TI TMP121AIDBVTG4

TMP121 and TMP123 are SPI-compatible digital temperature sensors in a small SOT23-6 package. They require no external components and achieve a maximum accuracy of 2°C over a temperature range of -40°C to +125°C. With low supply current and a supply voltage range of 2.7V to 5.5V, they are well suited for low-power applications, including extended temperature measurement in communications, computing, consumer, environmental, industrial, and instrumentation applications. The TMP121 and TMP123 are 12-bit plus sign, read-only digital temperature sensors designed for thermal management and thermal protection applications. They communicate via an SPI-compatible serial interface, converting temperature to a 12-bit plus sign data word with a resolution of 0.0625°C. The rated operating temperature range is -40°C to +125°C, with an extended functional range of -55°C to +150°C. The conversion cycle is 0.5s, which helps reduce power consumption. A hardware shutdown feature provides additional power savings. No external components are required for operation; a 0.1μF supply bypass capacitor is recommended. In the TMP121 and TMP123, the sensing element is the die itself. The die attach pad of the leadframe is thermally connected to pin 2 on both devices. The GND pin (pin 2 on TMP121) and the NC pin (pin 2 on TMP123) are both thermally connected to the metal leadframe and serve as the preferred thermal input. Pins labeled NC should be left floating or connected to GND. For applications requiring air or surface temperature measurement, care should be taken to thermally isolate the package and pins from the ambient air temperature in order to maintain accuracy.

• Digital output: SPI-compatible interface
• Resolution: 12-bit plus sign, 0.0625℃
• Maximum accuracy ±1.5℃ over -25℃ to +85℃
• Maximum quiescent current 50μA
• Supply range 2.7V to 5.5V
• Compact SOT23-6 package
• Operates up to 150℃

• Power supply temperature monitoring
• Computer peripheral thermal protection
• Laptops
• Mobile phones
• Battery management
• Office equipment