I2C Temperature Sensor

In the July/August issue of 1998 we introduced the LM75, a 9-bit temperature sensor. Since then, the same company (National Semiconductor) has made a 13-bit version available with part number LM76. The resolution has become 0.0625 (!) degrees. The component has an absolute accuracy between 0.5 and 2.5 degrees, depending on the type. It is made available for use with supply voltages of 5V or 3.3V.Apart from the LM76, the company has introduced a new part: the LM92, of which the internal block diagram is shown here. This sensor has the same properties as the LM76, but has the big advantage that it works with any supply voltage between 2.65V en 5.5V