A high performance temperature monitoring sensor for security chip is designed

based on GF 0. 18 μm standard CMOS process. The sensor is designed by the forward bias voltage of PN junction varying with temperature approximately linearly to monitor ambient temperature change

it has high integration density

reliability and low power consumption and also can work in wide temperature range. Test result shows that in test temperature range of- 50

140 ℃

the temperature coefficient is- 4. 47 mV /℃ with good linearity. When power supply voltage is 3. 3 V

power consumption is only 10. 04 μW

which meets design requirements of security chip.