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Digital temp sensors protect portable apps

Posted: 15 Jun 2010 ?? ?Print Version ?Bookmark and Share

Keywords:temperature sensor? portable application? interface?

STTS751 digital temperature sensor

STMicroelectronics is rolling out a super-small and power-efficient temperature sensor allowing portable devices to benefit from features such as intelligent thermal protection.

As today's consumer lifestyles demand unprecedented performance and portability from products such as solid-state drives, notebook computers, e-readers, smart phones, base stations and digital signage, hard-working electronics are packed into confined spaces and generate heat that can cause failure and poor reliability. ST's new STTS751 digital temperature sensor is mounted on the circuit board to feedback accurate temperature data allowing the system to manage its temperature, for example, by activating a cooling fan or shutting down circuitry.

The new sensor is smaller than previous-generation sensors, measuring 2mm x 2mm, and has an ultralow 50?A operating current, a power-saving 3?A standby current, and a one-shot mode that makes the device suitable for battery-powered devices. One-shot operation allows the sensor to sleep for extended periods, waking only to provide an instantaneous reading when triggered by the system.

The STTS751 is accurate to within 1C and communicates its temperature data via SMBus interface. This allows the sensor to be easily designed into a wide range of consumer and professional equipment.

The sensor features 2.25V operation from -40C to +125C with conversion time of 21ms (typical, at 10bit resolution). It is programmable, with 10 different conversion rates and four different resolutions

0.0625 to 32 conversions per second. In addition, it provides 9-, 10-, 11- or 12bit resolution. The STTS751 also delivers dual alarms: interrupt and thermostat.

The STTS751 is available immediately in a choice of 6-pin 2mm x 2mm UDFN-6L leadless package or a leaded SOT23-6L package, priced from $0.22 for a minimum quantity of 1,000 units. Alternative pricing options are available for larger quantities.

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