Description

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 (see Figure 1 on page 7). It is targeted for general applications such as personal computers, system thermal management, electronics equipment, and industrial controllers, and is packaged in the industry standard 8-lead TSSOP and SO8 packages.

The device contains a band gap temperature sensor and 9-bit ADC which monitor and digitize the temperature to a resolution up to 0.5°C. The STLM75 is typically accurate to (±3°C - max) over the full temperature measurement range of –55°C to 125°C with ±2°C accuracy in the –25°C to +100°C range. The STLM75 is pin-for-pin and software compatible with the LM75B.

Features

■ Measures temperatures from –55°C to +125°C (–67°F to +257°F)

   – ±2°C accuracy from –25°C to +100°C (max)

■ Low operating current: 125 µA (typ)

■ No external components required

■ 2-wire I2C/SMBus-compatible serial interface

   – Supports bus time-out feature

   – Selectable bus address allows connection of up to eight devices on the bus

■ Wide power supply range-operating voltage range: 2.7 V to 5.5 V

■ Conversion time is 150 ms (max)

■ Programmable temperature threshold and hysteresis set points

■ Pin- and software-compatible with LM75 (drop in replacement)

■ Power-up defaults permit standalone operation as a thermostat

■ Shutdown mode to minimize power consumption

■ Output pin (open drain) can be configured for interrupt or comparator/thermostat mode (dual purpose event pin)

■ Packages:

   – SO8

   – MSOP8 (TSSOP8)