The TMP112 is a high-accuracy, low-power, digital temperature sensor from TI. It is available in a tiny SOT563 package and requires no external components. It can read temperatures to a resolution of 0.0625°C from 0°C to +65°C with a maximum accuracy of 0.5°C. From -40°C to +125°C, the maximum accuracy is 1.0°C. The TMP112 also has both SMBus and two-wire interface compatibility, allowing up to four devices to be connected to one bus. It also features an SMBus alert function. The TMP112 is ideal for extended temperature measurement in communication, computer, consumer, environmental, industrial, and instrumentation applications.
The TMP112 digital temperature sensor provides 12‑bit resolution (0.0625 °C per LSB) and operates over a temperature range of –40 °C to +125 °C. It features low quiescent current, selectable supply range of 1.4 V to 3.6 V, and SMBus/Two‑Wire serial communication, allowing up to four devices on one bus.
The device is supplied in a SOT563 package with pull‑up resistors required on SCL, SDA, and ALERT pins. It includes an alert function, ESD protection, and is suitable for portable, battery‑powered, industrial, and medical applications where accurate temperature monitoring is needed.
| Supply Voltage (Absolute Maximum) | 5 V |
|---|---|
| Operating Supply Range | 1.4 V to 3.6 V |
| Resolution | 0.0625 °C (12‑bit) |
| Accuracy (0 °C to +65 °C) | ±0.5 °C (max) |
| Accuracy (–40 °C to +125 °C) | ±1.0 °C (max) |
| Quiescent Current (Active) | 10 µA (max) |
| Operating Temperature Range | –55 °C to +150 °C |
| Conversion Time | 26 ms (slow) to 35 ms (fast) |
The TMP112 operates with a supply voltage from 1.4 V up to 3.6 V.
The sensor provides a resolution of 0.0625 °C per LSB (12‑bit).
Up to four TMP112 devices can be connected on the same bus.