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SX9300EVK Datasheet(PDF) 1 Page - Semtech Corporation |
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SX9300EVK Datasheet(HTML) 1 Page - Semtech Corporation |
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1 / 34 page  WIRELESS & SENSING PRODUCTS Datasheet Revision 1.8 June 27, 2012 © 2012 Semtech Corporation www.semtech.com 1 SX9300 Ultra Low Power, Dual Channel Smart Proximity SAR Compliant Solution GENERAL DESCRIPTION The SX9300 is the world’s first dual channel capacitive Specific Absorption Rate (SAR) controller that accurately discriminates between an inanimate object and human body proximity. The resulting detection is used in portable electronic devices to reduce and control radio-frequency (RF) emission power in the presence of a human body, enabling significant performance advantages for manufacturers of electronic devices with EMF radiation sources to meet stringent emission regulations' criteria and Specific Absorption Rate (SAR) standards. Operating directly from an input supply voltage of 2.7 to 5.5V, the SX9300 outputs its data via a 1.65 – 5.5V host compatible I2C serial bus. The I2C serial communication bus port is compatible with 1.8V host control to report body detection/proximity and to facilitate parameter settings adjustment. Upon proximity detection, the NIRQ output asserts, enabling the user to either determine the relative proximity distance, or simply obtain an indication of detection. The serial bus can also serve to overwrite detection thresholds and operational settings in the event the user wants to change them from their factory presets. The SX9300 includes an on-chip auto-calibration controller that regularly performs sensitivity adjustments to maintain peak performance over a wide variation of temperature, humidity and noise environments, providing simplified product development and enhanced performance. A dedicated transmit enable (TXEN) pin is available to synchronize proximity measurements to RF transmission, enabling very low supply current and high noise immunity by only measuring proximity when requested. KEY PRODUCT FEATURES 2.7 – 5.5V Input Supply Voltage Dual SAR Capacitive Sensor Inputs On-Chip SAR Engine For Body versus Inanimate Object Detection Stable Proximity Sensing With Temperature 20mm detection distance Capacitance Offset Compensation to 30pF Active Sensor Guarding Automatic Calibration Ultra Low Power Consumption: Active Mode: 170 uA Doze Mode: 18 uA Sleep Mode: 2.5 uA 400KHz I2C Serial Interface Four programmable I2C Sub-Addresses Input Levels Compatible with 1.8V Host Processors Open Drain NIRQ Interrupt pin Three (3) Reset Sources: POR, NRST pin, Soft Reset -40°C to +85°C Operation Compact Size: 3 x 3mm Thin QFN package Pb & Halogen Free, RoHS/WEEE compliant APPLICATIONS • SAR Compliant Systems • Notebooks • Tablets • Mobile Phones • Mobile Hot Spots ORDERING INFORMATION Semtech P/N Package Marking SX9300IULTRT Note1 QFN-20 ZM5C SX9300EVK Eval. Kit Note 1: Quantities are ordered in 3K units per Reel TYPICAL APPLICATION CIRCUIT |
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