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Semtech Releases Ultra-Low Power Proximity Sensor to Differentiate Humans and Inert Objects

Semtech, a supplier of mixed-signal and analog semiconductors has declared the launch of an ultra-low power capacitive proximity sensor having on-chip specific absorption rate (SAR) engine for detecting the human body. This is probably the first economical and robust sensor that can accurately differentiate between an inert material and the human body. This innovative feature enables tablet and mobile PC manufacturers to be in line with SAR regulation for optimized voice and data communication quality of service.

The SX9300 platform belongs to the touch Interface family of Semtech. This sensor features high sensitivity, a dual channel design with integrated human body disintegration on two unique sensor sets. This configuration is capable of proximity detection having tiny sensor areas.

The SX9300 is offered in a compact 3x3 mm 20-QFn package. A wide range of small form factor sensor reference designs are offered by Semtech, which are suitable for tablet PCs. Semtech makes sure that all these devices function over the extended (-40°C to +85°C) temperature range.

These products provide designers the advantage of compactness, board space savings and RoHS/WEEE compliance contributing to hazardous waste reductions and energy conservation.

The key features of the SX9300 are:

  • Low-power operation
  • 2.7 to 5.5 V voltage operating range
  • Doze Mode: 18 µA
  • Active Mode: 170 µA
  • Sleep Mode: 2.5 µA
  • Two SAR capacitive sensor inputs having body versus inanimate object detection
  • Programmable proximity detection at a short-range
  • Ultra-small footprint of 3 x 3 mm thin 20-QFN package
  • 400kHz I²C interface and dedicated interrupt pin

The applications of the SX9300 are:

  • Tablet PC/e-book
  • SAR Compliant systems
  • Notebooks
  • Portable Gaming Devices
  • Mobile Hotspots
  • Mobile Phones

Source: http://www.semtech.com

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