TMP126-Q1

The TMP126-Q1 is a high-accuracy digital temperature sensor from Texas Instruments, designed for automotive and industrial applications requiring reliable thermal monitoring. It features an integrated analog-to-digital converter (ADC) that delivers ±0.5°C accuracy over the full operating temperature range of –40°C to +125°C, with a resolution as fine as 0.0625°C. This precision makes it ideal for systems where accurate temperature measurement is critical, such as battery management, motor control, and power electronics. The device operates on a supply voltage range of 2.7V to 5.5V, making it compatible with both 3.3V and 5V logic systems. It supports I²C-compatible serial communication at speeds up to 400 kHz, enabling efficient data transfer with minimal external components. The sensor includes a programmable alert function, allowing users to set upper and lower temperature thresholds for interrupt generation, which helps reduce microcontroller load by triggering alerts only when necessary. Built to meet AEC-Q100 Grade 1 qualification standards, the TMP126-Q1 is engineered for harsh environments typical in automotive systems, including wide temperature swings, vibration, and electromagnetic interference. Its robust design ensures long-term reliability in demanding conditions, such as engine compartments, powertrain modules, and electric vehicle (EV) battery packs. The chip offers low power consumption—just 1.5 μA in shutdown mode and 300 μA during active conversion—making it suitable for battery-powered or energy-sensitive applications. It also includes built-in self-test functionality and fault detection mechanisms, enhancing system safety and diagnostic capabilities. These features are especially valuable in safety-critical systems like ADAS (Advanced Driver Assistance Systems) and onboard diagnostics. With a compact 3mm × 3mm WSON package, the TMP126-Q1 provides a space-efficient solution for densely populated PCBs. Its compatibility with standard surface-mount assembly processes simplifies integration into existing production lines. Additionally, the device supports remote sensing through its two-wire interface, enabling flexible placement of the sensor away from the host controller without signal degradation.