Semtech: Proximity Sensor

Posted 7 March 2016

Semtech Corporation has announced the SX9306, a new addition to its SX9300 family of proximity sensors that minimizes radio-frequency (RF) exposure by selectively reducing radio-frequency power in mobile phones and tablets. The SX9306 is an ultra-low power, capacitive proximity sensor with an on-chip smart engine for human body detection and advanced SAR (Specific Absorption Rate) control. The on-chip smart engine can detect the permittivity of different surfaces, giving it the ability to accurately discriminate between inanimate objects or human body.

The SX9306 is part of Semtech’s SX9300 smart proximity sensing platform. The part has four high-resolution capacitive sensor inputs with sensing resolution of 0.08 femto-farad (fF). Each sensor also features a capacitance-offset compensation of up to 30 picofarads (pF). With its integrated RF shield, the device provides very robust noise immunity and eliminates false triggers that commonly occur in these applications.



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