TAOS Inc. is now ams AG The technical content of this TAOS datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: [email protected] Please visit our website at www.ams.com TSL4531 DIGITAL AMBIENT LIGHT SENSOR r r TAOS112A − OCTOBER 2012 PACKAGE CL ChipLED (TOP VIEW) Features D Simple Direct Lux Output D Approximates Human Eye Response in Diverse Lighting Conditions VDD 1 4 SCL GND 2 3 SDA D Three User-Selectable Integration Times D Wide Dynamic Range — 3 lux to 220k lux D Rejects 50 Hz/60 Hz Lighting Ripple D Low Active Current (110 A typical) with Package Drawing Not to Scale Applications Power Down Mode (2.2 A typical) Enables Green Products 16-bit Digital Output with I2C Compatibility Ultra-Small 2 mm 2 mm ChipLED package D Outdoor Lighting Control am lc s on A te G nt st il D D Description − Street Lights − Security Lights − Traffic Signals − Commercial Billboards Display Backlight Control − Automotive Instrumentation − Cell Phones − Tablets and Notebooks Solid-State and General Lighting and Daylight Harvesting − Commercial Lighting − Industrial Lighting lv D D D 2.5-V Supply Voltage with 1.8-V Logic Interface al id (400 ms, 200 ms, and 100 ms) ca 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 16-bit lux output via an I2C 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. ni Functional Block Diagram I2C Interface Lux Calc Te ADC ch VDD SCL SDA Photodiode Array The LUMENOLOGY r Company Copyright E 2012, TAOS Inc. r Texas Advanced Optoelectronic Solutions Inc. 1001 Klein Road S Suite 300 S Plano, TX 75074 S (972) r 673-0759 www.taosinc.com 1 TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 Detailed Description al id The device contains a photodiode array, an integrating analog-to-digital converter (ADC), signal processing circuitry, lux calculation logic, and an I2C 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 TYPE GND 2 SCL 4 I SDA 3 I/O VDD 1 DESCRIPTION Power supply ground. All voltages are referenced to GND. I2C serial clock input terminal. I2C serial data I/O terminal — bidirectional. Supply voltage. Available Options DEVICE lv NO. ADDRESS TSL45311 0x39 TSL45313 0x39 TSL45315 0x29 TSL4531 0x2 am lc s on A te G nt st il NAME PACKAGE − LEADS INTERFACE DESCRIPTION ORDERING NUMBER CL−4 I2C CL−4 I2C Vbus = 1.8 V Interface TSL45313CL CL−4 I2C Vbus = VDD Interface TSL45315&/ CL−4 I2C TSL45317CL Vbus = VDD InterfacH Vbus = 1.8 V Interface TSL45311CL Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)† ca Supply voltage, VDD (Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5 V 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, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −40°C to 85°C ESD tolerance, human body model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000 V † ni 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. ch Recommended Operating Conditions NOM MAX Supply voltage, VDD 2.3 2.5 3.3 V Operating free-air temperature, TA −15 70 °C Te MIN Copyright E 2012, TAOS Inc. The LUMENOLOGY r Company r r 2 UNIT www.taosinc.com TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 Operating Characteristics, VDD = 2.5 V, TA = 25C (unless otherwise noted) PARAMETER IDD Supply current ILEAK Leakage current, SDA and SCL pins VIH SCL SDA input high voltage SCL, VIL SCL SDA input low voltage SCL, TEST CONDITIONS MIN TYP MAX Active (Note 1) 110 130 Power down — no I2C activity 2.2 4 −5 TSL45311, TSL45315 0.7 VDD TSL45313, TSL45317 1.25 UNIT μA μA 5 V 0.3 VDD al id TSL45311, TSL45315 V 0.54 TSL45313, TSL45317 NOTE 1: The average supply current will be slightly lower when PSAVESKIP = 0. PARAMETER TEST CONDITIONS MIN ADC count value 65535 counts am lc s on A te G nt st il Inc std A/Fluorescent F12 (Notes 2 & 4) 80 λp = white LED, CCT = 4000K 0.8 Dynamic range Incandescent light source: STD A (Notes 3 & 4) Temperature coefficient 3 1 counts 120 % 1.2 count/lux 3 220k −15°C to 0°C −0.25 0 0°C to 70°C −0.20 0 TCNTRL = 10 96 100 104 TCNTRL = 01 192 200 208 TCNTRL = 00 384 400 416 TCNTRL = 10, PSAVESKIP = 0 (Note 5) 110.4 115 119.6 TCNTRL = 01, PSAVESKIP = 0 (Note 5) 220.8 230 239.2 TCNTRL = 00, PSAVESKIP = 0 (Note 5) 441.6 460 478.4 lux % / °C ms ms ca Combination of IR LEDs used with peak wavelengths of 880 nm and 940 nm for IR rejection production test. Incandescent STD A light source at 300 lux. Fluorescent F12 light source at 300 lux. 220,000 lux reading possible with TCNTRL set to 4× MULTIPLIER (Tint = 100 ms). Not tested in production. When PSAVESKIP = 1, total cycle time equals integration time. Te ch ni NOTES: 1. 