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General Description TCS3472 Color Light-to-Digital Converter with IR Filter The TCS3472 device provides a digital return of red, green, blue (RGB), and clear light sensing values. An IR blocking filter, integrated on-chip and localized to the color sensing photodiodes, minimizes the IR spectral component of the incoming light and allows color measurements to be made accurately. The high sensitivity, wide dynamic range, and IR blocking filter make the TCS3472 an ideal color sensor solution for use under varying lighting conditions and through attenuating materials. The TCS3472 color sensor has a wide range of applications including RGB LED backlight control, solid-state lighting, health/fitness products, industrial process controls and medical diagnostic equipment. In addition, the IR blocking filter enables the TCS3472 to perform ambient light sensing (ALS). Ambient light sensing is widely used in display-based products such as cell phones, notebooks, and TVs to sense the lighting environment and enable automatic display brightness for optimal viewing and power savings. The TCS3472, itself, can enter a lower-power wait state between light sensing measurements to further reduce the average power consumption. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of TCS3472, Color Light-to-Digital Converter with IR Filter are listed below: Figure 1: Added Value of Using TCS3472 Benefits Features • Enables accurate color and light sensing measurements under varying lighting conditions by minimizing IR and UV spectral component effects • Red, Green, Blue (RGB), and Clear Light • Sensing with IR blocking filter • Programmable analog gain and integration time • 3,800,000:1 dynamic range • Very high sensitivity - ideally suited for operation behind dark glass • Programmable interrupt pin enables level-style interrupts when pre-set values are exceeded, thus reducing companion micro-processor overhead • Maskable interrupt • Programmable upper and lower thresholds with persistence filter ams Datasheet [v1-02] 2016-Feb-08 Page 1 Document Feedback

TCS3472 − General Description Benefits Features • Enabling a low-power wait-state between RGBC measurements to reduce average power consumption • Digital interfaces are less susceptible to noise • Backward compatibility enables interchangeability and re-usability in systems • Power management • Low power - 2.5μA sleep state • 65μA wait state with programmable wait state time from 2.4ms to > 7 seconds • I²C fast mode compatible interface • Data rates up to 400 kbit/s • Input voltage levels compatible with VDD or 1.8 VBUS • Register set and pin compatible with the TCS3x71 series • Reduces PCB space requirements while simplifying designs • Small 2mm x 2.4mm dual flat no-lead • FN package Applications The applications of TCS3472 include: • RGB LED backlight control • Light color temperature measurement • Ambient light sensing for display backlight control • Fluid and gas analysis • Product color verification and sorting End Products and Market Segments • TVs, mobile handsets, tablets, computers, and monitors • Consumer and commercial printing • Medical and health fitness • Solid state lighting (SSL) and digital signage • Industrial automation Page 2 Document Feedback ams Datasheet [v1-02] 2016-Feb-08

TCS3472 − General Description Figure 2: Functional Block Diagram Block Diagram The functional blocks of this device are shown below: ams Datasheet [v1-02] 2016-Feb-08 Page 3 Document Feedback

Detailed Description TCS3472 − Detailed Description The TCS3472 light-to-digital converter contains a 3 × 4 photodiode array, four analog-to-digital converters (ADC) that integrate the photodiode current, data registers, a state machine, and an I²C interface. The 3 × 4 photodiode array is composed of red-filtered, green-filtered, blue-filtered, and clear (unfiltered) photodiodes. In addition, the photodiodes are coated with an IR-blocking filter. The four integrating ADCs simultaneously convert the amplified photodiode currents to a 16-bit digital value. Upon completion of a conversion cycle, the results are transferred to the data registers, which are double-buffered to ensure the integrity of the data. All of the internal timing, as well as the low-power wait state, is controlled by the state machine. Communication of the TCS3472 data is accomplished over a fast, up to 400 kHz, two-wire I²C serial bus. The industry standard I²C bus facilitates easy, direct connection to microcontrollers and embedded processors. In addition to the I²C bus, the TCS3472 provides a separate interrupt signal output. When interrupts are enabled, and user-defined thresholds are exceeded, the active-low interrupt is asserted and remains asserted until it is cleared by the controller. This interrupt feature simplifies and improves the efficiency of the system software by eliminating the need to poll the TCS3472. The user can define the upper and lower interrupt thresholds and apply an interrupt persistence filter. The interrupt persistence filter allows the user to define the number of consecutive out-of-threshold events necessary before generating an interrupt. The interrupt output is open-drain, so it can be wire-ORed with other devices. Page 4 Document Feedback ams Datasheet [v1-02] 2016-Feb-08

