TSL2771 Light-to-Digital Converter with Proximity Sensing General Description The TSL2771 family of devices provides both ambient light sensing (ALS) and proximity detection (when coupled with an external IR LED). The ALS approximates human eye response to light intensity under a variety of lighting conditions and through a variety of attenuation materials. The proximity detection feature allows a large dynamic range of operation for use in short distance detection behind dark glass such as in a cell phone or for longer distance measurements for applications such as presence detection for monitors or laptops. The programmable proximity detection enables continuous measurements across the entire range. In addition, an internal state machine provides the ability to put the device into a low power mode in between ALS and proximity measurements providing very low average power consumption. While useful for general purpose light sensing, the device is particularly useful for display management with the purpose of extending battery life and providing optimum viewing in diverse lighting conditions. Display panel and keyboard backlighting can account for up to 30 to 40 percent of total platform power. The ALS features are ideal for use in tablets, notebook PCs, LCD monitors, flat-panel televisions, and cell phones. The proximity function is targeted specifically towards cell phone, LCD monitor, laptop, and flat-panel television applications. In cell phones, the proximity detection can detect when the user positions the phone close to their ear. The device is fast enough to provide proximity information at a high repetition rate needed when answering a phone call. It can also detect both close and far distances so the application can implement more complex algorithms to provide a more robust interface. In laptop or monitor applications, the product is sensitive enough to determine whether a user is in front of the laptop using the keyboard or away from the desk. This provides both improved green power saving capability and the added security to lock the computer when the user is not present. Ordering Information and Content Guide appear at end of datasheet. ams Datasheet [v1-00] 2016-Mar-22 Page 1 Document Feedback TSL2771 - General Description Key Benefits & Features The benefits and features of TSL2771, Light-to-Digital Converter with Proximity Sensing are listed below: Figure 1: Added Value of Using TSL2771 Benefits Features * Enables Operation in IR Light Environments * Patented Dual-Diode Architecture * Enables Operation in 10k Lux Sunlight and Accurate Sensing Behind Spectrally Distorting Materials * 1M:1 Dynamic Range * Allows Multiple Power-Level Selection Without External Passives * Programmable LED Drive Current * Reduces Micro-Processor Interrupt Overhead * Programmable Interrupt Function * Reduces board Space Requirements while Simplifying Designs * Area Efficient 2mm x 2mm Dual Flat No-Lead (FN) Package * Ambient Light Sensing and Proximity Detection in a Single Device * Ambient Light Sensing (ALS) * Approximates Human Eye Response * Programmable Analog Gain * Programmable Integration Time * Programmable Interrupt Function with Upper and Lower Threshold * Resolution Up to 16 Bits * Very High Sensitivity -- Operates Well Behind Darkened Glass * Up to 1,000,000:1 Dynamic Range * Proximity Detection * Programmable Number of IR Pulses * Programmable Current Sink for the IR LED -- No Limiting Resistor Needed * Programmable Interrupt Function with Upper and Lower Threshold * Covers a 2000:1 Dynamic Range * Programmable Wait Timer * Programmable from 2.72 ms to > 8 Seconds * Wait State -- 65 mA Typical Current * IC Interface Compatible * Up to 400 kHz (IC Fast Mode) * Dedicated Interrupt Pin * Sleep Mode - 2.5 mA Typical Current Page 2 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - General Description Applications TSL2771, Light-to-Digital Converter with Proximity Sensing is ideal for: * Cell Phone Backlight Dimming * Cell Phone Touch Screen Disable * Notebook/Monitor Security * Automatic Speakerphone Enable * Automatic Menu Popup Functional Block Diagram The functional blocks of this device are shown below: Figure 2: TSL2771 Block Diagram Interrupt IR LED Constant Current Sink LDR Prox Control GND Prox Integration Prox ADC INT Upper Limit Prox Data Lower Limit SCL Wait Control Upper Limit CH0 ADC CH0 Data ALS Control CH0 CH1 ADC Lower Limit I2C Interface VDD SDA CH1 Data CH1 ams Datasheet [v1-00] 2016-Mar-22 Page 3 Document Feedback TSL2771 - Detailed Description Detailed Description The TSL2771 light-to-digital device provides on-chip photodiodes, integrating amplifiers, ADCs, accumulators, clocks, buffers, comparators, a state machine, and an IC interface. Each device combines a Channel 0 photodiode (CH0), which is responsive to both visible and infrared light, and a channel 1 photodiode (CH1), which is responsive primarily to infrared light. Two integrating ADCs simultaneously convert the amplified photodiode currents into 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. This digital output can be read by a microprocessor through which the illuminance (ambient light level) in Lux is derived using an empirical formula to approximate the human eye response. Communication to the device is accomplished through a fast (up to 400 kHz), two-wire IC serial bus for easy connection to a microcontroller or embedded controller. The digital output of the device is inherently more immune to noise when compared to an analog interface. The device 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 or proximity value. An interrupt is generated when the value of an ALS or proximity 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. Interrupt thresholds and persistence settings are configured independently for both ALS and proximity. Proximity detection requires only a single external IR LED. An internal LED driver can be configured to provide a constant current sink of 12.5 mA, 25 mA, 50 mA, or 100 mA of current. No external current limiting resistor is required. The number of proximity LED pulses can be programmed from 1 to 255 pulses. Each pulse has a 16-s period. This LED current, coupled with the programmable number of pulses, provides a 2000:1 contiguous