2. 3. 4. 5. UNIT λp = 880 nm + 940 nm, Ee = 345 μW/cm2 (Note 1) Sensor output responsivity Total cycle time MAX 1000 ADC count value ratio Integration time TYP 0 λp = white LED, CCT = 4000K, EV = 1000 lux ADC count value lv ALS Characteristics, VDD = 2.5 V, TA = 25C, TCNTRL = 1 (Tint = 400 ms) (unless otherwise noted) The LUMENOLOGY r Company Copyright E 2012, TAOS Inc. r r www.taosinc.com 3 TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 AC Electrical Characteristics, VDD = 2.5 V, TA = 25C (unless otherwise noted) PARAMETER† TEST CONDITIONS MIN TYP MAX UNIT 400 kHz Clock frequency t(BUF) Bus free time between start and stop condition 4.7 μs t(HDSTA) Hold time after (repeated) start condition. After this period, the first clock is generated. 4 μs t(SUSTA) Repeated start condition setup time 4.7 μs t(SUSTO) Stop condition setup time 4 μs t(HDDAT) Data hold time 300 t(SUDAT) Data setup time 250 t(LOW) SCL clock low period 4.7 t(HIGH) SCL clock high period t(TIMEOUT) Detect clock/data low timeout tF Clock/data fall time tR Clock/data rise time Ci Input pin capacitance ns ns μs lv μs 25 35 ms 300 ns 1000 ns am lc s on A te G nt st il † 4 al id f(SCL) 10 pF Specified by design and characterization — not production tested. PARAMETER MEASUREMENT INFORMATION t(LOW) VIH SCL VIL t(R) t(F) t(HDSTA) t(BUF) t(HIGH) t(HDDAT) t(SUSTA) t(SUSTO) t(SUDAT) VIH SDA P S Stop Condition ca VIL S P Start Condition Te ch ni Figure 1. Timing Diagrams Copyright E 2012, TAOS Inc. The LUMENOLOGY r Company r r 4 www.taosinc.com TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 TYPICAL CHARACTERISTICS NORMALIZED RESPONSIVITY vs. ANGULAR DISPLACEMENT — CL PACKAGE NORMALIZED SPECTRAL RESPONSIVITY 100 1.0 90 60 4531 50 40 20 0.4 am lc s on A te G nt st il 30 0.6 lv Normalized Responsivity 70 Optical Axis Normalized Responsivity 0.8 0.2 10 0 300 500 700 900 λ − Wavelength − nm 0 −90 1100 −60 130 Output — Counts 140 120 70C ca 25C −15C ch ni IDD — A OUTPUT vs ILLUMINANCE 1000k 150 100 90 Figure 3 IDD vs. VDD 160 −30 0 30 60 − Angular Displacement − ° Figure 2 110 al id Photoptic 80 10k 100 90 2.4 Te 80 2.2 2.6 1 2.8 3 3.2 3.4 100 1 VDD − V Figure 4 The LUMENOLOGY r Company 10k 1000k Illuminance — lux Figure 5 Copyright E 2012, TAOS Inc. r r www.taosinc.com 5 TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 PRINCIPLES OF OPERATION Analog-to-Digital Converter al id The TSL4531 contains one integrating analog-to-digital converter (ADC) that integrates the current from the photodiode array. Upon completion of the conversion cycle, the conversion result is transferred to the data registers. Transfers are double-buffered to ensure that invalid data is not read during the transfer. After the transfer, the device will either automatically begin another integration cycle, or enter power-down mode, depending upon the mode setting in the control register. The device features several key power management features. The mode of operation can be controlled to provide either continuous operation or single acquisition operation followed by a power-down state. In the continuous operation, a secondary mode can be enabled allowing the device to go into a low-power state in between each acquisition cycle. Calculating Lux am lc s on A te G nt st il lv The device allows the user to control the integration time. This enables the user to control the sensitivity of the device to allow for the greater dynamic range needed in bright lighting conditions such as sunlight. Integration times of 