Low-power and accurate operation of a CMOS smart temperature sensor based on bipolar devices and Delta-Sigma A/D converter

AL Aita, KAA Makinwa

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific


Due to the trend towards low power operation, as in autonomous systems where power constraints are very high, sensors are increasingly being required to dissipate very low power (few microwatts). In this paper, a low-power version of a smart temperature sensor in 0.7 {it¿m} CMOS technology is presented. Based on accuracy requirements, a minimum biasing current {itIbias} for the sensor¿s bipolar core is determined. Measurement results for {itI{bias}} = 250{itnA} and CS = 1.25{itpF} (ADC sampling capacitor) are shown. An inaccuracy below ±0.15°C from ¿55°C to 125°C is achievable with a two-point calibration.
Original languageUndefined/Unknown
Title of host publicationProceedings Microelectronics and Electronics Conference, 2007
Editors s.n.
Place of PublicationBordeaux, France.
PublisherIEEE Society
Number of pages4
ISBN (Print)1-4244-1000-2
Publication statusPublished - 2007
EventMicroelectronics and Electronics Conference, 2007, Santa Maria, Brazil - Bordeaux, France.
Duration: 2 Jul 20075 Jul 2007

Publication series



ConferenceMicroelectronics and Electronics Conference, 2007, Santa Maria, Brazil


  • Elektrotechniek
  • Techniek
  • conference contrib. refereed
  • Conf.proc. > 3 pag

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