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A 0.6V and 0.53µW nonius TDC for a passive UHF RFID pressure sensor tag

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5 Author(s)
A. Jimenez-Irastorza ; CEIT & TECNUN, Univ. of Navarra, San Sebastián, Spain ; A. Beriain ; J. F. Sevillano ; I. Rebollo
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This work presents a full passive UHF RFID pressure sensor tag which uses a nonius based TDC capacitive sensor interface. The proposed converter has a fully digital output and allows reducing power consumption while maintaining the required resolution. The nonius based TDC has been designed using TSMC 90nm standard CMOS technology. Post-layout simulations show that the converter presents a 12 bit resolution and 9 effective bits in the time range from 10μs to 40μs when VDD varies in the range from 0.55V to 0.7V and temperature variations in the range from 0°C to 60°C are considered. The maximum measurement time is 49.9μs and the average power consumption of the converter is 0.53μW at 10 samples per second from a 0.6V voltage supply.

Published in:

RFID-Technologies and Applications (RFID-TA), 2012 IEEE International Conference on

Date of Conference:

5-7 Nov. 2012