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datasheet - apr. 2013 - ams163.5 TSL2591 C 1 TSL2591 datasheet - apr. 2013 - ams163.5 the TSL2591 is a very-high sensitivity light-to-digital converter that transforms light intensity into a digital signal output capable of direct i 2 c 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. figure TSL2591 C 1: key benefits and features 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 a sleep state user selectable sleep mode i 2 c fast mode compatible interface ? data rates up to 400 kbit/s ? input voltage levels compatible with 3.0v bus general description
TSL2591 C 2 datasheet - apr. 2013 - ams163.5 figure TSL2591 C 2: block diagram 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 ma intained. after the transfer, the device automatically begins the next integration cycle. communication with the device is accomplished through a standard, two-wire i 2 c 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. detailed description
datasheet - apr. 2013 - ams163.5 TSL2591 C 3 t he TSL2591 pin assignments are described below. figure TSL2591 C 3: pin diagram figure TSL2591 C 4: pin description package fn dual flat no-lead (top view): package drawing is not to scale. pin number pin name description 1scl i 2 c serial clock input terminal 2 int interrupt open drain output (active low). 3 gnd power supply ground. all voltages are referenced to gnd. 4 nc no connect do not connect. 5 v dd supply voltage 6sda i 2 c serial data i/o terminal pin assignment scl 1 int 2 gnd 3 6 sda 5 v dd 4 nc
TSL2591 C 4 datasheet - apr. 2013 - ams163.5 figure TSL2591 C 5: ordering information *contact factory for availability. notes: 1. all products are rohs compliant and ams green. 2. buy our products or get free samples online at www.ams.com/icdirect 3. technical support is available at www.ams.com/technical-support 4. for further information and requests, email us at sales@ams.com 5. (or) find your local distributor at www.ams.com/distributor 6. please contact ams for alternate address device availability. 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 operating conditions is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. figure TSL2591 C 6: absolute maximum ratings ordering code address interface delivery form TSL25911fn 0x29 i 2 c v bus = v dd interface odfn-6 TSL25913fn* 0x29 i 2 c v bus = 1.8v odfn-6 parameter min max units comments supply voltage, v dd 3.8 v all voltages are with respect to gnd input terminal voltage -0.5 3.8 v output terminal voltage -0.5 3.8 v output terminal current -1 20 ma storage temperature range, t stg -40 85 oc esd tolerance, human body model 2000 v ordering information absolute maximum ratings
datasheet - apr. 2013 - ams163.5 TSL2591 C 5 all limits are guaranteed. the parameters with min and max values are guaranteed with production tests or sqc (statistical quality control) methods. figure TSL2591 C 7: recommended operating conditions figure TSL2591 C 8: operating characteristics, v dd =3v, t a =25oc (unless otherwise noted) symbol parameter min typ max units v dd supply voltage 2.7 3 3.6 v t a operating free-air temperature -30 70 oc symbol parameter conditions min typ max units i dd supply current active sleep state - no i 2 c activity 275 2.3 325 4 a v ol int, sda output low voltage 3ma sink current 6ma sink current 0 0 0.4 0.6 v i leak leakage current, sda, scl, int pins -5 5 a v ih scl, sda input high voltage 0.7 v dd v v il scl, sda input low voltage 0.3 v dd v electrical characteristics
TSL2591 C 6 datasheet - apr. 2013 - ams163.5 figure TSL2591 C 9: als characteristics, v dd =3v, t a =25oc, again = max, aen=1, (unless otherwise noted) (notes 1, 2, 3), notes: 1. optical measurements are made using small-angle incident ra diation 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 ligh t-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 wavelengt h p = 850 nm and spectral halfwidth ?? = 42 nm. 4. parameter ensured by design and is not 100% tested. parameter conditions channel min typ max units dark adc count value e e = 0, atime=000b (100ms) ch0 ch1 0 0 25 25 counts adc integration time step size atime = 000b (100ms) 95 101 108 ms adc number of integration steps (note 4) 16steps adc counts per step atime = 000b (100ms) 0 37888 counts adc count value atime = 101b (600ms) 0 65535 counts adc count value white light (note 2) e e = 4.98 w/cm 2 atime = 000b (100 ms) ch0 ch1 25500 30000 4996 34500 counts p = 850 nm (note 3) e e = 5.62 w/cm 2 , atime = 000b (100 ms) ch0 ch1 25500 30000 19522 34500 counts adc count value ratio: ch1/ch0 white light (note 2) 0.116 0.166 0.216 p = 850 nm (note 3) 0.456 0.652 0.848 r e irradiance responsivity white light (note 2) atime = 000b (100 ms) ch0 ch1 6024 1003 counts/ (w/cm 2 ) p = 850 nm (note 3) atime = 000b (100 ms) ch0 ch1 5338 3474 noise (note 4) white light (note 2) e e = 4.98 w/cm 2 atime = 000b (100 ms) ch0 1 2 1 standard deviation gain scaling, relative to 1 gain setting again = low again = med again = high again = max 1 25 428 9876