TCS3472 − Pin Assignment Pin Assignment Package FN Dual Flat No-Lead (Top View): Package drawing is not to scale. The TCS3472 pin assignment is described below. Figure 3: Pin Diagram VDD 1 SCL 2 GND 3 6 SDA 5 INT 4 NC Figure 4: Pin Description Pin Number Pin Name Pin Type Description 1 2 3 4 5 6 VDD SCL GND NC INT SDA Supply voltage Input I²C serial clock input terminal – clock signal for I²C serial data Power supply ground. All voltages are referenced to GND Output Output No connect - do not connect Interrupt - open drain (active low). Input/Output I²C serial data I/O terminal - serial data I/O for I²C. ams Datasheet [v1-02] 2016-Feb-08 Page 5 Document Feedback

Absolute Maximum Ratings TCS3472 − Absolute Maximum Ratings Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only. 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. Figure 5: Absolute Maximum Ratings over Operating Free-Air Temperature Range (unless otherwise noted) Parameter Min Max Units Comments All voltages are with respect to GND Supply voltage, VDD Input terminal voltage Output terminal voltage Output terminal current Storage temperature range, Tstrg 3.8 3.8 3.8 20 85 - 0.5 - 0.5 - 1 - 40 ESD tolerance, human body model ±2000 V V V mA ºC V Page 6 Document Feedback ams Datasheet [v1-02] 2016-Feb-08

TCS3472 − Electrical Characteristics Electrical Characteristics Figure 6: Recommended Operating Conditions All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. Symbol Parameter Conditions Min Typ Max Units TCS34721 and TCS34725 (I²C VBUS = VDD) TCS34723 and TCS34727 (I²C VBUS = 1.8 V) VDD Supply voltage TA Operating free - air temperature 3 3 2.7 2.7 -30 3.6 3.3 70 V ºC Figure 7: Operating Characteristics, VDD = 3 V, TA = 25ºC (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units IDD Supply current VOL INT SDA output low voltage Active Wait state Sleep state - no I²C activity 3 mA sink current 6 mA sink current 235 65 2.5 330 10 0.4 0.6 5 5 0 0 -5 -5 μA V μA V V Leakage current, SDA, SCL, INT pins Leakage current, LDR pin SCL SDA input high voltage ILEAK VIH VIL TCS34721 and TCS34725 0.7 VDD TCS34723 and TCS34727 1.25 SCL SDA input low voltage TCS34721 and TCS34725 TCS34723 and TCS34727 0.3 VDD 0.54 ams Datasheet [v1-02] 2016-Feb-08 Page 7 Document Feedback

TCS3472 − Electrical Characteristics Figure 8: Optical Characteristics, VDD=3 V, TA= 25ºC, AGAIN = 16, ATIME = 0xF6 (unless otherwise noted)(1) Parameter Test Conditions Re Irradiance responsivity λD = 465 nm(2) λD = 525 nm(3) λD = 615 nm(4) Red Channel Green Channel Blue Channel Clear Channel Min Max Min Max Min Max Min Typ Max 0% 15% 10% 42% 65% 88% 11.0 13.8 16.6 4% 25% 60% 85% 10% 45% 13.2 16.6 20.0 80% 110% 0% 14% 5% 24% 15.6 19.5 23.4 Unit counts /μW /cm2 Notes: 1. The percentage shown represents the ratio of the respective red, green, or blue channel value to the clear channel value. 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. 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. 4. The 615 nm input irradiance is supplied by a AlInGaP light-emitting diode with the following characteristics: dominant wavelength λD = 615 nm, spectral halfwidth Δλ½ = 15 nm. Page 8 Document Feedback ams Datasheet [v1-02] 2016-Feb-08

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