3.4 A 14b 98Hz-to-5.9kHz 1.7-to-50.8 μ W BW/Power Scalable Sensor Interface with a Dynamic Bandgap Reference and an Untrimmed Gain Error of ± 0.26 % from −40°C to 125°C

Tang, Zhong; Liu, Yuyan; Chen, Pengpeng; Wang, Haining; Yu, Xiaopeng; Makinwa, Kofi A. A.; Tan, Nick Nianxiong

doi:10.1109/isscc49657.2024.10454378

2024 IEEE International Solid-State Circuits Conference (ISSCC) 2024

DOI: 10.1109/isscc49657.2024.10454378

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3.4 A 14b 98Hz-to-5.9kHz 1.7-to-50.8 μ W BW/Power Scalable Sensor Interface with a Dynamic Bandgap Reference and an Untrimmed Gain Error of ± 0.26 % from −40°C to 125°C

Zhong Tang,

Yuyan Liu,

Pengpeng Chen

et al.

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A 10.7‐μ$$ \upmu $$A 103‐dB DR Hybrid Delta‐Sigma Modulator for Sensing Applications

Zhang,

Wu,

Tang

et al. 2024

Circuit Theory & Apps

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This paper reports a low‐power, high dynamic range second‐order delta‐sigma modulator (DSM) for sensing applications. The DSM employs a hybrid CIFF‐B topology, consisting of a continuous‐time first stage and a discrete‐time second stage. The first stage is an OTA‐based RC integrator with inherent anti‐aliasing properties, while the second stage is a switched‐capacitor integrator. Offset and noise in the first stage are mitigated by the chopper‐stabilization technique, while those in the second stage are suppressed through the gain provided by the first stage. Furthermore, the OTA‐sharing technology is utilized in the second stage to realize signal addition before quantization, reducing design complexity. The hybrid DSM prototype is fabricated with a 180‐nm CMOS process and occupies an area of 0.123 mm2. Measurement results show peak SNDR/SNR/SFDR values of 95.8, 97.1, and 102.8 dB, respectively, with a current consumption of 10.7 A from a 1.8‐V single supply. The reported DSM achieves a 103‐dB dynamic range in a 100‐Hz signal bandwidth, corresponding to a Schreier figure‐of‐merit (FoMs) value of 170.2 dB.

show abstract

A 10.7‐μ$$ \upmu $$A 103‐dB DR Hybrid Delta‐Sigma Modulator for Sensing Applications

Zhang,

Wu,

Tang

et al. 2024

Circuit Theory & Apps

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

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3.4 A 14b 98Hz-to-5.9kHz 1.7-to-50.8 μ W BW/Power Scalable Sensor Interface with a Dynamic Bandgap Reference and an Untrimmed Gain Error of ± 0.26 % from −40°C to 125°C

Cited by 1 publication

References 6 publications

A 10.7‐μ$$ \upmu $$A 103‐dB DR Hybrid Delta‐Sigma Modulator for Sensing Applications

A 10.7‐μ$$ \upmu $$A 103‐dB DR Hybrid Delta‐Sigma Modulator for Sensing Applications

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