datasheet - apr. 2013 - ams163.5 TSL2591 C 7 the timing characteristics of TSL2591 are given below. figure TSL2591 C 10: ac electrical characteristics, v dd = 3 v, t a = 25oc (unless otherwise noted) ? specified by design and characterization; not production tested. figure TSL2591 C 11: parameter measurement information parameter ? description min typ max units f (scl) clock frequency (i 2 c only) 0 400 khz 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 t f clock/data fall time 300 ns t r clock/data rise time 300 ns c i input pin capacitance 10 pf timing characteristics timing diagrams
TSL2591 C 8 datasheet - apr. 2013 - ams163.5 figure TSL2591 C 12: spectral responsivity figure TSL2591 C 13: white normalized responsivity vs. angular displacement spectral responsivity: two channel response allows for tunable illuminance (lux) calculation regardless of transmissivity of glass. white led angular response: near cosine angular response for broadband white light sources. typical operating characteristics ch0 ch1 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 300 400 500 600 700 800 900 1000 1100 - wavelength - nm normalized responsivity ch0 ch1 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% -90-75-60-45-30-150 153045607590 incedent angle - o response - normalized to 0o
datasheet - apr. 2013 - ams163.5 TSL2591 C 9 figure TSL2591 C 14: normalized i dd vs. v dd and temperature figure TSL2591 C 15: response to white led vs. temperature i dd vs. v dd vs. temp: effect of supply voltage and temperature on active current. white led response v temp: effect of temperature on the device response for a broadband white light source. 5c 25c 50c 75c 0.9 0.95 1 1.05 1.1 1.15 1.2 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 v dd - source voltage - v idd - active current normalized @ 3v, 25oc ch 0 ch 1 90% 95% 100% 105% 110% 0 10203040506070 temperature - oc response - normalized to 25oc
TSL2591 C 10 datasheet - apr. 2013 - ams163.5 the device is controlled and monitored by registers accessed through the i 2 c 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 TSL2591 - 16. figure TSL2591 C 16: register description note: jgs-stopped here. address register name r/w register function reset value -- command w specifies register address 0x00 0x00 enable r/w enables states and interrupts 0x00 0x01 config r/w als gain and integration time configuration 0x00 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 npailtl r/w no persist als interrupt low threshold low byte 0x00 0x09 npailth r/w no persist als interrupt low threshold high byte 0x00 0x0a npaihtl r/w no persist als interrupt high threshold low byte 0x00 0x0b npaihth r/w no persist als interrupt high threshold high byte 0x00 0x0c persist r/w interrupt persistence filter 0x00 0x11 pid r package id -- 0x12 id r device id id 0x13 status r device status 0x00 0x14 c0datal r ch0 adc low data byte 0x00 0x15 c0datah r ch0 adc high data byte 0x00 0x16 c1datal r ch1 adc low data byte 0x00 0x17 c1datah r ch1 adc high data byte 0x00 register description
datasheet - apr. 2013 - ams163.5 TSL2591 C 11 the command register specifies the address of the target register for future read and write operations, as well as issues special function commands. 76543210 cmd transaction addr/sf fields bits description cmd 7 select command register. must write as 1 when addressing command register. transaction 6:5 select type of transaction to follow in subsequent data transfers field value description 00 reserved - do not use 01 normal operation 10 reserved C do not use 11 special function C see description below addr/sf 4:0 address field/special function field. depending on the transaction type, see above, this field either specifies a special function command or selects the specific control-status-data register for subsequent read and write transactions. the field values listed below apply only to special function commands. field value description 00100 interrupt set C forces an interrupt 00110 clears als interrupt 00111 clears als and no persist als interrupt 01010 clears no persist als interrupt other reserved C do not write the interrupt set special function command sets the interrupt bits in the status register (0x13). for the interrupt to be visible on the int pin, one of the interrupt enable bits in the enable register (0x00) must be asserted. the interrupt set special function must be cleared with an interrupt clear special function. the als interrupt clear special functions clear any pending interrupt(s) and are self-clearing. command register
TSL2591 C 12 datasheet - apr. 2013 - ams163.5 the enable register is used to power the device on/off, enable functions and interrupts. 76543210 npien sai reserved aien reserved aen pon fields bits description npien 7 no persist interrupt enable. when asserted np threshold conditions will generate an interrupt, bypassing the persist filter. sai 6 sleep after interrupt. when asserted, the device will power down at the end of an als cycle if an interrupt has been generated. reserved 5 reserved. write as 0. aien 4 als interrupt enable. when asserted permits als interrupts to be generated, subject to the persist filter. reserved 3:2 reserved. write as 0. aen 1 als enable. this field activates als function. writing a one activates the als. writing a zero disables the als. pon 0 power on. this field activates the internal oscillator to permit the timers and adc channels to operate. writing a one activates the oscillator. writing a zero disables the oscillator. enable register (0x00)
