Introduced the characteristics of the STLM75 digital temperature sensor and thermal watchdog, including measurement temperature range, accuracy, operating current, external components, I2C/SMBus compatible serial interface, power supply voltage range, conversion time, temperature threshold and hysteresis set points, pin compatibility, power-on defaults, shutdown mode, open drain output pin, etc.
The STLM75 is a high-precision digital CMOS temperature sensor IC with a sigma-delta temperature-to-digital converter and an I2C-compatible serial digital interface. It is targeted for general applications such as personal computers, system thermal management, electronics equipment, and industrial controllers. The device is packaged in the industry standard 8-lead TSSOP and SO8 packages.
The STLM75 contains a band gap temperature sensor and a 9-bit ADC which monitor and digitize the temperature to a resolution up to 0.5 °C. It is typically accurate to ±3 °C over the full temperature measurement range of -55 °C to +125 °C. The device is pin-for-pin and software compatible with the LM75B and requires no external components to measure temperature.
| Temperature range | -55°C to +125°C |
|---|---|
| Accuracy | ±0.5°C (typ) |
| Operating voltage | 2.7 V to 5.5 V |
| Conversion time | 150 ms (max) |
| Operating current | 125 µA (typ) |
| Interface | 2-wire I2C/SMBus-compatible serial interface |
| Packages | SO8, MSOP8 (TSSOP8) |
No, the STLM75 is factory-calibrated and requires no external components to measure temperature.
Yes, it is pin- and software-compatible with the LM75.
The device communicates via a serial interface with a master controller operating at speeds up to 400 kHz.