dynamic range. Page 4 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Pin Assignments The TSL2771 pin assignments are described below: Pin Assignments Figure 3: Package FN Dual Flat No-Lead (Top View) VDD 1 6 SDA SCL 2 5 INT GND 3 4 LDR Figure 4: Terminal Functions Terminal Type Description Name No VDD 1 SCL 2 GND 3 LDR 4 O LED driver for proximity emitter -- up to 100 mA, open drain. INT 5 O Interrupt -- open drain (active low). SDA 6 I/O IC serial data I/O terminal -- serial data I/O for IC ams Datasheet [v1-00] 2016-Mar-22 Supply voltage. I IC serial clock input terminal -- clock signal for IC serial data. Power supply ground. All voltages are referenced to GND. Page 5 Document Feedback TSL2771 - Absolute Maximum Ratings Absolute Maximum Ratings 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. Figure 5: Absolute Maximum Ratings Over Operating Free-Air Temperature Range (unless otherwise noted) Symbol VDD(1) Parameter Min Max Units 3.8 V -0.5 3.8 V Supply voltage VO Digital output voltage range IO Digital output current -1 20 mA Storage temperature range -40 85 C Tstg ESDHBM ESD tolerance, human body model 2000 V Note(s): 1. All voltages are with respect to GND. Figure 6: Recommended Operating Conditions Symbol Parameter Min Nom Max Unit VDD Supply voltage 2.6 3 3.6 V TA Operating free-air temperature -30 70 C Page 6 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Absolute Maximum Ratings Figure 7: Operating Characteristics; VDD = 3 V, TA = 25C (unless otherwise noted) Symbol Parameter IDD Supply current INT, SDA output low voltage VOL ILEAK Leakage current, SDA, SCL, INT pins ILEAK Leakage current, LDR pin VIH SCL, SDA input high voltage VIL ams Datasheet [v1-00] 2016-Mar-22 SCL, SDA input low voltage Test Conditions Min Typ Max Active -- LDR pulse OFF 175 250 Wait mode 65 Sleep mode - no IC activity 2.5 Unit A 4 3 mA sink current 0 0.4 6 mA sink current 0 0.6 -5 5 V 10 TSL27711, TSL27715 0.7 VDD TSL27713, TSL27717 1.25 A A V TSL27711, TSL27715 0.3 VDD TSL27713, TSL27717 0.54 V Page 7 Document Feedback TSL2771 - Absolute Maximum Ratings Figure 8: ALS Characteristics; VDD = 3 V, TA = 25C, Gain = 16, AEN = 1 (unless otherwise noted) (1) (2) (3) Parameter Dark ADC count value ADC integration time step size Test Conditions Ee = 0, AGAIN = 120x, ATIME = 0xDB (100 ms) Channel Min Typ Max Unit CH0 0 1 5 CH1 0 1 5 2.58 2.72 2.9 ms 1 256 steps counts ATIME = 0xFF ADC Number of integration steps ADC counts per step ATIME = 0xFF 0 1024 counts ADC count value ATIME = 0xC0 0 65535 counts p = 625 nm, Ee ADC count value CH0 ATIME = 0xF6 (27 ms) (2) CH1 p = 850 nm, CH0 ATIME = 0xF6 (27 ms) (3) Irradiance responsivity Gain scaling, relative to 1x gain setting 6000 790 4000 CH1 p = 625 nm, ATIME 0xF6 (27 ms) (2) 5000 6000 2800 10.8 15.8 20.8 41 56 68 % p = 850 nm, ATIME 0xF6 (27 ms) (3) CH0 29.1 CH1 4.6 p = 850 nm, CH0 22.8 ATIME = 0xF6 (27 ms) (3) CH1 12.7 p = 625 nm, Re 5000 counts Ee = 219.7 W/cm2 ADC count value ratio: CH1/CH0 4000 = 171.6 W/cm2, ATIME = 0xF6 (27 ms) (2) counts/ (W/cm2) 8x -10 10 16x -10 10 120x -10 10 % Note(s): 1. Optical measurements are made using small-angle incident radiation from light-emitting diode optical sources. Visible 625 nm LEDs and infrared 850 nm LEDs are used for final product testing for compatibility with high-volume production. 2. The 625 nm irradiance Ee is supplied by an AlInGaP light-emitting diode with the following typical characteristics: peak wavelength p = 625 nm and spectral halfwidth 1/2 = 20 nm. 3. The 850 nm irradiance Ee is supplied by a GaAs light-emitting diode with the following typical characteristics: peak wavelength p = 850 nm and spectral halfwidth 1/2 = 42 nm. Page 8 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Absolute Maximum Ratings Figure 9: Proximity Characteristics; VDD = 3 V, TA = 25C, PEN = 1 (unless otherwise noted) Parameter Test Conditions IDD Supply current LDR pulse ON ADC conversion time step size PTIME = 0xFF Condition 2.58 PTIME = 0xFF IR LED pulse count pulse period PDRIVE=0 mA 1 256 steps 0 1023 counts 0 255 pulses 75 2.72 Unit ms Two or more pulses ISINK sink current @ 600 mV, LDR pin Max 2.9 LED pulse width -- LED ON time LED drive current Typ 3 ADC number of integration steps ADC counts per step Min 16 s 7.3 s 100 PDRIVE=1 50 PDRIVE=2 25 PDRIVE=3 12.5 125 mA Operating distance (1) 18 inches Note(s): 1. Proximity Operating Distance is dependent upon emitter properties and the reflective properties of the proximity surface. The nominal value shown uses an IR emitter with a peak wavelength of 850nm and a 20 half angle. The proximity surface used is a 90% reflective (white surface) 16 x 20-inch Kodak Gray Card. 60 mw/SR, 100 mA, 64 pulses, open view (no glass). Note: Greater distances are achievable with appropriate system considerations. Figure 10: Wait Characteristics; VDD = 3 V, TA = 25C, WEN = 1 (unless otherwise noted) Parameter Wait step size Wait number of integration steps ams Datasheet [v1-00] 2016-Mar-22 Test Conditions WTIME = 0xFF Channel Min Typ Max Unit 2.58 2.72 2.9 ms 256 steps 1 Page 9 Document Feedback TSL2771 - Absolute Maximum Ratings Figure 11: AC Electrical Characteristics; VDD = 3 V, TA = 25C, (unless otherwise noted) Symbol Parameter (1) f(SCL) Clock frequency (IC only) 0 t(BUF) Bus free time between start and stop condition 1.3 s t(HDSTA) Hold time after (repeated) start condition. After this period, the first clock is generated. 