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2019•Unpublished venueRequires access

A Low-Temperature-Coefficient and High-PSRR Bandgap Reference for Readout Circuit of SPAD

YE Xuefeng, Duoduo Zeng, Xiangliang Jin, Yang Wang

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Abstract

In this paper, a bandgap voltage reference (BGR) with a low temperature coefficient, used for readout circuits of SPAD, has been designed and fabricated successfully in the standard MXIC 0.5μm 1P3M CMOS process. The area of the core circuit occupies 244×215μm2. The test results show that the designed bandgap reference could work normally under the power supply voltage of 2.8V to 8V with a line regulation (LNR) of 0.0096%. At room temperature (25°C), the stable reference output voltage is 1.168V. The reference voltage varies by only 1.8mV within the temperature range of 0~150°C, and leads to a temperature coefficient of 10.28ppm/°C. Under the power supply of 5V, the BGR chip exhibits a power supply rejection ratio (PSRR) of 76.4dB at 1KHz.

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What this paper is about

In this paper, a bandgap voltage reference (BGR) with a low temperature coefficient, used for readout circuits of SPAD, has been designed and fabricated successfully in the standard MXIC 0.5μm 1P3M CMOS process. The area of the core circuit occupies 244×215μm2. The test results show that the designed bandgap reference could work normally under the power supply voltage of 2.8V to 8V with a line regulation (LNR) of 0.0096%. At room temperature (25°C), the stable reference output voltage is 1.168V. The reference voltage varies by only 1.8mV within the temperature range of 0~150°C, and leads to a temperature coefficient of 10.28ppm/°C. Under the power supply of 5V, the BGR chip exhibits a power supply rejection ratio (PSRR) of 76.4dB at 1KHz.

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Available abstract

In this paper, a bandgap voltage reference (BGR) with a low temperature coefficient, used for readout circuits of SPAD, has been designed and fabricated successfully in the standard MXIC 0.5μm 1P3M CMOS process. The area of the core circuit occupies 244×215μm2. The test results show that the designed bandgap reference could work normally under the power supply voltage of 2.8V to 8V with a line regulation (LNR) of 0.0096%. At room temperature (25°C), the stable reference output voltage is 1.168V. The reference voltage varies by only 1.8mV within the temperature range of 0~150°C, and leads to a temperature coefficient of 10.28ppm/°C. Under the power supply of 5V, the BGR chip exhibits a power supply rejection ratio (PSRR) of 76.4dB at 1KHz.

Key concepts: Bandgap voltage reference, Power supply rejection ratio, Temperature coefficient, Voltage reference, CMOS, Electrical engineering, Voltage, Materials science

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