TCS3471

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Technical content

TAOS Inc. is now ams AG The technical content of this TAOS datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30

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COLOR LIGHT-TO-DIGITAL CONVERTER TAOS115 − MARCH 2011 The LUMENOLOGY /C0114 Company /C0114 /C0114 Copyright /C0069 2011, TAOS Inc. www.taosinc.com

Features

/C0068Color Light Sensing − Programmable Analog Gain, Integration Time, and Interrupt Function with Upper and Lower Thresholds − Resolution Up to 16 Bits − Very High Sensitivity — Ideally Suited for Operation Behind Dark Glass − Up to 1,000,000:1 Dynamic Range /C0068Low Power Wait State − 65 /C0109A Typical Current − Wait Timer is Programmable from 2.4 ms to > 7 Seconds /C0068I2C Interface Compatible − Up to 400 kHz (I2C Fast Mode) /C0068Dedicated Interrupt Pin /C0068Pin and Register Set Compatible with the TCS3x7x Family of Devices /C0068Small 2 mm /C0121 2.4 mm Dual Flat No-Lead Package /C0068Sleep Mode — 2.5 /C0109A Typical Current

Applications

/C0068Color Temperature Sensing /C0068RGB LED Backlight Control /C0068Color Display Closed-Loop Feedback Control /C0068Ambient Light Sensing for Display Brightness Control /C0068Industrial Process Control /C0068Medical Diagnostics End Products and Market Segments /C0068HDTVs, Mobile Handsets, Tablets, Laptops, Monitors, PMP (Portable Media Payers) /C0068Medical Instrumentation /C0068Consumer Toys /C0068Industrial/Commercial Lighting

Description

The TCS3471 family of devices provides red, green, blue, and clear light sensing (RGBC) that detects light intensity under a variety of lighting conditions and through a variety of attenuation materials. An internal state machine provides the ability to put the device into a low power mode in between RGBC measurements providing very low average power consumption. The TCS3471 is directly useful in lighting conditions containing minimal IR content such as LED RGB backlight control, reflected LED color sampler, or fluorescent light color temperature detector. With the addition of an IR blocking filter, the device is an excellent ambient light sensor, color temperature monitor, and general purpose color sensor. /C0114 /C0114 Texas Advanced Optoelectronic Solutions Inc.

1001 Klein Road /C0083 Suite 300 /C0083 Plano, TX 75074 /C0083 (972) 673-0759

(TOP VIEW) VDD 1 SCL 2 GND 3

6 SDA

5 INT

Package Drawing Not to Scale ams AG Technical content still valid

COLOR LIGHT-TO-DIGITAL CONVERTER TAOS115 − MARCH 2011 /C0114 /C0114 Copyright /C0069 2011, TAOS Inc. The LUMENOLOGY /C0114 Company www.taosinc.com Functional Block Diagram SDA VDD INT SCL Wait Control Clear ADC Upper Limit Lower Limit Interrupt I2C Interface GND Red ADC Green ADC Blue ADC Clear Data Red Data Green Data Blue Data RGBC Control Blue Green Red Clear Detailed Description The TCS3471 light-to-digital device contains a 4 × 4 photodiode array, integrating amplifiers, ADCs, accumulators, clocks, buffers, comparators, a state machine, and an I2C interface. The 4 × 4 photodiode array is composed of red-filtered, green-filtered, blue-filtered, and clear photodiodes — four of each type. Four integrating ADCs simultaneously convert the amplified photodiode currents to a digital value providing up to 16 bits of resolution. Upon completion of the conversion cycle, the conversion result is transferred to the data registers. The transfers are double-buffered to ensure that the integrity of the data is maintained. Communication to the device is accomplished through a fast (up to 400 kHz), two-wire I2C serial bus for easy connection to a microcontroller or embedded controller. The TCS3471 provides a separate pin for level-style interrupts. When interrupts are enabled and a pre-set value is exceeded, the interrupt pin is asserted and remains asserted until cleared by the controlling firmware. The interrupt feature simplifies and improves system efficiency by eliminating the need to poll a sensor for a light intensity value. An interrupt is generated when the value of an RGBC conversion exceeds either an upper or lower threshold. In addition, a programmable interrupt persistence feature allows the user to determine how many consecutive exceeded thresholds are necessary to trigger an interrupt. Terminal Functions TERMINAL TYPE DESCRIPTIONNAME NO. TYPE DESCRIPTION GND 3 Power supply ground. All voltages are referenced to GND. INT 5 O Interrupt — open drain. NC 4 Do not connect SCL 2 I I2C serial clock input terminal — clock signal for I 2C serial data. SDA 6 I/O I2C serial data I/O terminal — serial data I/O for I 2C . VDD 1 Supply voltage. ams AG Technical content still valid