400 ms, 200 ms, or 100 ms are available. All integration times are multiples of 50 ms, allowing rejection of 50/60-Hz ripple present in a typical fluorescent lights. The lux output needs to be scaled depending on the integration time as shown in the calculating lux section. The ADC output is a 16-bit number that is directly proportional to the value that approximates the human eye response in the commonly used illuminance unit of lux. The light level can be calculated using the following expression. Light Level (lux) = MULTIPLIER × [ (DATAHIGH << 8) + DATALOW ] Where: Example: MULTIPLIER = 1 for TCNTRL = 00 (Tint = 400 ms), MULTIPLIER = 2 for TCNTRL = 01 (Tint = 200 ms), and MULTIPLIER = 4 for TCNTRL = 10 (Tint = 100 ms), and << 8 indicates a logical 8-bit shift left operation, and TCNTRL is a 2-bit field in the configuration register (0x01) ca MULTIPLIER = 1 DATALOW = 0x9C DATAHIGH = 0x63 1 × [ (DATAHIGH << 8) + DATALOW] lux (0x63 << 8) + 0x9C lux 0x639C lux 25,500 lux Te ch ni Illuminance = = = = Copyright E 2012, TAOS Inc. The LUMENOLOGY r Company r r 6 www.taosinc.com TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 I2C Protocol Interface and control are accomplished through an I2C serial compatible interface (standard or fast mode) to a set of registers that provide access to device control functions and output data. The devices support the 7-bit I2C addressing protocol. al id The I2C standard provides for three types of bus transaction: read, write, and a combined protocol (Figure 6). During a write operation, the first byte written is a command byte followed by data. In a combined protocol, the first byte written is the command byte followed by reading a series of bytes. If a read command is issued, the register address from the previous command will be used for data access. Likewise, if the MSB of the command is not set, the device will write a series of bytes at the address stored in the last valid command with a register address. The command byte contains either control information or a 5-bit register address. The control commands can also be used to clear interrupts. ... Acknowledge (0) Not Acknowledged (1) Stop Condition Read (1) Start Condition Repeated Start Condition Write (0) Continuation of protocol Master-to-Slave Slave-to-Master 1 S am lc s on A te G nt st il A N P R S Sr W lv The I2C bus protocol was developed by Philips (now NXP). For a complete description of the I2C protocol, please review the NXP I2C design specification at http://www.i2c−bus.org/references/. 7 1 Slave Address W 1 8 A 1 Command Code 8 A 1 Data Byte A 8 1 1 ... P I2C Write Protocol 1 S 7 1 Slave Address R 1 8 A 1 Data A Data 1 ... A P I2C Read Protocol 1 S Slave Address 1 8 1 1 7 1 1 A Command Code A Sr Slave Address R A ca 7 W 8 1 Data A 8 Data 1 A 1 ... P I2C Read Protocol — Combined Format Figure 6. I2C Protocols Te ch ni 1 The LUMENOLOGY r Company Copyright E 2012, TAOS Inc. r r www.taosinc.com 7 TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 Register Set The device is controlled and monitored by data registers and a command register accessed through the serial interface. These registers provide for a variety of control functions and can be read to determine results of the ADC conversions. Table 1. Register Set RESISTER NAME R/W REGISTER FUNCTION −− COMMAND W 0x00 CONTROL R/W Power on/off and single cycle 0x01 CONFIG R/W Powersave Enable / Integration Time 0x04 DATALOW R ALS Data LOW Register 0x05 DATAHIGH R ALS Data HIGH Register 0x0A ID R Device ID RESET VALUE al id ADDRESS Specifies register address 0x00 0x00 0x00 0x00 lv 0x00 am lc s on A te G nt st il ID The mechanics of accessing a specific register depends on the specific protocol used. See the section on I2C protocols on the previous pages. In general, the COMMAND register is written first to specify the specific control/status register for following read/write operations. There are 16 register locations, but only 5 registers are implemented. To make the register read process more efficient