Silicon Labs has introduced a new family of ultra-low-power Si705x temperature sensors that consume only 195 nA (typical average current) when sampled once per second, which minimizes self-heating and enables multi-year coin cell battery operation. Unlike traditional digital temperature sensors, the Si705x devices maintain their accuracy across the full operating temperature and voltage ranges and offer four accuracy levels up to +/-0.3 °C. The sensors are ideal for HVAC, white goods, computer equipment, asset tracking, cold chain storage, industrial control and medical equipment. AEC-Q100-qualified versions are also available for automotive applications.
The Si705x sensors’ patented signal processing technology provides stable temperature accuracy over the entire operating voltage and temperature ranges without the need for costly end-of-line production calibration. In addition, the company claims that the integrated low-power analog design delivers an optimal price/performance solution with up to 35 times better power efficiency than competing temperature sensor products.
Available in a compact 3 mm x 3 mm DFN package, the Si705x sensors feature an industry-standard I2C interface for easy configuration. Each device provides up to 14-bit temperature resolution for high-precision measurement, and the -40 to +125 °C temperature range is suitable for consumer, industrial and automotive applications. With a low 1.9 V minimum power supply voltage, the Si705x sensors can be connected directly to a battery without the need for an external voltage regulator.