datasheet - apr. 2013 - ams163.5 TSL2591 C 13 the control register is used to configure the als gain and integration time. in addition, a system reset is provided. upon power up, the control register resets to 0x00. 76543210 sreset reserved again reserved atime fields bits description sreset 7 system reset. when asserted, the device will reset equivalent to a power-on reset. sreset is self-clearing. reserved 6 reserved. write as 0. again 5:4 als gain sets the gain of the internal integration amplifiers for both photodiode channels. field value description 00 low gain mode 01 medium gain mode 10 high gain mode 11 maximum gain mode reserved 3 reserved. write as 0. atime 2:0 als time sets the internal adc integration time for both photodiode channels. field value integration time max count 000 100 ms 37888 001 200 ms 65535 010 300 ms 65535 011 400 ms 65535 100 500 ms 65535 101 600 ms 65535 control register (0x01)
TSL2591 C 14 datasheet - apr. 2013 - ams163.5 the als interrupt threshold registers provide 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 ab ove the higher threshold, an interrupt is asserted on the interrupt pin. if the c0data exceeds the persist thresholds (registers: 0x04 C 0x07) for the number of persist cycles configured in the persist register an interrupt will be triggered. if the c0data exceeds the no-persist thresholds (registers: 0x08 C 0x0b) an interrupt will be triggered immediately fo llowing the end of the current integration. note that while the interrupt is observable in the status register (0x13), it is visible only on the int pin when aien or npien are enabled in the enable register (0x00). upon power up, the interrupt th reshold registers default to 0x00. 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 npailtl 0x08 7:0 no persist als low threshold lower byte npailth 0x09 7:0 no persist als low threshold upper byte npaihtl 0x0a 7:0 no persist als high threshold lower byte npaihth 0x0b 7:0 no persist als high threshold upper byte als interrupt threshold register (0x04 ? 0x0b)
datasheet - apr. 2013 - ams163.5 TSL2591 C 15 the interrupt persistence filter sets the number of consecutive out-of-range als cycles necessary to generate an interrupt. out-of-range is determined by comparing c0data (0x14 and 0x15) to the interrupt threshold registers (0x04 - 0x07). note that the no-persist als interrupt is not affected by the interrupt persistence filter. upon power up, the interrupt persistence filter register resets to 0x00. 76543210 reserved apers field bits description reserved 7:4 reserved. write as 0. apers 3:0 als interrupt persistence filter field value persistence 0000 every als cycle generates an interrupt 0001 any value outside of threshold range 0010 2 consecutive values out of range 0011 3 consecutive values out of range 0100 5 consecutive values out of range 0101 10 consecutive values out of range 0110 15 consecutive values out of range 0111 20 consecutive values out of range 1000 25 consecutive values out of range 1001 30 consecutive values out of range 1010 35 consecutive values out of range 1011 40 consecutive values out of range 1100 45 consecutive values out of range 1101 50 consecutive values out of range 1110 55 consecutive values out of range 1111 60 consecutive values out of range persist register (0x0c)
TSL2591 C 16 datasheet - apr. 2013 - ams163.5 the pid register provides an identification of the devices package. this register is a read-only register whose value never changes. the id register provides the device identification. this register is a read-only register whose value never changes. the status register provides the internal status of the device. this register is read only. 76543210 reserved packageid reserved field bits description reserved 7:6 reserved. pid 5:4 package identification = 00 reserved 3:0 reserved. 76543210 id field bits description id 7:0 device identification = 0x50 76543210 reserved npintr aint reserved avalid field bits description reserved 7:6 reserved. write at zero. npintr 5 no-persist interrupt. indicates th at the device has encountered a no-persist interrupt condition. aint 4 als interrupt. indicates that the device is asserting an als interrupt. reserved 3:1 reserved. avalid 0 als valid. indicates that the adc channels have completed an integration cycle since the aen bit was asserted. pid register (0x11) id register (i0x12) status register (0x13)
datasheet - apr. 2013 - ams163.5 TSL2591 C 17 als data is stored as two 16-bit values; one for each channel. when the lower byte of either channel is read, the upper byte of the same channel is latched into a shadow register. the shadow register ensures that both bytes are the result of the same als integration cycle, even if additional integration cycles occur between the lower byte and upper byte register readings. each channel independently operates the upper byte shadow register. so to minimize the potential for skew between ch0 and ch1 data, it is recommended to read all four adc bytes in sequence. the simplest way to accomplish this is to perform a four-byte i 2 c read operation using the auto-increment protocol, which is set in the command register transaction field. register address bits description c0datal 0x14 7:0 als ch0 data low byte c0datah 0x15 7:0 als ch0 data high byte c1datal 0x16 7:0 als ch1 data low byte c1datah 0x17 7:0 als ch1 data high byte als data register (0x14 - 0x17)
