Title :
A 3 V thermostat circuit
Author :
Can, Sumer ; Richards, Mark S. ; Pease, Robert A.
Author_Institution :
Nat. Semicond. Corp., Santa Clara, CA, USA
fDate :
29 Sep-1 Oct 1996
Abstract :
An integrated thermostat circuit is described in this paper. It contains a bandgap reference, a temperature sensor and two hysteresis comparators. Two temperature trip points are generated by dividing down the bandgap voltage reference using three external resistors or an internal resistive network. The temperature sensor circuit generates a voltage proportional to temperature. Two comparators are designed for a 3 degree C internal hysteresis, and their outputs support CMOS/TTL logic levels. The circuit works with a supply voltage of 2.7 V to 10 V. It shows a trip point accuracy better than 2 degree C at room temperature and 3 degree C over the temperature ranging from -40 degree C to 125 degree C. The temperature sensor output voltage slope is 6.25 mV per degree C. The thermostat is fabricated using a standard bipolar process, and packaged in an 8-pin SOT package
Keywords :
analogue processing circuits; bipolar analogue integrated circuits; comparators (circuits); reference circuits; temperature control; temperature sensors; thermostats; -40 to 125 C; 2.7 to 10 V; 3 V; 8-pin SOT package; bandgap reference; hysteresis comparators; integrated thermostat circuit; standard bipolar process; temperature sensor; trip point accuracy; CMOS logic circuits; Hysteresis; Logic design; Packaging; Photonic band gap; Resistors; Temperature distribution; Temperature sensors; Thermostats; Voltage;
Conference_Titel :
Bipolar/BiCMOS Circuits and Technology Meeting, 1996., Proceedings of the 1996
Conference_Location :
Minneapolis, MN
Print_ISBN :
0-7803-3516-3
DOI :
10.1109/BIPOL.1996.554619
