Ultra-low power incremental delta-sigma ADC for energy harvesting sensor applications

Jarno Salomaa*, Shiva Jamali-Zavareh, Mika Pulkkinen, Shailesh Singh Chouhan, Kari Halonen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

This paper presents an ultra-low power incremental (Formula presented.) ADC with flexible sampling frequency, accuracy, and operational duty-cycle. The flexibility and low leakage power enable efficient scaling of average power together with performance. This allows simultaneous optimization of the sensor system (1) for various multiplexed, both on-chip and off-chip sensor interfaces, and (2) for a wide range of available harvested energy. The architecture allows further flexibility as it can be used in regular continuous (Formula presented.) mode as well, without trading off accuracy. The ADC was implemented in a 180 nm CMOS process, on the same ASIC with a temperature sensor, pressure sensor and energy harvesting functionalities. The ADC has a nominal power consumption of (Formula presented.)W, SNDR of 68 dB and BW of 200 Hz, denoting a (Formula presented.) pJ/conv.

Original languageEnglish
Pages (from-to)369-382
Number of pages14
JournalAnalog Integrated Circuits and Signal Processing
Volume92
Issue number3
Early online date29 Jun 2017
DOIs
Publication statusPublished - Sep 2017
MoE publication typeA1 Journal article-refereed

Keywords

  • Analog-to-digital
  • Energy harvesting
  • Incremental delta-sigma
  • Sensor
  • Ultra-low power

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