when reading multiple bytes of data as in the combined format protocol, the address index pointer is automatically incremented to skip over the unused registers, as shown in Figure 7. Address in hex Address increments by 1 except where noted: Cycle is 0h, Ah, Bh, Ch, Dh, 0h 0 1 2 3 4 5 6 7 8 9 A B C D E F Command Register ca Figure 7. Combined Format Read Cycle Pattern ch ni The command register specifies the address of the target register for future write and read operations. It contains two user fields as described below and defaults to 0x00 at power-on. 7 COMMAND Te COMMAND 6 FIELD Table 2. Command Register 5 4 3 Reserved 2 1 ADDRESS BITS DESCRIPTION COMMAND 7 Reserved 6:4 Reserved. Write as 0. ADDRESS 3:0 Address register. Selects the specific register for write and read transactions that follow. Copyright E 2012, TAOS Inc. Select Command Register. Must write as 1. The LUMENOLOGY r Company r r 8 0 www.taosinc.com TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 Control Register (0x00) The CONTROL register is used to power the device on/off and single cycle. Table 3. Control Register 7 6 5 4 3 2 1 Reset 0x00 MODE BITS 7:2 Reserved. Write as 0. DESCRIPTION MODE 1:0 Operating Mode. This two-bit field controls the mode of the device: FIELD VALUE FUNCTION 00 Power Down lv FIELD Reserved al id Reserved CONTROL 0 Reserved 10 Run a single ADC cycle and return to PowerDown 11 Normal Operation am lc s on A te G nt st il 01 Configuration Register (0x01) The configuration register controls the integration timer and power saving enabling through two user fields. Table 4. Configuration Register 7 6 5 4 Reserved CONFIG FIELD BITS Reserved 7:4 PSAVESKIP 3 Reserved 2 TCNTRL 1:0 3 2 1 PSAVESKIP Reserved 0 TCNTRL Reset 0x00 DESCRIPTION Reserved. Write as 0. PowerSave Mode. When asserted, the power save states are skipped following a light integration cycle for shorter sampling rates (Note A). Reserved. Write as 0. Timer Control sets the integration time. FIELD VALUE MULTIPLIER PURPOSE 1× Tint = 400 ms 01 2× Tint = 200 ms 10 4× Tint = 100 ms −− Reserved ni ca 00 11 Te ch NOTES: A. When PSAVESKIP = 0, the typical total cycle time is Tint + (60/MULTIPLIER) ms. When PSAVESKIP = 1, the typical total cycle time is Tint. The LUMENOLOGY r Company Copyright E 2012, TAOS Inc. r r www.taosinc.com 9 TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 ALS Data Registers (0x04 − 0x05) The ADC data is expressed as a 16-bit word stored in two 8-bit registers. The read-only ADC data registers DATALOW and DATAHIGH provide the low and high bytes, respectively, of the 16-bit ADC conversion value. The conversion value translates directly to units of lux. Table 5. ALS Data Registers ADDRESS BITS DATALOW 0x04 7:0 ADC conversion low byte DESCRIPTION DATAHIGH 0x05 7:0 ADC conversion high byte al id REGISTER lv ID Register (0x0A) The ID register is a read-only register that provides the value for the part number. The PARTNO field indicates the part number of each device given in the Available Options section and will remain constant. 7 6 5 4 3 PARTNO CONTROL FIELD am lc s on A te G nt st il Table 6. ID Register BITS Reserved 7:4 3:0 1 0 Reserved Reset ID DESCRIPTION FIELD VALUE PARTNO 2 DEVICE PART NUMBER 1000 TSL45317 1001 TSL45313 1010 TSL45315 1011 TSL45311 Reserved The ID register is useful for validating the device type and for verifying the functionality of the interface. When used for this purpose, it is recommended that the Reserved field be masked out as follows: Te ch ni ca Value = ID AND 0xF0, where AND represents a bit-wise AND function Copyright E 2012, TAOS Inc. The LUMENOLOGY r Company r r 10 www.taosinc.com TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 HARDWARE APPLICATION INFORMATION Power Supply Decoupling PCB Pad Layout 0.95 lv Suggested PCB pad layout guidelines for the CL package is shown in Figure 8. al id The power supply lines must be decoupled with a 0.1-μF capacitor placed as close to the device package as possible. The bypass capacitor should have