NXP LM75BGD

Overview

The LM75BGD is a temperature-to-digital converter using an on-chip band gap temperaturesensor and Sigma-Delta A-to-D conversion technique with an overtemperature detectionoutput. The LM75BGD contains a number of data registers: Configuration register (Conf) tostore the device settings such as device operation mode, OS operation mode, OS polarityand OS fault queue; temperatureregister (Temp) to store the digital temp reading, and set-point registers (Tos and Thyst) tostore programmable overtemperature shutdown and hysteresis limits, that can becommunicated by a controller via the 2-wire serial I²C-bus interface. The device alsoincludes an open-drain output (OS) which becomes active when the temperature exceedsthe programmed limits. There are three selectable logic address pins so that eight devicescan be connected on the same bus without address conflict.

The LM75BGD powers up in the normal operation mode with the OS in comparator mode,temperature threshold of 80 °C and hysteresis of 75 °C, so that it can be used as astand-alone thermostat with those pre-defined temperature set points.

Features