0.6 s t(SUSTA) Repeated start condition setup time 0.6 s t(SUSTO) Stop condition setup time 0.6 s t(HDDAT) Data hold time 0 s t(SUDAT) Data setup time 100 ns t(LOW) SCL clock low period 1.3 s t(HIGH) SCL clock high period 0.6 s tF Clock/data fall time 300 ns tR Clock/data rise time 300 ns Ci Input pin capacitance 10 pF Test Conditions Min Typ Max Unit 400 kHz Note(s): 1. Specified by design and characterization; not production tested. Page 10 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Absolute Maximum Ratings Parameter Measurement Information Figure 12: Timing Diagrams t(LOW) t(R) t(F) VIH SCL VIL t(HDSTA) t(BUF) t(HIGH) t(HDDAT) t(SUSTA) t(SUSTO) t(SUDAT) VIH SDA VIL P Stop Condition S S Start Condition Start P Stop t(LOWSEXT) SCLACK SCLACK t(LOWMEXT) t(LOWMEXT) t(LOWMEXT) SCL SDA ams Datasheet [v1-00] 2016-Mar-22 Page 11 Document Feedback TSL2771 - Typical Operating Characteristics Typical Operating Characteristics Figure 13: Spectral Responsivity 1 Ch 0 Normalized Responsivity 0.8 0.6 0.4 Ch 1 0.2 0 300 400 500 600 700 800 900 1000 1100 - Wavelength - nm Figure 14: Typical LDR Current vs. Voltage 160 140 100 mA LDR Current -- mA 120 100 80 50 mA 60 40 25 mA 20 12.5 mA 0 0 0.5 1 1.5 2 2.5 3 LDR Voltage - V Page 12 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Typical Operating Characteristics Figure 15: Normalized IDD vs.VDD and Temperature VDD and TEMPERATURE 110% 108% IDD Normalized @ 3 V, 25C 75C 106% 104% 50C 25C 102% 100% 0C 98% 96% 94% 92% 2.7 2.8 2.9 3 3.1 3.2 3.3 VDD -- V Figure 16: Normalized Responsivity vs. Angular Displacement 1.0 Optical Axis Normalized Responsivity 0.8 0.6 0.4 0.2 0 -90 ams Datasheet [v1-00] 2016-Mar-22 -Q +Q -60 -30 0 30 60 Q - Angular Displacement - 90 Page 13 Document Feedback TSL2771 - Principles Of Operation Principles Of Operation System State Machine The device provides control of ALS, proximity detection, and power management functionality through an internal state machine (Figure 17). After a power-on-reset, the device is in the sleep mode. As soon as the PON bit is set, the device will move to the start state. It will then continue through the Prox, Wait, and ALS states. If these states are enabled, the device will execute each function. If the PON bit is set to 0, the state machine will continue until all conversions are completed and then go into a low power sleep mode. Figure 17: Simplified State Diagram Sleep PON = 1 (r 0:b0) PON = 0 (r 0:b0) Start Prox ALS Wait Note(s): In this document, the nomenclature uses the bit field name in italics followed by the register number and bit number to allow the user to easily identify the register and bit that controls the function. For example, the power ON (PON) is in register 0, bit 0. This is represented as PON (r0:b0). Page 14 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Principles Of Operation Photodiodes Conventional silicon detectors respond strongly to infrared light, which the human eye does not see. This can lead to significant error when the infrared content of the ambient light is high (such as with incandescent lighting) due to the difference between the silicon detector response and the brightness perceived by the human eye. This problem is overcome through the use of two photodiodes. The Channel 0 photodiode, referred to as the CH0 channel, is sensitive to both visible and infrared light, while the Channel 1 photodiode, referred to as CH1, is sensitive primarily to infrared light. Two integrating ADCs convert the photodiode currents to digital outputs. The ADC digital outputs from the two channels are used in a formula to obtain a value that approximates the human eye response in units of lux. ALS Operation The ALS engine contains ALS gain control (AGAIN) and two integrating analog-to-digital converters (ADC) for the Channel 0 and Channel 1 photodiodes. The ALS integration time (ATIME) impacts both the resolution and the sensitivity of the ALS reading. Integration of both channels occurs simultaneously and upon completion of the conversion cycle, the results are transferred to the data registers (C0DATA and C1DATA). This data is also referred to as channel count. The transfers are double-buffered to ensure data integrity. Figure 18: ALS Operation ATIME(r 1) 2.72 ms to 696 ms CH0 ALS CH0 Data C0DATAH(r 0x15), C0DATA(r 0x14) ALS Control CH0 CH1 ADC CH1 Data C1DATAH(r 0x17), C1DATA(r 0x16) CH1 AGAIN(r 0x0F, b1:0) 1, 8, 16, 120 Gain ams Datasheet [v1-00] 2016-Mar-22 Page 15 Document Feedback The registers for programming the integration and wait times are a 2's compliment values. The actual time can be calculated as follows: ATIME = 256 - Integration Time / 2.72 ms Inversely, the time can be calculated from the register value as follows: Integration Time = 2.72 ms x (256 - ATIME) In order to reject 50/60-Hz ripple strongly present in fluorescent lighting, the integration time needs to be programmed in multiples of 10 / 8.3 ms or the half cycle time. Both frequencies can be rejected with a programmed value of 50 ms (ATIME = 0xED) or multiples of 50 ms (i.e. 100, 150, 200, 400, 600). The registers for programming the AGAIN hold a two-bit value representing a gain of 1x, 8x, 16x, or 120x. The gain, in terms of amount of gain, will be represented by the value AGAINx, i.e. AGAINx = 1, 8, 16, or 120. Lux Equation The lux calculation is a function of CH0 channel count (C0DATA), CH1 channel count (C1DATA), ALS gain (AGAINx), and ALS integration time in milliseconds (ATIME_ms). If an aperture, glass/plastic, or a light pipe attenuates the light equally across the spectrum (300 nm to 1100 nm), then a scaling factor referred to as glass attenuation (GA) can be used to compensate for attenuation. For a device in open air with no aperture or glass/plastic above the device, GA = 1. If it is not spectrally flat, then a custom lux equation with new coefficients should be generated. (See ams application note). Counts per Lux (CPL) needs to be calculated only when ATIME or AGAIN is changed, otherwise it remains a constant. The first segment of the equation (Lux1) covers fluorescent and incandescent light. The second segment (Lux2) covers dimmed incandescent light. The final lux is the maximum of Lux1, Lux2, or 0. CPL = (ATIME_ms x AGAINx) / (GA x 53) Lux1 = (C0DATA - 2 x C1DATA) / CPL Lux2 = (0.6 x C0DATA - C1DATA) / CPL Lux = MAX(Lux1, Lux2, 0) Page 16 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Principles Of Operation Proximity Detection Proximity sensing uses an external light source (generally an infrared emitter) to emit light, which is then viewed by the integrated light detector to measure the amount of reflected light when an object is in the light path (Figure 19). The amount of light detected from a reflected surface can then be used to determine an object's proximity to the sensor. Figure 19: Proximity Detection Surface Reflectivity (SR) Glass Attenuation (GA) Distance (D) IR LED Prox Sensor Background Energy (BGE) Optical Crosstalk (OC) The device has controls for the number of IR pulses (PPCOUNT), the integration time (PTIME), the LED drive current (PDRIVE), and the photodiode configuration (PDIODE) (Figure 20). The photodiode configuration can be set to CH1 diode (recommended), CH0 diode, or a combination of both diodes. At the end of the integration cycle, the results are latched into the proximity data (PDATA) register. Figure 20: Proximity Detection Operation IR LED VDD PDRIVE(r 0x0F, b7:6) PTIME(r 2) IR LED Constant Current Sink Prox Control Prox Integration CH0 ams Datasheet [v1-00] 2016-Mar-22 Prox ADC CH1 Prox Data PDATAH(r 0x019), PDATAL(r 0x018) PPCOUNT(r 0x0E) Page 17 Document Feedback TSL2771 - Principles Of Operation The LED drive current is controlled by a regulated current sink on the LDR pin. This feature eliminates the need to use a current limiting resistor to control LED current. The LED drive current can be configured for 12.5 mA, 25 mA, 50 mA, or 100 mA. For higher LED drive requirements, an external P type transistor can be used to control the LED current. The number of LED pulses can be programmed to any value between 1 and 255 pulses as needed. Increasing the number of LED pulses at a given current will increase the sensor sensitivity. Sensitivity grows by the square root of the number of pulses. Each pulse has a 16-s period. Figure 21: Proximity IR LED Waveform Add IR + Background Subtract Background LED On LED Off 16 ms IR LED Pulses The proximity integration time (PTIME) is the period of time that the internal ADC converts the analog signal to a digital count. It is recommend that this be set to a minimum of PTIME = 0xFF or 2.72 ms. The combination of LED power and number of pulses can be used to control the distance at which the sensor can detect proximity. Figure 22 shows an example of the distances covered with settings such that each curve covers 2x the distance. Counts up to 64 pulses provide a 16x range. Page 18 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Principles Of Operation Figure 22: Proximity ADC Count vs. Relative Distance 1000 25 mA, 1 Pulse 100 mA, 64 Pulses Proximity ADC Count 800 100 mA, 16 Pulses 600 400 100 mA, 4 Pulses 100 mA, 1 Pulse 200 0 1 2 4 8 16 Relative Distance Interrupts The interrupt feature simplifies and improves system efficiency by eliminating the need to poll the sensor for light intensity or proximity values outside of a user-defined range. While the interrupt function is always enabled and it's status is available in the status register (0x13), the output of the interrupt state can be enabled using the proximity interrupt enable (PIEN) or ALS interrupt enable (AIEN) fields in the enable register (0x00). Four 16-bit interrupt threshold registers allow the user to set limits below and above a desired light level and proximity range. An interrupt can be generated when the ALS CH0 data (C0DATA) falls outside of the desired light level range, as determined by the values in the ALS interrupt low threshold registers (AILTx) and ALS interrupt high threshold registers (AIHTx). Likewise, an out-of-range proximity interrupt can be generated when the proximity data (PDATA) falls below the proximity interrupt low threshold (PILTx) or exceeds the proximity interrupt high threshold (PIHTx). It is important to note that the low threshold value must be less than the high threshold value for proper operation. To further control when an interrupt occurs, the device provides a persistence filter. The persistence filter allows the user to specify the number of consecutive out-of-range ALS or proximity occurrences before an interrupt is generated. The persistence register (0x0C) allows the user to set the ALS persistence (APERS) and the proximity persistence (PPERS) values. See the persistence register for details on the persistence filter values. Once the persistence filter generates ams Datasheet [v1-00] 2016-Mar-22 Page 19 Document Feedback TSL2771 - Principles Of Operation an interrupt, it will continue until a special function interrupt clear command is received (seeCommand Register). Figure 23: Programmable Interrupt Prox Integration Prox ADC PIHTH(r 0x0B), PIHTL(r 0x0A) PPERS(r 0x0C, b7:4) Upper Limit Prox Persistence Prox Data Lower Limit PILTH(r 09), PILTL(r 08) AIHTH(r 07), AIHTL(r 06) CH1 Upper Limit CH0 ADC APERS(r 0x0C, b3:0) ALS Persistence CH0 Data Lower Limit CH0 AILTH(r 05), AILTL(r 04) Page 20 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Principles Of Operation State Diagram Figure 24 shows a more detailed flow for the state machine. The device starts in the sleep mode. The PON bit is written to enable the device. A 2.72-ms delay will occur before entering the start state. If the PEN bit is set, the state machine will step through the proximity states of proximity accumulate and then proximity ADC conversion. As soon as the conversion is complete, the state machine will move to the following state. If the WEN bit is set, the state machine will then cycle through the wait state. If the WLONG bit is set, the wait cycles are extended by 12x over normal operation. When the wait counter terminates, the state machine will step to the ALS state. The AEN should always be set, even in proximity-only operation. In this case, a minimum of 1 integration time step should be programmed. The ALS state machine will continue until it reaches the terminal count at which point the data will be latched in the ALS register and the interrupt set, if enabled. Figure 24: Expanded State Diagram Up to 255 LED Pulses Pulse Frequency: 62.5 kHz Time: 16 ms - 4.2 ms Maximum 4.2ms Up to 256 steps Step: 2.72 ms Time: 2.72 ms - 696 ms 120 Hz Minimum - 8 ms 100 Hz Minimum - 10 ms Sleep 2.72 ms Prox Delay PON = 1 PON = 0 Start Prox Accum ALS PEN = 1 Prox Check ALS Check Prox ADC ALS Delay AEN = 1 Counts up to 256 steps Step: 2.72 ms Time: 2.72 mS - 696 ms Recommended - 2.72 ms 1024 Counts Wait Check Time: 2.72 ms WEN = 1 Wait WLONG = 0 Counts up to 256 steps Step: 2.72 ms Time: 2.72 ms - 696 ms Minimum - 2.72 ms ams Datasheet [v1-00] 2016-Mar-22 WLONG = 1 Counts up to 256 steps Step: 32.64 ms Time: 32.64 ms - 8.35 s Minimum - 32.64 ms Page 21 Document Feedback TSL2771 - Principles Of Operation Power Management Power consumption can be controlled through the use of the wait state timing because the wait state consumes only 65 A of power. Figure 25 shows an example of using the power management feature to achieve an average power consumption of 155 A current with four 100-mA pulses of proximity detection and 50 ms of ALS detection. Figure 25: Power Consumption Calculations 4 IR LED Pulses Prox Accum 64 ms (32 ms LED On Time) Prox ADC 2.72 ms Example: 100 ms Cycle TIme WAIT ALS 47 ms 50 ms State Duration (ms) Current (mA) Prox Accum (LED On) Prox ADC Wait ALS 0.064 (0.032) 2.7 47 50 100.0 0.175 0.065 0.175 Avg = ((0.032 100) + (2.72 0.175) + (47 0.065) + (50 0.175)) / 100 = 155 mA Page 22 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Principles Of Operation IC Protocol Interface and control are accomplished through an IC 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 IC addressing protocol. The IC standard provides for three types of bus transaction: read, write, and a combined protocol (Figure 26). 