Si114x Proximity and Ambient Light Sensor ICs

The QuickSense Si114x family features the industry’s most sensitive and lowest power active infrared proximity and ambient light sensor ICs. The monolithic Si114x sensors include an all digital I²C control interface and up to three infrared LED drivers in an impressively small 2 mm x 2 mm clear QFN package. Capable of controlling one, two and three-infrared LED systems, the sensors enable developers to implement one-dimensional systems with a range of up to 50 cm or multi-dimensional systems capable of advanced motion sensing with a range of up to 15 cm. The robust infrared sensing architecture works in direct sunlight and includes an ambient light sensor capable of sensing light levels up to 128 kLux.

Silicon Labs Si114x optical sensor products offer superior range and sensitivity while keeping power demands low. Use this optical sensor current estimator utility to help you determine the current consumption of your application. Specify whether you need proximity light sensing, ambient light sensing or both. Choose your channels, and view the estimated average current results in real time.

Designing Intuitive Gesture-Based Human Interface Systems

Touchless Gesturing Brings New Innovation to Electronic Product Designs

See how to enable innovative touchless user interfaces using multi-LED designs

The Si114x proximity sensor IC is supported within the QuickSense Development Studio.

Features

QuickSense integrated infrared proximity sensing with ambient light sensing
Support for advanced touchless gesturing with up to 3 independent LED drivers
Ultra-sensitive photodiodes with over 50 cm proximity range
I²C interface for ease of communication with host MCU
Adjustable proximity detection from 1 cm to over 1 m
1 to 128 kLux dynamic range enables operation in direct sunlight
Minimum reflectance sensitivity of <1uW/cm2
Short simple pulse 85.6 ns measurement minimizes power consumption
<500 nA standby current; typical 9.7 mA current consumption
Operating temperature – 40 to 85 °C
15 dynamically adjustable LED current settings

Applications

Handsets
E-book reader
Notebooks/Netbooks
Tablet PCs
Portable consumer electronics
Audio products
Security products
Tamper detection circuits
Dispensers
Valve control
Smoke detectors
Touchless switches
Touchless sliders
Occupancy sensors
Consumer electronics
Industrial automation
Display backlight control
Photo interrupters

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Data Sheet (2)

Document Name	Description	Version	Last Updated
Si114x.pdf	Si114x Data Sheet	1.2	1/17/2012
Si114x_Chinese.pdf	Si114x Data Sheet (Chinese)	1.1	5/19/2011

Data Short (3)

Document Name	Description	Version	Last Updated
Si1141_short.pdf	Si1141 Data Short	111910	1/11/2011
Si1142_short.pdf	Si1142 Data Short	111910	1/11/2011
Si1143_short.pdf	Si1143 Dat Short	111910	1/11/2011

User Guides (4)

Document Name	Description	Version	Last Updated
HID_USBtoIR-RD.pdf	HID USB to IR Reference Design User's Guide	0.1	2/23/2011
Si1140-DK.pdf	Si1140-DK User's Guide	0.2	1/11/2011
Si1142Slider-DEMO.pdf	Si1142Slider-DEMO User's Guide	0.2	1/11/2011
Si114x-MFB.pdf	Si114x-MFB User's Guide	0.1	5/10/2011

Application Notes (8)

Document Name	Description	Version	Last Updated
AN498.pdf	AN498: Si114x Designer's Guide	0.7	1/25/2012
AN521.pdf	AN521: irLED Selection Guide for Si114x Proximity Applications	0.1	1/17/2011
AN522.pdf	AN522: Using the Si1141 for Touchless Lavatory Appliances	0.1	1/12/2011
AN523.pdf	AN523: Overlay Considerations for the Si114x Sensor	0.4	8/31/2011
AN540.pdf	AN540: Hair Immune Cheek Detection in SmartPhones using the Si1141 Infrared Sensor	0.1	1/12/2011
AN541.pdf	AN541: Smoke Detection using the C8051F990 and Si1141	0.1	1/12/2011
AN576.pdf	AN576: Si114x Control Panel Application User's Guide	0.3	7/15/2011
AN580.pdf	AN580: Infrared Gesture Sensing	0.1	2/11/2011

White Papers (3)

Document Name	Description	Version	Last Updated
Designing-Gesture-Based-Human-Interface-Systems.pdf	Designing Intuitive Gesture-Based Human Interface Systems	1.0	9/13/2011
Safeguarding-Public-Access-Terminals-with-Optical-Tamper-Detection-Technology.pdf	Safeguarding Public Access Terminals with Optical Tamper Detection Technology	1.0	11/21/2011
TouchlessSensorIC_WP.pdf	Touchless Gesturing Brings New Innovation to Electronic Product Designs	0.1	1/19/2011

Miscellaneous (3)

Document Name	Description	Version	Last Updated
IRSlider2EK_QS_Guide.pdf	IRSlider2EK Si1142 Demo Board Quick-Start User's Guide	0.2	1/11/2011
Si1140DK_QS_Guide.pdf	IRSlider2EK Si1142 Demo Board Quick-Start User's Guide	0.2	1/11/2011
Si114x-MFB_qs_guide.pdf	Si114x-MFB Quick-Start Guide	0.1	5/10/2011

PCN (1)

