SAR proximity sensor controls human RF exposure

13th September 2017
Posted By : Mick Elliott
SAR proximity sensor controls human RF exposure

The SX9310 SAR proximity sensor from Semtech is in stock at Mouser Electronics. The SX9310 is a smart sensing solution that enables smartphone and tablet manufacturers to help protect users from potentially harmful radio frequency (RF) exposure. The SAR proximity sensorregulates RF exposure to reduce specific absorption rate (SAR) — the measure of RF power that is radiated into the human body when in close proximity to a connected device.

The smart sensing solution maintains optimum network connectivity and throughput while complying with SAR regulations for optimised data and voice communication quality of service.

The device features a unique on-chip smart engine designed for human detection and advanced SAR control.

It providesbest in-class sensitivity for optimal human presence detection by offering up to three channels of high-performance capacitive sensing inputs, exceptional low temperature drift for stable measurement, and a combined proximity mode to help minimise the sensing area.

The smart sensor features ultra-low power consumption and operates directly from a 2.7V – 5.5V input supply voltage. The device’s built-in I²C serial communication bus port is compatible with the 1.8V host control to help report body detection and proximity and to facilitate parameter setting adjustments.

The SX9310 also includes an auto-calibration controller that regularly performs sensitivity adjustments to maintain peak performance over a wide variation of temperature, humidity, and noise environments.

Semtech’s SX9310 SAR proximity sensor is optimised to meet stringent emission regulations criteria and SAR safety standardsfor a wide range of consumer electronics applications, including smartphones, wearables, tablets, notebooks, and mobile hotspots.


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