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. The IC bus protocol was developed by Philips (now NXP). For a complete description of the IC protocol, please review the NXP IC design specification at http://www.i2c-bus.org/references/. A N P R S S W ... ams Datasheet [v1-00] 2016-Mar-22 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 Page 23 Document Feedback TSL2771 - Principles Of Operation Figure 26: IC Protocols 1 7 1 1 S Slave Address W A 8 Command Code 1 8 1 A Data Byte A 8 1 1 ... P I2C Write Protocol 1 S 7 Slave Address 1 R 1 A 8 1 Data A Data A 1 ... P I2C Read Protocol 1 7 1 1 8 1 1 7 1 1 S Slave Address W A Command Code A S Slave Address R A 8 Data 1 8 1 A Data A 1 ... P I2C Read Protocol -- Combined Format Page 24 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Register Set Register Set The TSL2771 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. The register set is summarized in Figure 27. Figure 27: Register Address Address Register Name R/W -- COMMAND W 0x00 ENABLE 0x01 Register Function Reset Value Specifies register address 0x00 R/W Enables states and interrupts 0x00 ATIME R/W ALS ADC time 0xFF 0x02 PTIME R/W Proximity ADC time 0xFF 0x03 WTIME R/W Wait time 0xFF 0x04 AILTL R/W ALS interrupt low threshold low byte 0x00 0x05 AILTH R/W ALS interrupt low threshold high byte 0x00 0x06 AIHTL R/W ALS interrupt high threshold low byte 0x00 0x07 AIHTH R/W ALS interrupt high threshold high byte 0x00 0x08 PILTL R/W Proximity interrupt low threshold low byte 0x00 0x09 PILTH R/W Proximity interrupt low threshold high byte 0x00 0x0A PIHTL R/W Proximity interrupt high threshold low byte 0x00 0x0B PIHTH R/W Proximity interrupt high threshold high byte 0x00 0x0C PERS R/W Interrupt persistence filters 0x00 0x0D CONFIG R/W Configuration 0x00 0x0E PPCOUNT R/W Proximity pulse count 0x00 0x0F CONTROL R/W Control register 0x00 0x12 ID R Device ID 0x13 STATUS R Device status 0x00 0x14 C0DATA R CH0 ADC low data register 0x00 0x15 C0DATAH R CH0 ADC high data register 0x00 0x16 C1DATA R CH1 ADC low data register 0x00 0x17 C1DATAH R CH1 ADC high data register 0x00 ams Datasheet [v1-00] 2016-Mar-22 ID Page 25 Document Feedback TSL2771 - Register Set Address Register Name R/W Register Function Reset Value 0x18 PDATA R Proximity ADC low data register 0x00 0x19 PDATAH R Proximity ADC high data register 0x00 The mechanics of accessing a specific register depends on the specific protocol used. See the section on IC 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. Page 26 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Register Set Command Register The command registers specifies the address of the target register for future read and write operations. Figure 28: Command Register 7 6 COMMAND 5 4 3 2 TYPE Field Bits COMMAND 7 TYPE 6:5 1 0 ADD Description Select Command Register. Must write as 1 when addressing COMMAND register. Selects type of transaction to follow in subsequent data transfers: FIELD VALUE DESCRIPTION 00 Repeated byte protocol transaction 01 Auto-increment protocol transaction 10 Reserved -- Do not use 11 Special function -- See description below Transaction type 00 will repeatedly read the same register with each data access. Transaction type 01 will provide an auto-increment function to read successive register bytes. ADD 4:0 Address register/special function field. Depending on the transaction type, see above, this field either specifies a special function command or selects the specific control-status-register for the following write and read transactions. The field values listed below apply only to special function commands: FIELD VALUE DESCRIPTION 00000 Normal - no action 00101 Proximity interrupt clear 00110 ALS interrupt clear 00111 Proximity and ALS interrupt clear other Reserved -- Do not write ALS/Proximity Interrupt Clear clears any pending ALS/Proximity interrupt. This special function is self clearing. ams Datasheet [v1-00] 2016-Mar-22 Page 27 Document Feedback TSL2771 - Register Set Enable Register (0x00) The ENABLE register is used to power the device ON/OFF, enable functions, and interrupts. Figure 29: Enable Register 7 6 Reserved 5 4 3 2 1 0 PIEN AIEN WEN PEN AEN PON Field Bits Description Reserved 7:6 PIEN 5 Proximity interrupt mask. When asserted, permits proximity interrupts to be generated. AIEN 4 ALS interrupt mask. When asserted, permits ALS interrupts to be generated. WEN 3 Wait Enable. This bit activates the wait feature. Writing a 1 activates the wait timer. Writing a 0 disables the wait timer. PEN 2 Proximity enable. This bit activates the proximity function. Writing a 1 enables proximity. Writing a 0 disables proximity. AEN 1 ALS Enable. This bit actives the two channel ADC. Writing a 1 activates the ALS. Writing a 0 disables the ALS. PON(1)(2) 0 Power ON. This bit activates the internal oscillator to permit the timers and ADC channels to operate. Writing a 1 activates the oscillator. Writing a 0 disables the oscillator. Reserved. Write as 0. Note(s): 1. See Power Management section for more information. 