This paper presents the sensitivity analysis of an extended-range, second-order Incremental ADC (IADC) to the non-idealities of the operational amplifiers (op-amps) used. Different configurations of the extended-range IADCs are compared in terms of required ENOB and op-amp specifications. In all the configurations, a flash ADC with varying resolution is used as extended-range ADC. The ADC clock frequency is considered in all cases equal to 80 MHz. From the analysis it turns out that, in order to achieve a given ENOB, the extended-range IADC requires a significantly lower number of clock cycles than a conventional IADC, but the requirements of the op-amps are much more stringent.
Taralkar, A., Conzatti, F., Malcovati, P., Baschirotto, A. (2020). Analysis of operational amplifier requirements for extended-range second-order incremental ADCs. In ICECS 2020 - 27th IEEE International Conference on Electronics, Circuits and Systems, Proceedings (pp.1-4). Institute of Electrical and Electronics Engineers Inc. [10.1109/ICECS49266.2020.9294870].
Analysis of operational amplifier requirements for extended-range second-order incremental ADCs
Malcovati P.;Baschirotto A.
2020
Abstract
This paper presents the sensitivity analysis of an extended-range, second-order Incremental ADC (IADC) to the non-idealities of the operational amplifiers (op-amps) used. Different configurations of the extended-range IADCs are compared in terms of required ENOB and op-amp specifications. In all the configurations, a flash ADC with varying resolution is used as extended-range ADC. The ADC clock frequency is considered in all cases equal to 80 MHz. From the analysis it turns out that, in order to achieve a given ENOB, the extended-range IADC requires a significantly lower number of clock cycles than a conventional IADC, but the requirements of the op-amps are much more stringent.
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