COLOR LIGHT-TO-DIGITAL CONVERTER TAOS115 − MARCH 2011 The LUMENOLOGY /C0114 Company /C0114 /C0114 Copyright /C0069 2011, TAOS Inc. www.taosinc.com Available Options DEVICE ADDRESS PACKAGE − LEADS INTERFACE DESCRIPTION ORDERING NUMBER TCS34711† 0x39 FN−6 I2C Vbus = VDD Interface TCS34711FN TCS34713† 0x39 FN−6 I2C Vbus = 1.8 V Interface TCS34713FN TCS34715† 0x29 FN−6 I2C Vbus = VDD Interface TCS34715FN TCS34717 0x29 FN−6 I2C Vbus = 1.8 V Interface TCS34717FN † Contact TAOS for availability. Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)† † 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 voltages are with respect to GND. Recommended Operating Conditions MIN NOM MAX UNIT Supply voltage, VDD 2.7 3 3.3 V Operating free-air temperature, TA −30 70 °C Operating Characteristics, VDD = 3 V, TA = 25/C0053C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Active 235 330 IDD Supply current Wait mode 65 μAIDD Supply current Sleep mode — no I 2C activity 2.5 10 μA V INT SDA output low voltage 3 mA sink current 0 0.4 VVOL INT, SDA output low voltage 6 mA sink current 0 0.6 V ILEAK Leakage current, SDA, SCL, INT pins −5 5 μA ILEAK Leakage current, LDR pin −1 +10 μA V SCL SDA input high voltage TCS34711 & TCS34715 0.7 VDD VVIH SCL, SDA input high voltage TCS34713 & TCS34717 1.25 V V SCL SDA input low voltage TCS34711 & TCS34715 0.3 VDD VVIL SCL, SDA input low voltage TCS34713 & TCS34717 0.54 V ams AG Technical content still valid

COLOR LIGHT-TO-DIGITAL CONVERTER TAOS115 − MARCH 2011 /C0114 /C0114 Copyright /C0069 2011, TAOS Inc. The LUMENOLOGY /C0114 Company www.taosinc.com Optical Characteristics, VDD = 3 V, TA = 25/C0053C, GAIN = 16, ATIME = 0xF6 (unless otherwise noted) (see Note 1) PARAMETER TEST Red Channel Green Channel Blue Channel Clear Channel UNITPARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX UNIT λD = 465 nm See Note 2 0% 15% 10% 42% 65% 88% 19.2 24 28.8 Re Irradiance responsivity λD = 525 nm See Note 3 8% 25% 60% 85% 9% 35% 22.4 28 33.6 (counts/ μW/ cm2)responsivity λD = 625 nm See Note 4 85% 110% 0% 15% 5% 25% 27.2 34 40.8 cm2) NOTES: 1. The percentage shown represents the ratio of the respective red, green, or blue channel value to the clear channel valu e. 2. The 465 nm input irradiance is supplied by an InGaN light-emitting diode with the following characteristics: dominant wavelength λD = 465 nm, spectral halfwidth Δλ½ = 22 nm, and luminous efficacy = 75 lm/W. 3. The 525 nm input irradiance is supplied by an InGaN light-emitting diode with the following characteristics: dominant wavelength λD = 525 nm, spectral halfwidth Δλ½ = 35 nm, and luminous efficacy = 520 lm/W. 4. The 625 nm input irradiance is supplied by a AlI nGaP light-emitting diode with the following characteristics: dominant wavelength λD = 625 nm, spectral halfwidth Δλ½ = 9 nm, and luminous efficacy = 155 lm/W. RGBC Characteristics, VDD = 3 V, TA = 25/C0053C, AGAIN = 16, AEN = 1 (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Dark ADC count value Ee = 0, AGAIN = 60×, ATIME = 0xD6 (100 ms) 0 1 5 counts ADC integration time step size ATIME = 0xFF 2.27 2.4 2.56 ms ADC number of integration steps 1 256 steps ADC counts per step 0 1024 counts ADC count value ATIME = 0xC0 (153.6 ms) 0 65535 counts Gi l i lt i t 1 × i 4× 3.8 4 4.2 Gain scaling, relative to 1× gain 16× 15 16 16 8 %Gain scaling, relative to 1× gain setting 16× 15 16 16.8 %setting 60× 58 60 63 Wait Characteristics, VDD = 3 V, TA = 25/C0053C, Gain = 16, WEN = 1 (unless otherwise noted) PARAMETER TEST CONDITIONS CHANNEL MIN TYP MAX UNIT Wait step size WTIME = 0xFF 2.27 2.4 2.56 ms Wait number of steps 1 256 steps ams AG Technical content still valid

Copyright /C0069 2011, TAOS Inc. † Specified by design and characterization; not production tested. Figure 1. Timing Diagrams

Copyright /C0069 2011, TAOS Inc. all conversions are completed and then go into a low power sleep mode. Figure 6. Simplified State Diagram power on (PON) is in register 0, bit 0. This is represented as PON (r0:b0).

transfer, the device automatically moves to the next state in accordance with the configured state machine. Figure 7. RGBC Operation

The I2C standard provides for three types of bus transaction: read, write, and a combined protocol (Figure 10). commands can also be used to clear interrupts. review the NXP I2C design specification at http://www.i2c−bus.org/references/. Figure 10. I2C Protocols

Copyright /C0069 2011, TAOS Inc. of the ADC conversions. The register set is summarized in Table 1. Table 1. Register Address control/status register for the following read/write operations.

