A 3 V thermostat circuit

Author

Can, Sumer ; Richards, Mark S. ; Pease, Robert A.

Author_Institution

Nat. Semicond. Corp., Santa Clara, CA, USA

fYear

1996

fDate

29 Sep-1 Oct 1996

Firstpage

105

Lastpage

108

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Bipolar/BiCMOS Circuits and Technology Meeting, 1996., Proceedings of the 1996

Conference_Location

Minneapolis, MN

ISSN

1088-9299

Print_ISBN

0-7803-3516-3

Type

conf

DOI

10.1109/BIPOL.1996.554619

Filename

554619