[K-9] Advanced Device-based Circuits and Power Management Systems

[K-9-03] A Sub-10nW Temperature-to-Digital-Converter for Thermopile Temperature Sensors

Mao-Wei Lee¹, 〇Hongchin Lin¹, Po-Wei Lai¹ (1. National Chung Hsing Univ. (Taiwan))

Presentation style: Online

https://doi.org/10.7567/SSDM.2022.K-9-03

A 6.29nW temperature-to-digital converter (TDC) at VDD = 0.7 V for thermopile temperature sensors was designed and fabricated on 0.068mm^2 using the 90 nm CMOS technology. The small output voltages of a few mV produced by thermopile sensors is proportional to the frequency ratios in the TDC. The average resolution is 0.11ºC with the conversion time of 348 ms. Its inaccuracy is +0.18/-0.98ºC for the object temperatures from -10ºC to 100ºC at the ambient temperature of 25ºC.