low effective series resistance (ESR) and effective series inductance (ESI), such as the common ceramic types, which provide a low impedance path to ground at high frequencies to handle transient currents caused by internal logic switching. am lc s on A te G nt st il 0.70 0.55 1.2 0.85 1.35 NOTES: A. All linear dimensions are in millimeters. B. This drawing is subject to change without notice. Te ch ni ca Figure 8. Suggested CL Package PCB Layout The LUMENOLOGY r Company Copyright E 2012, TAOS Inc. r r www.taosinc.com 11 TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 PACKAGE INFORMATION PACKAGE CL ChipLED TOP VIEW PIN OUT TOP VIEW Pin 1 al id 0.277 Nominal VDD 1 0.277 Nominal 4 SCL lv 2.0 0.1 3 SDA GND 2 am lc s on A te G nt st il 2.0 0.1 Photodiode Array Area END VIEW 0.3 Min 0.7 0.1 BOTTOM VIEW CL of Solder Contacts and Photodiode Array Area (Note B) 1.35 ca 0.60 0.30 0.10 ni 1.2 0.15 Pb 0.45 ch Pin 1 (Note E) CL of Solder Contacts and Photodiode Array Area (Note B) Te NOTES: A. All linear dimensions are in millimeters. B. The die is offset within the package to center the photodiode array to the solder contacts within a tolerance of ± 50 μm. C. Package top surface is molded with an electrically nonconductive yellow clear plastic compound having an index of refraction of 1.55. D. Contact finish is copper alloy A194 with pre-plated NiPdAu lead finish. E. Bottom pin 1 indicator is electrically connected to pin 1. F. This package contains no lead (Pb). G. This drawing is subject to change without notice. Figure 9. Package CL — ChipLED Packaging Configuration Copyright E 2012, TAOS Inc. The LUMENOLOGY r Company r r 12 www.taosinc.com TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 CARRIER TAPE AND REEL INFORMATION TOP VIEW 2.00 0.05 1.75 1.50 4.00 al id 4.00 B + 0.30 8.00 − 0.10 1.00 0.25 B A am lc s on A te G nt st il A lv 3.50 0.05 DETAIL B DETAIL A 5 Max 5 Max 0.254 0.02 2.18 0.05 Ao 2.18 0.05 0.83 0.05 Bo ni ca Ko All linear dimensions are in millimeters. Dimension tolerance is ± 0.10 mm unless otherwise noted. The dimensions on this drawing are for illustrative purposes only. Dimensions of an actual carrier may vary slightly. Symbols on drawing Ao, Bo, and Ko are defined in ANSI EIA Standard 481−B 2001. Each reel is 178 millimeters in diameter and contains 3500 parts. TAOS packaging tape and reel conform to the requirements of EIA Standard 481−B. In accordance with EIA standard, device pin 1 is located next to the sprocket holes in the tape. This drawing is subject to change without notice. Te ch NOTES: A. B. C. D. E. F. G. The LUMENOLOGY r Company Figure 10. Package CL Carrier Tape Copyright E 2012, TAOS Inc. r r www.taosinc.com 13 TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 SOLDERING INFORMATION The CL package has been tested and has demonstrated an ability to be reflow soldered to a PCB substrate. Table 7. Solder Reflow Profile PARAMETER REFERENCE DEVICE Average temperature gradient in preheating 2.5°C/sec tsoak 2 to 3 minutes Time above 217°C (T1) t1 Max 60 sec Time above 230°C (T2) t2 Max 50 sec Time above Tpeak −10°C (T3) t3 Max 10 sec Tpeak 260° C am lc s on A te G nt st il Peak temperature in reflow Temperature gradient in cooling Tpeak lv Soak time al id The solder reflow profile describes the expected maximum heat exposure of components during the solder reflow process of product on a PCB. Temperature is measured on top of component. The components should be limited to a maximum of three passes through this solder reflow profile. Max −5°C/sec Not to scale — for reference only T3 T2 ca Temperature (C) T1 Time (sec) t3 ni t2 t1 Figure 11. Solder Reflow Profile Graph Te ch tsoak Copyright E 2012, TAOS Inc. The LUMENOLOGY r Company r r 14 www.taosinc.com TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 STORAGE INFORMATION Moisture Sensitivity al id Optical characteristics of the device can be adversely affected during the soldering process by the release and vaporization of moisture that has been previously absorbed