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15.4b incremental sigma-delta capacitance-to-digital converter with zoom-in 9b asynchronous SAR | IEEE Conference Publication | IEEE Xplore

15.4b incremental sigma-delta capacitance-to-digital converter with zoom-in 9b asynchronous SAR


Abstract:

An incremental zoom-in capacitance-to-digital converter (CDC) is proposed. By using a 9b SAR, the OSR can be reduced to only 32, significantly improving conversion energy...Show More

Abstract:

An incremental zoom-in capacitance-to-digital converter (CDC) is proposed. By using a 9b SAR, the OSR can be reduced to only 32, significantly improving conversion energy. We show how the OTA in the SAR is bypassed for the CDC further reducing energy and propose a novel matrix based 512-element unit-cap structure for dynamic element matching. The CDC achieves 94.7dB SNR and 33.7µW power consumption with 175fJ/conv-step at 1.4V supply.
Date of Conference: 10-13 June 2014
Date Added to IEEE Xplore: 21 July 2014
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Conference Location: Honolulu, HI, USA

References

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