TSL2591 C 18 datasheet - apr. 2013 - ams163.5 figure TSL2591 - 17 shows a typical hardware application circuit. a 1-f low-esr decoupling capacitor should be placed as close as possible to the v dd pin. v bus in this figure refers to the i 2 c bus voltage, which is equal to v dd . figure TSL2591 C 17: typical application hardware circuit the i 2 c signals and the interrupt are open-drain outputs and require pull-up resistors. the pull-up resistor (rp) value is a function of the i 2 c bus speed, the i 2 c 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. application information TSL2591
datasheet - apr. 2013 - ams163.5 TSL2591 C 19 suggested land pattern based on the ipc?7351b generic requirements for surface mount design and land pattern standard (2010) for the small outline no-lead (son) package is shown in figure TSL2591 - 18. figure TSL2591 C 18: suggested fn package pcb layout (top view) notes: 1. all linear dimensions are in millimeters. 2. this drawing is subject to change without notice. pcb pad layout
TSL2591 C 20 datasheet - apr. 2013 - ams163.5 figure TSL2591 C 19: fn package C dual flat no-lead packaging configuration notes: 1. all linear dimensions are in micrometers. 2. the die is centered within the package within a tolerence of 75 m. 3. packag e to p su rface is m old ed with an e lectrically no n-cond u ctive cle ar plas tic com po und having an ind ex o f ref ractio n 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. package drawings and markings
datasheet - apr. 2013 - ams163.5 TSL2591 C 21 figure TSL2591 C 20: fn package carrier tape and reel information notes: 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 a o , b o and k o 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. mechanical data
TSL2591 C 22 datasheet - apr. 2013 - ams163.5 the package has been tested and has demonstrated an ability to be reflow soldered to a pcb substrate. 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 shou ld be limited to a maximum of three passes through this solder reflow profile. figure TSL2591 C 21: solder reflow profile figure TSL2591 C 22: solder reflow profile graph note: not to scale C for reference only. parameter reference device average temperature gradient in preheating 2.5 oc/sec soak time t soak 2 to 3 minutes time above 217 oc (t1) t 1 max 60 sec time above 230 oc (t2) t 2 max 50 sec time above t peak - 10 oc (t3) t 3 max 10 sec peak temperature in reflow t peak 260 oc temperature gradient in cooling max -5 oc/sec soldering information
datasheet - apr. 2013 - ams163.5 TSL2591 C 23 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 baked prior to being dry packed for shipping. devices are dry packed in a sealed aluminized envelope called a moisture-barrier bag with silica gel to protect them from ambient moisture during shipping, handling, and storage before use. shelf life the calculated shelf life of the device in an unopened moisture barrier bag is 12 months from the date code on the bag when stored under the following conditions: ? shelf life: 12 months ? ambient temperature: < 40 c ? relative humidity: < 90% rebaking of the devices will be required if the devices exceed the 12 month shelf life or the humidity indicator card shows that the devices were exposed to conditions beyond the allowable moisture region. floor life the fn package has been assigned a moisture sensitivity level of msl 3. as a result, the floor life of devices removed from the moisture barrier bag is 168 hours from the time the bag was opened, provided that the devices are stored under the following conditions: ? floor life: 168 hours ? ambient temperature: < 30 c ?relative humidity: < 60% if the floor life or the temperature/humidity conditions have been exceeded, the devices must be rebaked prior to solder reflow or dry packing. rebaking instructions when the shelf life or floor life limits have been exceeded, rebake at 50 c for 12 hours. storage information
TSL2591 C 24 datasheet - apr. 2013 - ams163.5 the term rohs complaint means that ams products fully comply with current rohs directive. 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 means rohs compliant and no sb/br). ams defines green that additionally 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 and disclaimer the information provided in this statement represents ams knowledge and belief as of the date that it is provided. ams 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 unde rway to better integrate information from third parties. ams 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 and ams suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. rohs compliant and ams green statement
datasheet - apr. 2013 - ams163.5 TSL2591 C 25 copyright ? 1997-2013, ams ag, tobelbaderstrasse 30, 8141 unterpremstaetten, 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 appear ing in its term of sale. ams ag makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. 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 normal 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. for shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. the information furnished here by ams ag is believed to be correct and accurate. however, 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. copyrights disclaimer

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