Digital temperature sensors displacing thermistors

23 February 2005 Power Electronics / Power Management

IC temperature sensors are quickly replacing thermistors as the preferred method of temperature monitoring for many mainstream applications. Thermistors have long been favoured for their very small form factor, low cost, and high sensitivity. But the same advances in CMOS design and fabrication technology that drive exponential increases in computing power are providing similar improvements in IC temperature sensors.

Today's digital sensors, such as those available from Analog Devices, have higher accuracy (up to ±0,5°C), lower power consumption, and additional integrated features, all at a lower cost and in a smaller package than their predecessors. Designers also prefer digital temperature sensors because they are simple to design-in. Unlike thermistors, digital IC temperature sensors do not require additional analog-to-digital conversion or linearisation circuits with their associated additional costs and board space requirements.

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