The command registers specifies the address of the target register for future write and read operations. Table 2. Command Register COMMAND 7 Select Command Register. Must write as 1 when addressing COMMAND register.

00 Repeated byte protocol transaction

01 Auto-increment protocol transaction

10 Reserved — Do not use

11 Special function — See description below

Byte protocol will repeatedly read the same register with each data access. Block protocol will provide auto-increment function to read successive bytes.

00000 Normal — no action

00110 RGBC interrupt clear

RGBC Interrupt Clear. Clears any pending RGBC interrupt. This special function is self clearing.

Copyright /C0069 2011, TAOS Inc. interrupts as shown in Table 3. Table 3. Enable Register Reserved 7:5 Reserved. Write as 0. AIEN 4 RGBC interrupt enable. When asserted, permits RGBC interrupts to be generated. Reserved 2 Reserved. Write as 0. Power ON. This bit activates the internal oscillator to permit the timers and ADC channels to operate. interface, this bit is temporarily overridden and the oscillator is enabled, independent of the state of PON. NOTE 1: A minimum interval of 2.4 ms must pass after PON is asserted before an RGBC can be initiated. 2.4-ms increments. Max RGBC Count = (256 − ATIME) × 1024 up to a maximum of 65535. Table 4. RGBC Timing Register longer. WTIME is programmed as a 2’s complement number. Table 5. Wait Time Register

lower threshold specified, or above the higher threshold, an interrupt is asserted on the interrupt pin. Table 6. RGBC Interrupt Threshold Registers that is outside of the values specified by the threshold register for some specified amount of time. Table 7. Persistence Register APERS 3:0 Interrupt persistence. Controls rate of interrupt to the host processor.

0000 Every Every RGBC cycle generates an interrupt

Copyright /C0069 2011, TAOS Inc. The configuration register sets the wait long time. Table 8. Configuration Register Reserved 7:2 Reserved. Write as 0. Reserved 0 Reserved. Write as 0. functions such as gain settings and/or diode selection. Table 9. Control Register AGAIN 1:0 RGBC Gain Control. The ID Register provides the value for the part number. The ID register is a read-only register. Table 10. ID Register

The Status Register provides the internal status of the device. This register is read only. Table 11. Status Register AINT 4 RGBC clear channel Interrupt. AVALID 0 RGBC Valid. Indicates that the RGBC channels have completed an integration cycle. integration cycles end between the reading of the lower and upper registers. Table 12. ADC Channel Data Registers

125 Nominal

NOTES: A. All linear dimensions are in micrometers. B. The die is centered within the package within a tolerance of ± 75 μm. C. Package top surface is molded with an electrically nonconductive 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. This package contains no lead (Pb). F. This drawing is subject to change without notice. Figure 13. Package FN — Dual Flat No-Lead Packaging Configuration

Copyright /C0069 2011, TAOS Inc. NOTES: A. All linear dimensions are in millimeters. Dimension tolerance is ± 0.10 mm unless otherwise noted. B. The dimensions on this drawing are for illustrative purposes only. Dimensions of an actual carrier may vary slightly. C. Symbols on drawing A o, Bo, and Ko are defined in ANSI EIA Standard 481−B 2001. D. Each reel is 178 millimeters in diameter and contains 3500 parts. E. TAOS packaging tape and reel conform to the requirements of EIA Standard 481−B. F. In accordance with EIA standard, device pin 1 is located next to the sprocket holes in the tape. G. This drawing is subject to change without notice. Figure 14. Package FN Carrier Tape

The FN package has been tested and has demonstrated an ability to be reflow soldered to a PCB substrate. be limited to a maximum of three passes through this solder reflow profile. Table 13. Solder Reflow Profile Figure 15. Solder Reflow Profile Graph

COLOR LIGHT-TO-DIGITAL CONVERTER TAOS115 − MARCH 2011 The LUMENOLOGY /C0114 Company /C0114 /C0114 Copyright /C0069 2011, TAOS Inc. www.taosinc.com MANUFACTURING INFORMATION Moisture Sensitivity 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 dry-baked prior to being packed for shipping. Devices are 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. The FN package has been assigned a moisture sensitivity level of MSL 3 and the devices should be stored under the following conditions: Temperature Range 5 °C to 50°C Relative Humidity 60% maximum Total Time 12 months from the date code on the aluminized envelope — if unopened Opened Time 168 hours or fewer Rebaking will be required if the devices have been stored unopened for more than 12 months or if the aluminized envelope has been open for more than 168 hours. If rebaking is required, it should be done at 50°C for 12 hours. ams AG Technical content still valid

COLOR LIGHT-TO-DIGITAL CONVERTER TAOS115 − MARCH 2011 /C0114 /C0114 Copyright /C0069 2011, TAOS Inc. The LUMENOLOGY /C0114 Company www.taosinc.com 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 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). 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. 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. LUMENOLOGY, TAOS, the TAOS logo, and Texas Advanced Optoelectronic Solutions are registered trademarks of Texas Advanced Optoelectronic Solutions Incorporated. ams AG Technical content still valid