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Silicon Labs touts power-efficient temperature sensors

20 Jan 2015

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Silicon Labs' Si705x

Silicon Labs has announced the Si705x line of temperature sensors that consume 195nA (typical average current) when sampled once per second. The sensors target 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 devices maintain their accuracy across the full operating temperature and voltage ranges and offer four accuracy levels up to ±0.3°C. The 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 integrated low-power analogue design touts an optimal price/performance solution with up to 35 times better power efficiency than competing temperature sensor products.

Available in 3mm x 3mm DFN package, the Si705x sensors feature an I2C interface for easy configuration. Each device provides up to 14bit temperature resolution for high-precision measurement, and the -40°C to 125°C temperature range is suitable for consumer, industrial and automotive applications. With a minimum power supply voltage of 1.9V, the sensors can be connected directly to a battery without the need for an external voltage regulator.

The Si705x temperature sensors are pin-compatible and software-compatible with Silicon Labs' Si70xx RH and temperature sensor family.

Si705x sensor pricing in 10,000-unit quantities begins at $0.61. The Si705x USB dongle evaluation kits, priced at $49, streamline Si705x sensor evaluation and application development. The Si705x USB dongle kits are supported by a Windows-based GUI that simplifies control of the Si705x sensors and temperature measurements. Source codes and driver examples are available in Silicon Labs' Simplicity Studio development environment.

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