TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112 OCTOBER 2011 PACKAGE CL Features ChipLED Simple Direct Lux Output (TOP VIEW) Approximates Human Eye Response in V 1 4 SCL Diverse Lighting Conditions DD Three User-Selectable Integration Times (400 ms, 200 ms, and 100 ms) GND 2 3 SDA Wide Dynamic Range 3 lux to 220k lux Rejects 50 Hz/60 Hz Lighting Ripple Package Drawing Not to Scale Low Active Current (110 A typical) with Applications Power Down Mode (2.2 A typical) Enables Green Products Outdoor Lighting Control 2 Street Lights 16-bit Digital Output with I C Compatibility Security Lights Ultra-Small 2 mm 2 mm ChipLED package Traffic Signals 2.5-V Supply Voltage with 1.8-V Logic Commercial Billboards Interface Display Backlight Control Automotive Instrumentation Cell Phones Tablets and Notebooks Solid-State and General Lighting and Daylight Harvesting Commercial Lighting Industrial Lighting Description The TSL4531 family of devices provides ambient light sensing (ALS) that approximates human eye response under a variety of lighting conditions. The devices have three selectable integration times and provide a direct 2 16-bit lux output via an I C bus interface. The wide dynamic range of the ALS makes it particularly useful in outdoor applications where it is exposed to direct sunlight. The device is ideal for use in automatic control of street lights and security, billboard, and automotive lighting. The TSL4531 devices can also be used in solid state and general lighting for automatic control and daylight harvesting to maximize energy conservation. Other applications include display backlight control to extend battery life and optimize visibility in cell phones, tablets, and notebooks. Functional Block Diagram V DD SCL SDA Photodiode Array 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 1 ADC Lux Calc 2 I C InterfaceTSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112 OCTOBER 2011 Detailed Description The device contains a photodiode array, an integrating analog-to-digital converter (ADC), signal processing 2 circuitry, lux calculation logic, and an I C serial interface on a single CMOS integrated circuit to provide lux data with a 16-bit output. No external circuitry is required for signal conditioning. The device features power management modes where the user can select continuous operation, power save mode in which the device inserts a power saving state between each acquisition, or single-cycle operation in which the device enters a power-down state after data acquisition. The device has three user-selectable integration times of 100 ms, 200 ms, or 400 ms, allowing the user to adjust the sensitivity of the device. Terminal Functions TERMINAL TYPETYPE DESCRIPTIONDESCRIPTION NAME NO. GND 2 Power supply ground. All voltages are referenced to GND. 2 SCL 4 I I C serial clock input terminal. 2 SDA 3 I/O I C serial data I/O terminal bidirectional. V 1 Supply voltage. DD Available Options DEVICE ADDRESS PACKAGE LEADS INTERFACE DESCRIPTION ORDERING NUMBER 2 TSL45311 0x39 CL4 I C Vbus = V Interface TSL45311CL DD 2 TSL45313 0x39 CL4 I C Vbus = 1.8 V Interface TSL45313CL 2 TSL45315 0x29 CL4 I C Vbus = V Interface TSL45315CL DD 2 TSL45317 0x29 CL4 I C Vbus = 1.8 V Interface TSL45317CL Contact TAOS for availability. Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, V (Note 1) 4.5 V DD Input terminal voltage . 0.5 V to 4.5 V Output terminal voltage . 0.5 V to 4.5 V Output terminal current . 1 mA to 20 mA Storage temperature range, T 4 0C to 85C stg ESD tolerance, human body model 2000 V Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTE 1: All voltage values are with respect to GND. Recommended Operating Conditions MIN NOM MAX UNIT Supply voltage, V 2.3 2.5 3.3 V DD Operating free-air temperature, T 15 70 C A Copyright 2011, TAOS Inc. The LUMENOLOGY Company 2 www.taosinc.com