SX9306 Ultra Low Power, Smart Proximity Sensor for SAR WIRELESS & SENSING GENERAL DESCRIPTION KEY PRODUCT FEATURES The SX9306 is an ultra-low power capacitive Specific 2.7 5.5V Input Supply Voltage Absorption Rate (SAR) controller that accurately Up to 4 Capacitive Sensor Inputs discriminates between an inanimate object and human body Patented On-Chip Smart Engine for Human Detection and proximity. The resulting detection is used in portable Advanced SAR Control electronic devices to reduce and control radio-frequency High Resolution Capacitive Sensing down to 0.08fF (RF) emission power in the presence of a human body, Capacitance Offset Compensation up to 30pF enabling significant performance advantages for Configurable Proximity Detection (single/combined) manufacturers of electronic devices with electro-magnetic Integrated High Performance RF Shield for Enhanced radiation sources to meet stringent emission regulations Noise Immunity criteria and Specific Absorption Rate (SAR) standards. Extremely Low Temperature Drift for Stable Measurement Operating directly from an input supply voltage of 2.7 to Reduced VDD Ripple Susceptibility 5.5V, the SX9306 outputs its data via a 1.65 5.5V host compatible I2C serial bus. Active Sensor Guarding Automatic Calibration The I2C serial communication bus port is compatible with 1.8V host control to report body detection/proximity and to Ultra Low Power Consumption: facilitate parameter settings adjustment. Upon proximity Active Mode: 170 uA detection, the NIRQ output asserts, enabling the user to Doze Mode: 18 uA Sleep Mode: 2.5 uA either determine the relative proximity distance, or simply obtain an indication of detection. 400kHz I2C Serial Interface Four programmable I2C Sub-Addresses The SX9306 includes an on-chip auto-calibration controller Input Levels Compatible with 1.8V Host Processors that regularly performs sensitivity adjustments to maintain Open Drain NIRQ Interrupt pin peak performance over a wide variation of temperature, humidity and noise environments, providing simplified Up to Three Reset Sources: POR, Soft Reset, NRST product development and enhanced performance. -40C to +85C Operation In QFN package, a dedicated transmit enable (TXEN) pin is 1.63x1.23 mm WLCSP or 3x3mm Thin QFN package available to synchronize capacitive measurements for QFN version pin-to-pin compatible with applications that require synchronous detection, enabling SX9300/SX9500 very low supply current and high noise immunity by only Pb & Halogen Free, RoHS/WEEE compliant measuring proximity when requested. APPLICATIONS SAR Compliant Systems Tablets/Phablets Mobile Phones Wearable Devices ORDERING INFORMATION Part Number Package Marking (1) SX9306ICSTRT WLCSP-12 MH06 (2) SX9306ICBTRT WLCSP-12 MB06 SX9306IULTRT QFN-20 A39E SX9306EVKA Eval. Kit - (1) (2) Without Backside Coating With Backside Coating TYPICAL APPLICATION CIRCUIT VDD CS0 Smart POR Engine SVDD CS1* Cap Sense OSC CS3 and ADC RF CS2 Shield SCL SDA CSG SENSORS HOST NIRQ AUTO CAL & CONTROL NRST*, TXEN* * Internal/not-bonded out in WLCSP package A0 GND A1 SX9306 Revision 5 Oct 30, 2014 2014 Semtech Corporation www.semtech.com 1 SX9306 Ultra Low Power, Smart Proximity Sensor for SAR WIRELESS & SENSING Semtech 2014 All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. 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