CMOS Temperature Sensor Integrated with High-Speed 10-bit Differential SAR ADC

Signal with noise could degrade the digital output of temperature sensor. This can be overcome by implementation of differential input signaling of Analog to Digital Converter (ADC). Thus, this paper presents design and analysis of CMOS temperature sensor integrated with 10-bit differential Successive approximation register (SAR) ADC to prevent noise signal effect. The circuit has been designed using $0.18\mu \mathrm{m}$ CMOS process technology. The sensing circuit is based on bandgap reference (BGR) topology that generates Voltage Complimentary to Absolute Temperature (VCTAT) voltage. The proposed temperature sensor produced 1.89mV/°C sensitivity with maximum accuracy ±1.0°C.