Document Name	Description	Version	Last Updated
1201161 Si114x A11 transition std.pdf	1201161 Si114x A11 transition std

Development Kits and Featured Software

Si114x QuickSense Infrared Multi-function Board Evaluation Kit

Design Tools Expand All Collapse All

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Software (5)

Document Name	Description	Version	Updated
HID_USB_to_IR_RD.exe	HID USB to IR Reference Design PuzzleSwipe Application
IrMFB_EK.exe	Infrared Multi Function Board Evaluation Kit
IrMFB_EK_ReleaseNotes.txt	Infrared Multi Function Board Evaluation Kit Release Notes
IrSlider2_EK.exe	IrSlider2 Evaluation Kit
Si1140_DK.exe	Si1140 Development Kit

Schematics/Layout (4)

Document Name	Description	Version	Updated
ULADI_SiliconLabs_Reader.exe	ADI Ultra-Librarian Reader for CAD/CAE Schematic Footprints and Symbols .bxl Files
Si1141.bxl	Si1141 CAD/CAE Schematic Footprints and Symbols
Si1142.bxl	Si1142 CAD/CAE Schematic Footprints and Symbols
Si1143.bxl	Si1143 CAD/CAE Schematic Footprints and Symbols

Training (1)

Document Name	Description	Version	Updated
Solutions_Active_Infrared_Proximity_Sensing.pdf	Silicon Labs Solutions for Active Infrared Proximity Sensing

Product Matrix

Part Number	Available Documents	Description	Infrared Range	Package	Output Type	Dev Kit	Ambient Light Sensor
Si1141	Data Sheet Data Short	I2C proximity and ambient light sensor with 1 LED driver	50 cm	2 x 2 mm QFN10	I2C	Si1140DK	Yes
Si1142	Data Sheet Data Short	I2C proximity and ambient light sensor with 2 LED drivers	50 cm	2 x 2 mm QFN10	I2C	Si1140DK	Yes
Si1143	Data Sheet Data Short	I2C proximity and ambient light sensor with 3 LED drivers	50 cm	2 x 2 mm QFN10	I2C	Si1140DK	Yes

Education Center

Training & Resources

Featured Videos

QuickSense Portfolio Overview
QuickSense^TM Human Interface Portfolio Overview

Advanced Gesture Recognition-Go Beyond Touch Sense

Proximity & Ambient Light Sensor Solutions

Featured Web Utilities

IR Range Estimator

This web-based utility will help you determine if the object you're detecting with the Si114x proximity and ambient light sensors will be within range, and if the SNR threshold is high enough to trigger a detection event. This tool can determine if you have adequate SNR in less than a minute.
» IR Range Estimator

Optical Sensor Current Estimator

This current estimator utility will help you determine how much current is required for your application. Specify whether you need proximity light sensing, ambient light sensing, or both. Choose your channels, and view the estimated average current results in real time.
» Optical Sensor Current Estimator

Featured White Papers

Designing Intuitive Gesture-Based Human Interface Systems

Unlike human-to-human gesturing, human-machine gesturing does not have a foundation of thousands of years of history to serve as a context and this poses a challenge for human interface system designers. How does a system designer minimize the pain of "learning" gestures for the user?
» Designing Intuitive Gesture-Based Human Interface Systems

Capacitive Touch and Proximity Sensing Design Considerations

The availability of enabling technology that can revolutionize the way we interact with consumer electronics products and an urgency to incorporate this technology demonstrates the increased importance consumers are placing on interface design. What defines good human interface design, and how can system designers implement a smarter, friendlier and more intuitive solution?
» Capacitive Touch and Proximity Sensing Design Considerations

Featured Presentations and Tutorials

QuickSense™ Touchless Slider Evaluation Kit Demonstration

See how quickly and easily you can implement complex gesture recognition using intuitive software development tools for configuring, building and calibrating active infrared sensing systems.
» QuickSense™ Touchless Slider Evaluation Kit Demonstration

C8051F990 Slider Demonstration

This video provides a brief introduction to the Silicon Labs capacitance to digital converter and highlights a low power slider implemented with the C8051F990 capacitive touch sense MCU. In addition, the video provides a visual demonstration of the wake-on slide feature and the evaluation kit functions.
» C8051F990 Slider Demonstration

Solutions for Active Infrared Proximity Sensing

See a demonstration of the QuickSense™ API and learn about the structure of the projects created by the QuickSense™ Configuration Wizard.
» Solutions for Active Infrared Proximity Sensing

QuickSense™ API Demonstration

See a demonstration of the QuickSense™ API and learn about the structure of the projects created by the QuickSense™ Configuration Wizard.
» QuickSense™ API Demonstration

Music Keyboard Demo

This application example uses the Keyboard Evaluation Kit to illustrate the use of capacitive sensing switches using the C8051F700 family of MCUs with Silicon Labs Capacitance to Digital Converter (CDC) technology.
» Music Keyboard Demo

QuickSense™ Studio Demo

See how you can implement capacitive and IR sensors in minutes! This video takes you step by step through the features and operation of the QuickSense™ Studio application, a common development environment that simplifies characterization of capacitive and IR sensing systems using Silicon Labs human interface products.
» QuickSense™ Studio Demo

Sensors

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QuickSense™ Si114x Proximity and Ambient Light Sensor ICs

Features

Applications