into the package. To ensure the package contains the smallest amount of absorbed moisture possible, each device is baked prior to being dry packed for shipping. Devices are dry packed in a sealed aluminized envelope called a moisture-barrier bag with silica gel to protect them from ambient moisture during shipping, handling, and storage before use. Shelf Life The calculated shelf life of the device in an unopened moisture barrier bag is 12 months from the date code on the bag when stored under the following conditions: lv Shelf Life: 12 months Ambient Temperature: < 40°C Relative Humidity: < 90% am lc s on A te G nt st il Rebaking of the devices will be required if the devices exceed the 12 month shelf life or the Humidity Indicator Card shows that the devices were exposed to conditions beyond the allowable moisture region. Floor Life The CL package has been assigned a moisture sensitivity level of MSL 3. As a result, the floor life of devices removed from the moisture barrier bag is 168 hours from the time the bag was opened, provided that the devices are stored under the following conditions: Floor Life: 168 hours Ambient Temperature: < 30°C Relative Humidity: < 60% If the floor life or the temperature/humidity conditions have been exceeded, the devices must be rebaked prior to solder reflow or dry packing. Rebaking Instructions Te ch ni ca When the shelf life or floor life limits have been exceeded, rebake at 50°C for 12 hours. The LUMENOLOGY r Company Copyright E 2012, TAOS Inc. r r www.taosinc.com 15 TSL4531 DIGITAL AMBIENT LIGHT SENSOR TAOS112A − OCTOBER 2012 PRODUCTION DATA — information in this document is current at publication date. Products conform to specifications in accordance with the terms of Texas Advanced Optoelectronic Solutions, Inc. standard warranty. Production processing does not necessarily include testing of all parameters. LEAD-FREE (Pb-FREE) and GREEN STATEMENT al id Pb-Free (RoHS) TAOS’ terms Lead-Free or Pb-Free mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TAOS Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br) TAOS defines Green to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material). am lc s on A te G nt st il lv Important Information and Disclaimer The information provided in this statement represents TAOS’ knowledge and belief as of the date that it is provided. TAOS bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TAOS has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TAOS and TAOS suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. NOTICE Texas Advanced Optoelectronic Solutions, Inc. (TAOS) reserves the right to make changes to the products contained in this document to improve performance or for any other purpose, or to discontinue them without notice. Customers are advised to contact TAOS to obtain the latest product information before placing orders or designing TAOS products into systems. TAOS assumes no responsibility for the use of any products or circuits described in this document or customer product design, conveys no license, either expressed or implied, under any patent or other right, and makes no representation that the circuits are free of patent infringement. TAOS further makes no claim as to the suitability of its products for any particular purpose, nor does TAOS assume any liability arising out of the use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. ca TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS, INC. PRODUCTS ARE NOT DESIGNED OR INTENDED FOR USE IN CRITICAL APPLICATIONS IN WHICH THE FAILURE OR MALFUNCTION OF THE TAOS PRODUCT MAY RESULT IN PERSONAL INJURY OR DEATH. USE OF TAOS PRODUCTS IN LIFE SUPPORT SYSTEMS IS EXPRESSLY UNAUTHORIZED AND ANY SUCH USE BY A CUSTOMER IS COMPLETELY AT THE CUSTOMER’S RISK. Te ch ni LUMENOLOGY, TAOS, the TAOS logo, and Texas Advanced Optoelectronic Solutions are registered trademarks of Texas Advanced Optoelectronic Solutions Incorporated. Copyright E 2012, TAOS Inc. The LUMENOLOGY r Company r r 16 www.taosinc.com