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JSSC 2013第1期Data Converters0.16μm CMOS

A CMOS Temperature Sensor With a V oltage-Calibrated Inaccuracy of 015 C 3 F r o

设计了一种用于RFID温度传感的低功耗、高精度CMOS温度传感器。
0.015°C精度，27nJ/次转换，5.3ms转换时间
CMOS温度传感器RFID低功耗zoom ADC电压校准
▸采用能量高效的二阶zoom ADC
▸提出新的积分方案减少转换时间
▸使用快速电压校准技术降低成本
Abstract
This paper describes the design of a low pow er, en- ergy-efficient CMOS smart temperature sensor intended for RFID temperature sensing. The BJT- based sensor employs an energy- efficient 2nd-order zoom ADC, which combines a coarse 5-bit SAR conversion with a fine 10-bit ΔΣ conversion. Moreover, a new inte- gration scheme is proposed that halves the conversion time, while requiring no extra supply current. To meet the stringent cost con- straints on RFID tags, a fast voltage calibration technique i