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General Description TSL2591 Light-to-Digital Converter The TSL2591 is a very-high sensitivity light-to-digital converter that transforms light intensity into a digital signal output capable of direct I²C interface. The device combines one broadband photodiode (visible plus infrared) and one infrared-responding photodiode on a single CMOS integrated circuit. Two integrating ADCs convert the photodiode currents into a digital output that represents the irradiance measured on each channel. This digital output can be input to a microprocessor where illuminance (ambient light level) in lux is derived using an empirical formula to approximate the human eye response. The TSL2591 supports a traditional level style interrupt that remains asserted until the firmware clears it. Ordering Information and Content Guide appear at end of datasheet. Figure 1: Added Value of Using TSL2591 Benefits Features • Approximates Human Eye Response • Dual Diode • Flexible Operation • Programmable Analog Gain and Integration Time • Suited for Operation Behind Dark Glass • 600M:1 Dynamic Range • Low Operating Overhead • Two Internal Interrupt Sources • Programmable Upper and Lower Thresholds • One Interrupt Includes Programmable Persistence Filter • Low Power 3.0 μA Sleep State • User Selectable Sleep Mode • I²C Fast Mode Compatible Interface • Data Rates up to 400 kbit/s • Input Voltage Levels Compatible with 3.0V Bus ams Datasheet [v2-04] 2018-Jun-05 Page 1 Document Feedback

TSL2591 − General Description Block Diagram The functional blocks of this device are shown below: Figure 2: Block Diagram Page 2 Document Feedback ams Datasheet [v2-04] 2018-Jun-05

TSL2591 − Detailed Description Detailed Description The TSL2591 contains two integrating analog-to-digital converters (ADC) that integrate currents from two photodiodes. Integration of both channels occurs simultaneously. Upon completion of the conversion cycle, the conversion result is transferred to the Channel 0 and Channel 1 data registers, respectively. The transfers are double-buffered to ensure that the integrity of the data is maintained. After the transfer, the device automatically begins the next integration cycle. Communication with the device is accomplished through a standard, two-wire I²C serial bus. Consequently, the TSL2591 can be easily connected to a microcontroller or embedded controller. No external circuitry is required for signal conditioning. Because the output of the device is digital, the output is effectively immune to noise when compared to an analog signal. The TSL2591 also supports an interrupt feature that simplifies and improves system efficiency by eliminating the need to poll a sensor for a light intensity value. The primary purpose of the interrupt function is to detect a meaningful change in light intensity. The concept of a meaningful change can be defined by the user both in terms of light intensity and time, or persistence, of that change in intensity. The device has the ability to define two sets of thresholds, both above and below the current light level. An interrupt is generated when the value of a conversion exceeds either of these limits. One set of thresholds can be configured to trigger an interrupt only when the ambient light exceeds them for a configurable amount of time (persistence) while the other set can be configured to trigger an immediate interrupt. ams Datasheet [v2-04] 2018-Jun-05 Page 3 Document Feedback

Pin Assignment The TSL2591 pin assignments are described below. TSL2591 − Pin Assignment Package FN Dual Flat No-Lead (Top View): Package drawing is not to scale. Figure 3: Pin Diagram SCL 1 INT 2 GND 3 6 SDA 5 VDD 4 NC Figure 4: Pin Description Pin Number Pin Name Description 1 2 3 4 5 6 SCL INT GND NC VDD SDA I²C serial clock input terminal Interrupt — open drain output (active low). Power supply ground. All voltages are referenced to GND. No connect — do not connect. Supply voltage I²C serial data I/O terminal Page 4 Document Feedback ams Datasheet [v2-04] 2018-Jun-05

TSL2591 − Absolute Maximum Ratings Absolute Maximum Ratings Figure 5: 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 rating conditions for extended periods may affect device reliability. Parameter Min Max Units Comments Supply voltage, VDD Input terminal voltage Output terminal voltage Output terminal current Storage temperature range, Tstg ESD tolerance, human body model ESD tolerance, charge device model (CDM) 3.8 3.8 3.8 20 85 -0.5 -0.5 -1 -40 ±2000 ±500 V V V mA ºC V V All voltages are with respect to GND JESD22-A114-B JESD22-C101 ams Datasheet [v2-04] 2018-Jun-05 Page 5 Document Feedback