2. A minimum interval of 2.72 ms must pass after PON is asserted before either a proximity or ALS can be initiated. This required time is enforced by the hardware in cases where the firmware does not provide it. Page 28 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Register Set ALS Timing Register (0x01) The ALS timing register controls the internal integration time of the ALS channel ADCs in 2.72 ms increments. Figure 30: ALS Timing Register Field Bits ATIME 7:0 Description VALUE INTEG_CYCLES TIME MAX COUNT 0xFF 1 2.72 ms 1024 0xF6 10 27.2 ms 10240 0xDB 37 101 ms 37888 0xC0 64 174 ms 65535 0x00 256 696 ms 65535 Proximity Time Control Register (0x02) The proximity timing register controls the integration time of the proximity ADC in 2.72 ms increments. It is recommended that this register be programmed to a value of 0xFF (1 integration cycle). Figure 31: Proximity Time Control Register Field Bits PTIME 7:0 ams Datasheet [v1-00] 2016-Mar-22 Description VALUE INTEG_CYCLES TIME MAX COUNT 0xFF 1 2.72 ms 1023 Page 29 Document Feedback TSL2771 - Register Set Wait Time Register (0x03) Wait time is set 2.72 ms increments unless the WLONG bit is asserted in which case the wait times are 12x longer. WTIME is programmed as a 2's complement number. Figure 32: Wait Time Register Field Bits WTIME 7:0 Description REGISTER VALUE WAIT TIME TIME (WLONG = 0) TIME (WLONG = 1) 0xFF 1 2.72 ms 0.032 s 0xB6 74 201 ms 2.4 s 0x00 256 696 ms 8.3 s Note(s): 1. The Proximity Wait Time Register should be configured before PEN and/or AEN is/are asserted. ALS Interrupt Threshold Registers (0x04 - 0x07) The ALS interrupt threshold registers provides the values to be used as the high and low trigger points for the comparison function for interrupt generation. If C0DATA crosses below the low threshold specified, or above the higher threshold, an interrupt is asserted on the interrupt pin. Figure 33: ALS Interrupt Threshold Register Register Address Bits Description AILTL 0x04 7:0 ALS low threshold lower byte AILTH 0x05 7:0 ALS low threshold upper byte AIHTL 0x06 7:0 ALS high threshold lower byte AIHTH 0x07 7:0 ALS high threshold upper byte Page 30 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Register Set Proximity Interrupt Threshold Registers (0x08 - 0x0B) The proximity interrupt threshold registers provide the values to be used as the high and low trigger points for the comparison function for interrupt generation. If the value generated by proximity channel crosses below the lower threshold specified, or above the higher threshold, an interrupt is signaled to the host processor. Figure 34: Proximity Interrupt Threshold Registers Register Address Bits Description PILTL 0x08 7:0 Proximity low threshold lower byte PILTH 0x09 7:0 Proximity low threshold upper byte PIHTL 0x0A 7:0 Proximity high threshold lower byte PIHTH 0x0B 7:0 Proximity high threshold upper byte ams Datasheet [v1-00] 2016-Mar-22 Page 31 Document Feedback TSL2771 - Register Set Persistence Register (0x0C) The persistence register controls the filtering interrupt capabilities of the device. Configurable filtering is provided to allow interrupts to be generated after each ADC integration cycle or if the ADC integration has produced a result that is outside of the values specified by threshold register for some specified amount of time. Separate filtering is provided for proximity and ALS functions. ALS interrupts are generated using C0DATA. Figure 35: Persistence Register 7 6 5 4 3 2 PPERS Field Bits PPERS 7:4 Page 32 Document Feedback 1 0 APERS Description Proximity interrupt persistence. Controls rate of proximity interrupt to the host processor FIELD VALUE MEANING INTERRUPT PERSISTENCE FUNCTION 0000 ----- Every proximity cycle generates an interrupt 0001 1 1 proximity value out of range 0010 2 2 consecutive proximity values out of range ... ... ... 1111 15 15 consecutive proximity values out of range ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Register Set Field Bits APERS 3:0 ams Datasheet [v1-00] 2016-Mar-22 Description Interrupt persistence. Controls rate of interrupt to the host processor. FIELD VALUE MEANING INTERRUPT PERSISTENCE FUNCTION 0000 Every Every proximity cycle generates an interrupt 0001 1 1 value outside of threshold range 0010 2 2 consecutive values out of range 0011 3 3 consecutive values out of range 0100 5 5 consecutive values out of range 0101 10 10 consecutive values out of range 0110 15 15 consecutive values out of range 0111 20 20 consecutive values out of range 1000 25 25 consecutive values out of range 1001 30 30 consecutive values out of range 1010 35 35 consecutive values out of range 1011 40 40 consecutive values out of range 1100 45 45 consecutive values out of range 1101 50 50 consecutive values out of range 1110 55 55 consecutive values out of range 1111 60 60 consecutive values out of range Page 33 Document Feedback TSL2771 - Register Set Configuration Register (0x0D) The configuration register sets the wait long time. Figure 36: Configuration Register 7 6 5 4 3 2 Reserved 1 0 WLONG Reserved Field Bits Description Reserved 7:2 WLONG 1 Wait Long. When asserted, the wait cycles are increased by a factor 12x from that programmed in the WTIME register. Reserved 0 Reserved. Write as 0. Reserved. Write as 0. Proximity Pulse Count Register (0x0E) The proximity pulse count register sets the number of proximity pulses that will be transmitted. When proximity detection is enabled, a proximity detect cycle occurs after each ALS cycle. PPULSE defines the number of pulses to be transmitted at a 62.5-kHz rate. Note(s): The ATIME register will be used to time the interval between proximity detection events even if the ALS function is disabled. Figure 37: Proximity Pulse Count Register 7 6 5 4 3 2 1 0 PPULSE Field Bits PPULSE 7:0 Page 34 Document Feedback Description Proximity Pulse Count. Specifies the number of proximity pulses to be generated. ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Register Set Control Register (0x0F) The Control register provides eight bits of miscellaneous control to the analog block. These bits typically control functions such as gain settings and/or diode selection. Figure 38: Control Register 7 6 PDRIVE 5 4 3 PDIODE Field Bits PDRIVE 7:6 5:4 0 AGAIN Description LED Drive Strength. LED STRENGTH 00 100 mA 01 50 mA 10 25 mA 11 12.5 mA Proximity Diode Select. FIELD VALUE DIODE SELECTION 00 Reserved 01 Proximity uses the CH0 diode 10 Proximity uses the CH1 diode 11 Proximity uses both diodes Reserved 3:2 Reserved. Write bits as zero (0:0) AGAIN 1:0 ALS Gain Control. FIELD VALUE ams Datasheet [v1-00] 2016-Mar-22 1 Reserved FIELD VALUE PDIODE 2 ALS GAIN VALUE 00 1x gain 01 8x gain 10 16x gain 11 120x gain Page 35 Document Feedback TSL2771 - Register Set ID Register (0x12) The ID Register provides the value for the part number. The ID register is a read-only register. Figure 39: ID Register 7 6 5 4 3 2 1 0 ID Field Bits ID 7:0 Description 0x00 = TSL27711 & TSL27715 Part number identification 0x09 = TSL27713 & TSL27717 Status Register (0x13) The Status Register provides the internal status of the device. This register is read only. Figure 40: Status Register 7 6 Reserved 5 4 PINT AINT 3 2 Reserved 1 0 AVALID Field Bit Reserved 7:6 PINT 5 Proximity Interrupt. Indicates that the device is asserting a proximity interrupt. AINT 4 ALS Interrupt. Indicates that the device is asserting an ALS interrupt. Reserved 3:1 AVALID 0 Page 36 Document Feedback Description Reserved. Reserved. ALS Valid. Indicates that the ALS channel has completed an integration cycle. ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Register Set ADC Channel Data Registers (0x14 - 0x17) ALS data is stored as two 16-bit values. To ensure the data is read correctly, a two-byte read IC transaction should be used with auto increment protocol bits set in the command register. With this operation, when the lower byte register is read, the upper eight bits are stored in a shadow register, which is read by a subsequent read to the upper byte. The upper register will read the correct value even if additional ADC integration cycles end between the reading of the lower and upper registers. Figure 41: ADC Channel Data Registers Register Address Bits Description C0DATA 0x14 7:0 ALS CH0 data low byte C0DATAH 0x15 7:0 ALS CH0 data high byte C1DATA 0x16 7:0 ALS CH1 data low byte C1DATAH 0x17 7:0 ALS CH1 data high byte Proximity Data Registers (0x18 - 0x19) Proximity data is stored as a 16-bit value. To ensure the data is read correctly, a two-byte read IC transaction should be utilized with auto increment protocol bits set in the command register. With this operation, when the lower byte register is read, the upper eight bits are stored into a shadow register, which is read by a subsequent read to the upper byte. The upper register will read the correct value even if the next ADC cycle ends between the reading of the lower and upper registers. Figure 42: PDATA Registers Register Address Bits Description PDATAL 0x18 7:0 Proximity data low byte PDATAH 0x19 7:0 Proximity data high byte ams Datasheet [v1-00] 2016-Mar-22 Page 37 Document Feedback TSL2771 - Application Information Hardware Application Information Hardware LED Driver Pin with Proximity Detection In a proximity sensing system, the IR LED can be pulsed by the TSL2771 with more than 100 mA of rapidly switching current, therefore, a few design considerations must be kept in mind to get the best performance. The key goal is to reduce the power supply noise coupled back into the device during the LED pulses. The first recommendation is to use two power supplies; one for the device V DD and the other for the IR LED. In many systems, there is a quiet analog supply and a noisy digital supply. By connecting the quiet supply to the V DD pin and the noisy supply to the LED, the key goal can be meet. Place a 1-F low-ESR decoupling capacitor as close as possible to the V DD pin and another at the LED anode, and a 22-F capacitor at the output of the LED voltage regulator to supply the 100-mA current surge. Figure 43: Proximity Sensing Using Separate Power Supplies VBUS Voltage Regulator VDD 1 mF C* RP GND TSL2771 RP RPI INT SCL Voltage Regulator LDR 22 mF 1 mF SDA IR LED * Cap Value Per Regulator Manufacturer Recommendation Page 38 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Application Information Hardware If it is not possible to provide two separate power supplies, the device can be operated from a single supply. A 22- resistor in series with the V DD supply line and a 1-F low ESR capacitor effectively filter any power supply noise. The previous capacitor placement considerations apply. Figure 44: Proximity Sensing Using Single Power Supply VBUS 22 W Voltage Regulator VDD 22 mF 1 mF RP GND TSL2771 RP RPI INT SCL LDR 1 mF SDA IR LED * Cap Value Per Regulator Manufacturer Recommendation V BUS in the above figures refers to the IC bus voltage which is either V DD or 1.8 V. Be sure to apply the specified IC bus voltage shown in the Ordering Information for the specific device being used. The IC signals and the Interrupt are open-drain outputs and require pull-up resistors. The pull-up resistor (R P) value is a function of the IC bus speed, the IC bus voltage, and the capacitive load. The ams EVM running at 400 kbps, uses 1.5-k resistors. A 10-k pull-up resistor (RPI) can be used for the interrupt line. ams Datasheet [v1-00] 2016-Mar-22 Page 39 Document Feedback TSL2771 - Application Information Hardware PCB Pad Layouts Suggested PCB pad layout guidelines for the Dual Flat No-Lead (FN) surface mount package are shown in Figure 45. Note(s): Pads can be extended further if hand soldering is needed. Figure 45: Suggested FN Package PCB Layout 2500 1000 1000 400 650 1700 650 400 Note(s): 1. All linear dimensions are in micrometers. 2. This drawing is subject to change without notice. Page 40 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Mechanical Data Mechanical Data Figure 46: Package FN -- Dual Flat No-Lead Packaging Configuration PACKAGE FN Dual Flat No-Lead TOP VIEW 466 10 PIN OUT TOP VIEW PIN 1 466 10 2000 100 2000 100 VDD 1 6 SDA SCL 2 5 INT GND 3 4 LDR Photodiode Array Area END VIEW SIDE VIEW 295 Nominal 650 50 203 8 650 300 50 BOTTOM VIEW CL of Photodiode Array Area 2 2 (Note B) CL of Solder Contacts 20 Nominal 140 Nominal CL of Solder Contacts 2 2 CL of Photodiode Array Area (Note B) RoHS PIN 1 750 150 Pb Green Lead Free Note(s): 1. All linear dimensions are in micrometers. Dimension tolerance is 20m unless otherwise noted. 2. The die is centered within the package within a tolerance of 3 mils. 3. Package top surface is molded with an electrically nonconductive clear plastic compound having an index of refraction of 1.55. 4. Contact finish is copper alloy A194 with pre-plated NiPdAu lead finish. 5. This package contains no lead (Pb). 