Photometric Sensor for Gesture and Proximity Data Sheet ADUX1020 FEATURES GENERAL DESCRIPTION Multifunction photometric sensor and signal conditioning The ADUX1020 is a highly efficient photometric sensor with an Fully integrated AFE, ADC, LED driver, and timing core integrated 14-bit analog-to-digital converter (ADC) and a 20-bit Usable for multiple optical measurement applications, burst accumulator that works in concert with a flexible light including gesture control and proximity sensing emitting diode (LED) driver. It is designed to modulate a LED Enables an ambient light rejection capability using both and measure the corresponding optical return signal. The digital optical and analog filtering engine includes circuitry and control for data aggregation and On-chip programmable flexible current sink for external LED proximity detection. High sensitivity and signal-to-noise ratio (SNR) 2 High resolution position measurement The data output and device configuration use a 1.8 V I C interface. Gesture recognition with 0.5 cm to 15 cm range The control circuitry includes flexible LED pulse width and Proximity sensing to 20 cm period generation combined with synchronous detection. This 2 400 kHz I C interface circuitry is complemented by a low noise, low power, and wide Gesture/proximity works under infrared (IR) transparent dynamic range configurable analog front end (AFE), clock glass or other materials generation, LED driver, and digital logic for position and smart Simple integration with optics no need for precise sample mode (event driven x, y coordinates, relative z data). alignment and no lens is required This complete AFE features ambient light rejection, avoiding Low power operation corruption due to external interference. 1.8 V analog/digital core One inexpensive standard surface mount, broad angle or narrow 8-lead, 2 mm 3 mm, 0.65 mm height LFCSP angle IR LED (depending upon application) is required. This APPLICATIONS LED mounts externally to the ADUX1020. Gesture for user interface (UI) control in portable devices Packaged in a small, clear mold, 2 mm 3 mm, 8-lead LFCSP, Industrial/automation monitoring the ADUX1020 is specified over an operating temperature Presence detection range of 40C to +85C. Angle sensing FUNCTIONAL BLOCK DIAGRAM ADUX1020 AFE: SIGNAL CONDITIONING SDA SCL POSITION GESTURE ENGINE SENSOR DIGITAL INTERFACE ADC CONTROL LOGIC INT LEDX VREF LED DRIVER Figure 1. Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 2016 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 11429-001ADUX1020 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Sample/Gesture Mode ............................................................... 10 Applications ....................................................................................... 1 Use of Multiple Modes ............................................................... 10 General Description ......................................................................... 1 Adjustable Sampling Frequency ............................................... 11 Functional Block Diagram .............................................................. 1 Normal Mode Operation and Data Flow ................................ 11 Revision History ............................................................................... 2 AFE Operation............................................................................ 12 2 Specifications ..................................................................................... 3 I C Serial Interface ..................................................................... 13 Temperature and Power Specifications ..................................... 3 Typical Connection Diagram ................................................... 14 Performance Specifications ......................................................... 4 LED Driver Pin and LED Supply Voltage ............................... 14 Analog Specifications ................................................................... 5 LED Driver Operation ............................................................... 14 Digital Specifications ................................................................... 6 Determining the Average Current ........................................... 15 Timing Specifications .................................................................. 6 LED Inductance Considerations .............................................. 15 Absolute Maximum Ratings ............................................................ 7 Recommended Start-Up Sequence .......................................... 15 Thermal Resistance ...................................................................... 7 Clocks and Timing Calibration ................................................ 15 ESD Caution .................................................................................. 7 Reading Data ............................................................................... 16 Pin Configuration and Function Descriptions ............................. 8 Calculating Current Consumption .......................................... 17 Typical Performance Characteristics ............................................. 9 Recommended Soldering Profile ................................................. 19 Theory of Operation ...................................................................... 10 Complete Register Listing ............................................................. 20 Idle Mode ..................................................................................... 10 Outline Dimensions ....................................................................... 31 Standby Mode ............................................................................. 10 Ordering Guide .......................................................................... 31 Proximity Mode .......................................................................... 10 REVISION HISTORY 6/2016Revision A: Initial Version Rev. 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