Texas Instruments TMP100NA/3K Digital Temperature Sensor IC, 6-Pin SOT-23

The Texas Instruments TMP100NA/3K is a precision digital temperature sensor IC designed as a direct replacement for negative temperature coefficient (NTC) and positive temperature coefficient (PTC) thermistors. It delivers a typical accuracy of ±1°C without requiring calibration or external signal conditioning, simplifying design and reducing component count.

The device features an on-chip 12-bit ADC that provides temperature resolutions down to 0.0625°C, ensuring highly linear and accurate readings without complex calculations or look-up tables. It supports SMBus, 2-wire, and I²C interfaces, making it versatile for a wide range of digital systems. Up to eight devices can be connected on a single bus, and the TMP101 variant adds an SMBus Alert function for monitoring up to three devices per bus.

Key features include user-selectable resolution from 9 to 12 bits, two address pins for flexible addressing, and a low 45µA quiescent current for power-sensitive applications. The sensor operates over a wide temperature range from -55°C to +125°C, with a supply voltage range of 2.7V to 5.5V. It comes in a compact SOT-23 package with 6 pins, making it suitable for space-constrained designs.

This IC is ideal for use in communications and networking equipment, where accurate and reliable temperature monitoring is essential. Its high accuracy, low power consumption, and digital output make it an excellent choice for modern electronic systems.