6. This drawing is subject to change without notice. ams Datasheet [v1-00] 2016-Mar-22 Page 41 Document Feedback TSL2771 - Mechanical Data Figure 47: Package FN Carrier Tape TOP VIEW 2.00 0.05 1.75 4.00 8.00 1.50 4.00 B + 0.30 - 0.10 3.50 0.05 1.00 0.25 A B A DETAIL A DETAIL B 5 Max 5 Max 2.18 0.05 0.254 0.02 Ao 0.83 0.05 Ko 2.18 0.05 Bo Note(s): 1. All linear dimensions are in millimeters. Dimension tolerance is 0.10 mm unless otherwise noted. 2. The dimensions on this drawing are for illustrative purposes only. Dimensions of an actual carrier may vary slightly. 3. Symbols on drawing Ao, Bo, and Ko are defined in ANSI EIA Standard 481-B 2001. 4. Each reel is 178 millimeters in diameter and contains 3500 parts. 5. ams packaging tape and reel conform to the requirements of EIA Standard 481-B. 6. In accordance with EIA standard, device pin 1 is located next to the sprocket holes in the tape. 7. This drawing is subject to change without notice. Page 42 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Manufacturing Information The FN package has been tested and has demonstrated an ability to be reflow soldered to a PCB substrate. Manufacturing Information 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. Figure 48: Soldier Reflow Profile Parameter Reference Device Average temperature gradient in preheating 2.5C/s tsoak 2 to 3 minutes Time above 217C (T1) t1 Max 60 s Time above 230C (T2) t2 Max 50 s Time above Tpeak -10C (T3) t3 Max 10 s Peak temperature in reflow Tpeak 260C Soak time Temperature gradient in cooling Max -5C/s Figure 49: Solder Reflow Profile Graph Tpeak Not to scale -- for reference o T3 T2 Temperature (C) T1 Time (s) t3 t2 tsoak t1 Note(s): 1. Note to scale - for reference only. ams Datasheet [v1-00] 2016-Mar-22 Page 43 Document Feedback TSL2771 - 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: 5C to 50C * 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 50C for 12 hours. Page 44 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Ordering & Contact Information Ordering & Contact Information Figure 50: Ordering Information Ordering Code Device Address Package - Leads Interface Description TSL27711FN TSL27711 0x39 FN-6 IC Vbus = VDD Interface TSL27713FN TSL27713 0x39 FN-6 IC Vbus = 1.8 V Interface TSL27715FN TSL27715 (1) 0x29 FN-6 IC Vbus = VDD Interface TSL27717FN TSL27717 (1) 0x29 FN-6 IC Vbus = 1.8 V Interface Note(s): 1. Contact ams for availability. Buy our products or get free samples online at: www.ams.com/ICdirect Technical Support is available at: www.ams.com/Technical-Support Provide feedback about this document at: www.ams.com/Document-Feedback For further information and requests, e-mail us at: ams_sales@ams.com For sales offices, distributors and representatives, please visit: www.ams.com/contact Headquarters ams AG Tobelbaderstrasse 30 8141 Premstaetten Austria, Europe Tel: +43 (0) 3136 500 0 Website: www.ams.com ams Datasheet [v1-00] 2016-Mar-22 Page 45 Document Feedback TSL2771 - RoHS Compliant & ams Green Statement RoHS Compliant & ams Green Statement RoHS: The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes. ams Green (RoHS compliant and no Sb/Br): ams Green defines that in addition to RoHS compliance, our products are 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: The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG 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. ams AG 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. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Page 46 Document Feedback ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Copyrights & Disclaimer Copyrights & Disclaimer Copyright ams AG, Tobelbader Strasse 30, 8141 Premstaetten, Austria-Europe. Trademarks Registered. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This product is provided by ams AG "AS IS" and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services. ams Datasheet [v1-00] 2016-Mar-22 Page 47 Document Feedback TSL2771 - Document Status Document Status Document Status Product Preview Preliminary Datasheet Datasheet Datasheet (discontinued) Page 48 Document Feedback Product Status Definition Pre-Development Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice Pre-Production Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice Production Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade Discontinued Information in this datasheet is based on products which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade, but these products have been superseded and should not be used for new designs ams Datasheet [v1-00] 2016-Mar-22 TSL2771 - Revision Information Revision Information Changes from 100B (2011-Feb) to current revision 1-00 (2016-Mar-22) Page Content of TAOS datasheet was updated to latest ams design Note(s): 1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision 2. Correction of typographical errors is not explicitly mentioned. ams Datasheet [v1-00] 2016-Mar-22 Page 49 Document Feedback TSL2771 - Content Guide Content Guide Page 50 Document Feedback 1 2 2 3 General Description Key Benefits & Features Applications Functional Block Diagram 4 5 Detailed Description Pin Assignments 6 11 Absolute Maximum Ratings Parameter Measurement Information 12 Typical Operating Characteristics 14 14 15 15 16 17 19 21 22 23 Principles Of Operation System State Machine Photodiodes ALS Operation Lux Equation Proximity Detection Interrupts State Diagram Power Management IC Protocol 25 27 28 29 29 30 30 31 32 34 34 35 36 36 37 37 Register Set Command Register Enable Register (0x00) ALS Timing Register (0x01) Proximity Time Control Register (0x02) Wait Time Register (0x03) ALS Interrupt Threshold Registers (0x04 - 0x07) Proximity Interrupt Threshold Registers (0x08 - 0x0B) Persistence Register (0x0C) Configuration Register (0x0D) Proximity Pulse Count Register (0x0E) Control Register (0x0F) ID Register (0x12) Status Register (0x13) ADC Channel Data Registers (0x14 - 0x17) Proximity Data Registers (0x18 - 0x19) 38 38 40 Application Information Hardware LED Driver Pin with Proximity Detection PCB Pad Layouts 41 43 44 Mechanical Data Manufacturing Information Moisture Sensitivity 45 46 47 48 49 Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information ams Datasheet [v1-00] 2016-Mar-22