TCS3404, TCS3414 DIGITAL COLOR SENSORS TAOS137A APRIL 2011 PACKAGE CS Features 6-LEAD CHIPSCALE (TOP VIEW) Programmable Interrupt Function with User-Defined Upper and Lower Threshold SCL SYNC GND Settings A1 A2 A3 Internal Filter Eliminates Signal Fluctuation Due to AC Lighting Flicker No External Capacitor Required B1 B2 B3 In-Package Trim Provides an Easy and SDA VDD INT Accurate Means to Achieve System-to-System Repeatability 2 16-Bit Digital Output with I C at 400 kHz PACKAGE FN DUAL FLAT NO-LEAD Programmable Analog Gain and Integration (TOP VIEW) Time Supporting 1,000,000-to-1 Dynamic Range SCL 1 6 GND SYNC Input Synchronizes Integration Cycle SYNC 2 5 V to Modulated Light Sources (e.g. PWM) DD Operating Temperature Range SDA 3 4 INT 40 C to 85 C (CS Package) 30 C to 70 C (FN Package) Package Drawings are Not to Scale Operating voltage of 2.7 V to 3.6 V Available in Both an FN and a CS Package. The CS Package is the Industrys Smallest Digital RGB Color Sensor Applications End Products and Market Segments Provides Method to Derive Chromaticity HDTVs Coordinates to Manage Display Tablets, Laptops, Monitors Backlighting (i.e. RGB LED, CCFL, etc.) Medical Instrumentation Provides Means to Derive Color Consumer Toys Temperature to White-Color Balance Industrial/Commercial Lighting Displays Under Various Lighting Industrial Process Control Conditions Description The TCS3404 and TCS3414 digital color light sensors are designed to accurately derive the color chromaticity and illuminance (intensity) of ambient light and provide a digital output with 16-bits of resolution. The devices include an 8 2 array of filtered photodiodes, analog-to-digital converters, and control functions on a single monolithic CMOS integrated circuit. Of the 16 photodiodes, 4 have red filters, 4 have green filters, 4 have blue filters, and 4 have no filter (clear). With the advanced patent pending in-package trim capability, device-to-device and system-to-system tolerance can be minimized allowing very precise repeatability to be attained. The LUMENOLOGY Company Copyright 2011, TAOS Inc. Texas Advanced Optoelectronic Solutions Inc. 1001 Klein Road Suite 300 Plano, TX 75074 (972) 673-0759 www.taosinc.com 1TCS3404, TCS3414 DIGITAL COLOR SENSORS TAOS137A APRIL 2011 A synchronization input (SYNC) provides precise external control of sensor integration allowing the internal conversion cycles to be synchronized to a pulsed light source. Furthermore, the synchronization feature supports the following advanced modes of operation to maximize flexibility across a broad range of hardware systems: (1) sync for one internal-time cycle, and (2) accumulate for specified number of pulses. The device also supports free-running and serial-bus-controlled integration modes if precise coupling between the sensor and light source is not required. Four parallel analog-to-digital converters (ADC) transform the photodiode currents to an SMBus (TCS3404) or 2 I C (TCS3414) digital output that, in turn, can be input to a microprocessor. The RGB values can be read in a single read cycle to minimize the number of read command protocols defined in the communication interface. The slave address for this device is 39h (0111001b). A single SMB-Alert style interrupt (TCS3404) as well as a single traditional level-style interrupt (TCS3414) can be dynamically configured for any one of the four channels including a corresponding high/low threshold setting. The interrupt will remain asserted until the firmware clears the interrupt. The TCS3404/14 devices can help (1) automatically adjust the display brightness of a backlight to extend battery, increase lamp life, and provide optimum viewing in diverse lighting conditions, (2) white-color balance display panel and/or captured images in diverse lighting conditions, and (3) manage RGB LED backlighting to maintain color consistency over a long period of time. These devices are also ideal in controlling keyboard illumination in low ambient light conditions. Chromaticity coordinates (x,y) can be used to derive color temperature for the purpose of white-color balancing of displays and/or captured images. Illuminance, in lux, can be used to approximate the human eye response of ambient light and to manage exposure control in digital cameras. The TCS3404/14 devices are ideal in notebook/tablet PCs, LCD monitors, flat-panel televisions, cell phones, and digital cameras. Additional applications include street light control, security lighting, sunlight harvesting, and automotive instrumentation clusters. Functional Block Diagram IR-Blocking Filter (CS Package Only) Integrating A/D Converter Red Channel Integrating A/D Converter Green Channel Integrating A/D Converter Blue Channel Integrating A/D Converter Clear Channel Command 4-Parallel ADC V DD Interrupt INT Register Registers SCL Synchronization Two-Wire Serial Interface SYNC SDA Copyright 2011, TAOS Inc. The LUMENOLOGY Company 2 www.taosinc.com