TSL2591 − Electrical Characteristics All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. Device parameters are guaranteed at TA = 25°C unless otherwise noted. Electrical Characteristics Figure 6: Recommended Operating Conditions Symbol VDD TA Parameter Supply voltage Operating free-air temperature Min 2.7 -30 Typ 3 Max Units 3.6 70 V ºC Figure 7: Operating Characteristics, VDD=3V, TA=25ºC (unless otherwise noted) Symbol Parameter Conditions Min IDD VOL ILEAK VIH VIL Supply current Active Sleep state - no I²C activity INT, SDA output low voltage 3mA sink current 6mA sink current Leakage current, SDA, SCL, INT pins SCL, SDA input high voltage SCL, SDA input low voltage TSL25911 (Vbus = VDD) TSL25913 (Vbus = 1.8) TSL25911 (Vbus = VDD) TSL25913 (Vbus = 1.8) 0 0 -5 0.7 VDD 1.26 Typ 275 2.3 Max Units 325 4 0.4 0.6 5 0.3 VDD 0.54 μA V μA V V Page 6 Document Feedback ams Datasheet [v2-04] 2018-Jun-05

TSL2591 − Electrical Characteristics Figure 8: ALS Characteristics, VDD=3V, TA=25ºC, AGAIN = High, AEN=1, (unless otherwise noted)(1) (2) (3) Parameter Conditions Channel Min Typ Max Units Ee = 0, AGAIN = Max, ATIME=000b (100ms) CH0 CH1 0 0 20 20 counts ATIME = 000b (100ms) 95 100 105 ms Dark ADC count value ADC integration time step size ADC number of integration steps (4) Max ADC count ATIME = 000b (100ms) Max ADC count ATIME = 001b (200ms), 010b (300ms), 011b (400ms), 100b (500ms), 101b (600ms) ADC count value White light (2) Ee = 4.98 μW/cm2 ATIME = 000b (100 ms) λp = 850 nm (3) Ee = 5.62 μW/cm2, ATIME = 000b (100 ms) ADC count value ratio: CH1/CH0 White light (2) λp = 850 nm (3) Re Irradiance responsivity Noise (4) White light (2) ATIME = 000b (100 ms) λp = 850 nm (3) ATIME = 000b (100 ms) White light (2) Ee = 4.98 μW/cm2 ATIME = 000b (100 ms) CH0 CH1 CH0 CH1 CH0 CH1 CH0 CH1 CH0 1 0 0 1120 1230 6 steps 36863 counts 65535 counts 1510 counts 1665 counts 1315 174 1447 866 0.092 0.132 0.172 0.558 0.598 0.638 264.1 34.9 257.5 154.1 counts/ (μW/cm2) 1 2 1 standard deviation ams Datasheet [v2-04] 2018-Jun-05 Page 7 Document Feedback

Parameter Conditions Channel Min Gain scaling, relative to 1× gain setting (AGAIN = Low) AGAIN = Med AGAIN = High AGAIN = Max CH0 CH1 CH0 CH1 CH0 CH1 22 22 360 360 8500 9100 TSL2591 − Electrical Characteristics Typ 24.5 24.5 400 400 9200 9900 Max Units 27 27 440 440 9900 10700 × Note(s): 1. Optical measurements are made using small-angle incident radiation from light-emitting diode optical sources. Visible white LEDs and infrared 850 nm LEDs are used for final product testing for compatibility with high-volume production 2. The white LED irradiance is supplied by a white light-emitting diode with a nominal color temperature of 4000 K. 3. The 850 nm irradiance is supplied by a GaAs light-emitting diode with the following typical characteristics: peak wavelength λp = 850 nm and spectral halfwidth Δλ½ = 42 nm. 4. Parameter ensured by design and is not 100% tested. Page 8 Document Feedback ams Datasheet [v2-04] 2018-Jun-05

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