Analysis and design considerations of systematic nonlinearity for sigma-delta current-steering DAC

Astria Nur Irfansyah; Torsten Lehmann; Julian Jenkins; Tara Julia Hamilton

doi:10.1109/TENCONSpring.2013.6584427

Analysis and design considerations of systematic nonlinearity for sigma-delta current-steering DAC

Astria Nur Irfansyah, Torsten Lehmann, Julian Jenkins, Tara Julia Hamilton

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

6 Citations (Scopus)

Abstract

This paper deals with the design aspect of current-steering D/A converters which is to be incorporated in an oversampling sigma-delta DAC with Dynamic Element Matching (DEM), and particularly with the trade-off between device sizing, output impedance, and ideal systematic non-linearity. A formula for the estimation of minimum output impedance requirement based on DNL specification is proposed, and the corresponding design guideline is given. As a case study, a 16-bit sigma-delta current-steering DAC is presented. It is shown in this paper that basic cascode current mirror structure is not practical for this purpose. An 8-level current steering DAC with 16-bit accuracy was designed in a 0.18-μm CMOS process using the regulated cascode enhanced output impedance current mirror. A worst case INL of 0.09 LSB of a 16-bit converter was achieved.

Original language	English
Title of host publication	IEEE 2013 Tencon - Spring, TENCONSpring 2013 - Conference Proceedings
Pages	108-111
Number of pages	4
DOIs	https://doi.org/10.1109/TENCONSpring.2013.6584427
Publication status	Published - 2013
Externally published	Yes
Event	2013 1st IEEE TENCON Spring Conference, TENCONSpring 2013 - Sydney, NSW, Australia Duration: 17 Apr 2013 → 19 Apr 2013

Publication series

Name	IEEE 2013 Tencon - Spring, TENCONSpring 2013 - Conference Proceedings

Conference

Conference	2013 1st IEEE TENCON Spring Conference, TENCONSpring 2013
Country/Territory	Australia
City	Sydney, NSW
Period	17/04/13 → 19/04/13

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10.1109/TENCONSpring.2013.6584427

Cite this

Irfansyah, A. N., Lehmann, T., Jenkins, J., & Hamilton, T. J. (2013). Analysis and design considerations of systematic nonlinearity for sigma-delta current-steering DAC. In IEEE 2013 Tencon - Spring, TENCONSpring 2013 - Conference Proceedings (pp. 108-111). Article 6584427 (IEEE 2013 Tencon - Spring, TENCONSpring 2013 - Conference Proceedings). https://doi.org/10.1109/TENCONSpring.2013.6584427

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title = "Analysis and design considerations of systematic nonlinearity for sigma-delta current-steering DAC",

abstract = "This paper deals with the design aspect of current-steering D/A converters which is to be incorporated in an oversampling sigma-delta DAC with Dynamic Element Matching (DEM), and particularly with the trade-off between device sizing, output impedance, and ideal systematic non-linearity. A formula for the estimation of minimum output impedance requirement based on DNL specification is proposed, and the corresponding design guideline is given. As a case study, a 16-bit sigma-delta current-steering DAC is presented. It is shown in this paper that basic cascode current mirror structure is not practical for this purpose. An 8-level current steering DAC with 16-bit accuracy was designed in a 0.18-μm CMOS process using the regulated cascode enhanced output impedance current mirror. A worst case INL of 0.09 LSB of a 16-bit converter was achieved.",

author = "Irfansyah, {Astria Nur} and Torsten Lehmann and Julian Jenkins and Hamilton, {Tara Julia}",

year = "2013",

doi = "10.1109/TENCONSpring.2013.6584427",

language = "English",

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series = "IEEE 2013 Tencon - Spring, TENCONSpring 2013 - Conference Proceedings",

pages = "108--111",

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note = "2013 1st IEEE TENCON Spring Conference, TENCONSpring 2013 ; Conference date: 17-04-2013 Through 19-04-2013",

}

Irfansyah, AN, Lehmann, T, Jenkins, J & Hamilton, TJ 2013, Analysis and design considerations of systematic nonlinearity for sigma-delta current-steering DAC. in IEEE 2013 Tencon - Spring, TENCONSpring 2013 - Conference Proceedings., 6584427, IEEE 2013 Tencon - Spring, TENCONSpring 2013 - Conference Proceedings, pp. 108-111, 2013 1st IEEE TENCON Spring Conference, TENCONSpring 2013, Sydney, NSW, Australia, 17/04/13. https://doi.org/10.1109/TENCONSpring.2013.6584427

Analysis and design considerations of systematic nonlinearity for sigma-delta current-steering DAC. / Irfansyah, Astria Nur; Lehmann, Torsten; Jenkins, Julian et al.
IEEE 2013 Tencon - Spring, TENCONSpring 2013 - Conference Proceedings. 2013. p. 108-111 6584427 (IEEE 2013 Tencon - Spring, TENCONSpring 2013 - Conference Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Analysis and design considerations of systematic nonlinearity for sigma-delta current-steering DAC

AU - Irfansyah, Astria Nur

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AU - Jenkins, Julian

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N2 - This paper deals with the design aspect of current-steering D/A converters which is to be incorporated in an oversampling sigma-delta DAC with Dynamic Element Matching (DEM), and particularly with the trade-off between device sizing, output impedance, and ideal systematic non-linearity. A formula for the estimation of minimum output impedance requirement based on DNL specification is proposed, and the corresponding design guideline is given. As a case study, a 16-bit sigma-delta current-steering DAC is presented. It is shown in this paper that basic cascode current mirror structure is not practical for this purpose. An 8-level current steering DAC with 16-bit accuracy was designed in a 0.18-μm CMOS process using the regulated cascode enhanced output impedance current mirror. A worst case INL of 0.09 LSB of a 16-bit converter was achieved.

AB - This paper deals with the design aspect of current-steering D/A converters which is to be incorporated in an oversampling sigma-delta DAC with Dynamic Element Matching (DEM), and particularly with the trade-off between device sizing, output impedance, and ideal systematic non-linearity. A formula for the estimation of minimum output impedance requirement based on DNL specification is proposed, and the corresponding design guideline is given. As a case study, a 16-bit sigma-delta current-steering DAC is presented. It is shown in this paper that basic cascode current mirror structure is not practical for this purpose. An 8-level current steering DAC with 16-bit accuracy was designed in a 0.18-μm CMOS process using the regulated cascode enhanced output impedance current mirror. A worst case INL of 0.09 LSB of a 16-bit converter was achieved.

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Analysis and design considerations of systematic nonlinearity for sigma-delta current-steering DAC

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