunkwan University, Suwon 16419, KoreaThis paper presents a second-order discrete-time Sigma-Delta (SD) Analog-to-Digital Converter (ADC) with over 80 dB Signal to Noise Ratio (SNR), which is applied in a signal conditioning IC for automotive piezo-resistive pressure sensors. To reduce the flicker noise of the structure, choppers are used in every stage of the high gain amplifiers. Besides, to reduce the required area and power, only the CIC filter structure is adopted as a decimation filter. This filter has a configurable structure that can be applied to different data rates and input signal bandwidths. The proposed ADC was fabricated and measured in a 0.18-&#181;m CMOS process. Due to the application of only a CIC filter, the total active area of the SD-ADC and reference generator is 0.49 mm<sup>2</sup> where the area of the decimation filter is only 0.075 mm<sup>2</sup>. For the input signal bandwidth of 1.22 kHz, it achieved over 80 dB SNR in a 2.5 MHz sampling frequency while consuming 646 &#181;W power.https://www.mdpi.com/1424-8220/18/12/4199Sigma-Delta ADCflicker noisepressure sensorchopperdecimation filter
collection DOAJ
language English
format Article
sources DOAJ
author Behnam Samadpoor Rikan
Sang-Yun Kim
Nabeel Ahmad
Hamed Abbasizadeh
Muhammad Riaz Ur Rehman
Khuram Shehzad
Arash Hejazi
Reza E. Rad
Deeksha Verma
Kang-Yoon Lee
spellingShingle Behnam Samadpoor Rikan
Sang-Yun Kim
Nabeel Ahmad
Hamed Abbasizadeh
Muhammad Riaz Ur Rehman
Khuram Shehzad
Arash Hejazi
Reza E. Rad
Deeksha Verma
Kang-Yoon Lee
A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNR
Sensors
Sigma-Delta ADC
flicker noise
pressure sensor
chopper
decimation filter
author_facet Behnam Samadpoor Rikan
Sang-Yun Kim
Nabeel Ahmad
Hamed Abbasizadeh
Muhammad Riaz Ur Rehman
Khuram Shehzad
Arash Hejazi
Reza E. Rad
Deeksha Verma
Kang-Yoon Lee
author_sort Behnam Samadpoor Rikan
title A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNR
title_short A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNR
title_full A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNR
title_fullStr A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNR
title_full_unstemmed A Sigma-Delta ADC for Signal Conditioning IC of Automotive Piezo-Resistive Pressure Sensors with over 80 dB SNR
title_sort sigma-delta adc for signal conditioning ic of automotive piezo-resistive pressure sensors with over 80 db snr
publisher MDPI AG
series Sensors
issn 1424-8220
publishDate 2018-11-01
description This paper presents a second-order discrete-time Sigma-Delta (SD) Analog-to-Digital Converter (ADC) with over 80 dB Signal to Noise Ratio (SNR), which is applied in a signal conditioning IC for automotive piezo-resistive pressure sensors. To reduce the flicker noise of the structure, choppers are used in every stage of the high gain amplifiers. Besides, to reduce the required area and power, only the CIC filter structure is adopted as a decimation filter. This filter has a configurable structure that can be applied to different data rates and input signal bandwidths. The proposed ADC was fabricated and measured in a 0.18-&#181;m CMOS process. Due to the application of only a CIC filter, the total active area of the SD-ADC and reference generator is 0.49 mm<sup>2</sup> where the area of the decimation filter is only 0.075 mm<sup>2</sup>. For the input signal bandwidth of 1.22 kHz, it achieved over 80 dB SNR in a 2.5 MHz sampling frequency while consuming 646 &#181;W power.
topic Sigma-Delta ADC
flicker noise
pressure sensor
chopper
decimation filter
url https://www.mdpi.com/1424-8220/18/12/4199
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