View ALS-PDIC17-57B-TR8_3530010.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 1 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 features ? close to the human eye's response ? 15 bit effective resolution ? 50hz/60hz rejection ? low sensitivity variation across various light sour ces ? operating temperature performance, -40 o c to 85 o c ? wide supply voltage range, 2.7v to 5.5v ? low power consumption, less than 2mw while opera ting ? shut-down mode, current consumption less than 0. 1ua ? i 2 c serial port communication: (1) standard 100khz, ( 2) fast 400khz ? high dynamic sensing range and from 0 to 88,000 lux ? dimension: 2.0mm(l)x2.0mm(w)x0.6mm(h) ? rohs compliant and pb free description the als-pdic17-57b/tr8 is a digital-output l ight sensor with a two-wire, i 2 c serial interface that is compatible with smbus operating a t 100 khz serial clock frequency. it combines a photodiode and an analog-to-digital conv erter (adc) on a single cmos integrated circuit to provide light measurements over an effec tive 15-bit dynamic range. one operation modes are provided with constantly refreshing adc. when working in one time integration mode, no external resister is required. the integra ting conversion technique used by als-pdic17-57b/tr8 effectively eliminates the effec t of flicker from ac-powered lamps, increasing the stability of the measurement. als-pd ic17-57b/tr8 is very close to human-eye vision, having very low response to non-visible lig ht, such as infrared and ultra-violet light. applications ? detection of ambient light to control display backl ighting mobile devices ? mobile phones, pdas, table pc and gps computing device ? tft lcd monitor consumer device ? tft lcd tv, plasma tv, video came ra, digital camera, toys ? detection of ambient light for controlling the ba cklighting of tft lcd display ? automatic residential and commercial lighting man agement ? automatic contrast enhancement for electronic sig nboard ? ambient light monitoring device for daylight and artificial light
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 2 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 package dimensions unit: mm tolerance: 0.1mm
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 3 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 absolute maximum ratings (ta=25 ) parameter symbol min. max. units storage temperature t stg -40 100 c operating temperature t opr -40 85 c supply voltage v dd -0.3 6.0 v digital output voltage vo -0.3 6.0 v digital output current io -10 +10 ma esd tolerance, human body model - 2 - kv block diagram & pad descriptions figure 1 als-pdic17-57b/tr8 functional block diagram i 2 c register
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 4 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 electrical and optical characteristics (ta=25 , v dd =3.3v) note: 1. fluorescent light (color temperature = 6500k) is used as light source. however, white led is substi tuted in mass production. 2. illuminance by cie standard illuminant-a 2856k o f incandescent lamp. dc characteristics of i 2 c signals in standard and fast mode parameter symbol standard mode fast mode unit min. max. min. max. power supply voltage (recommend) v dd 2.7 5.5 2.7 5.5 v low level input voltage v il -0.5 1.0 -0.5 1.0 v high level input voltage v ih v dd x0.6 [note3] v dd x0.6 [note3] v hysteresis of schmitt trigger inputs (v dd > 2v) v hys 0.05v dd - 0.05v dd - v low level output voltage (open drain) at 3ma sink current (v dd > 2v) v ol1 0 0.4 0 0.4 v output fall time from v ihmin to v ilmax with a bus capacitance from 10pf to 400pf t of - 250 [note2] 20+0.1cb [note1] 250 [note2] ns input current of each io pins with an input voltage between 0.1v dd and 0.9v dd i i/p -10 10 -10 10 ua capacitance for each io pin c i - 10 - 10 pf parameter symbol test conditions min. typ. max. units supply current i dd active mode - 0.4 0.5 ma i ddq power-down mode - - 0.1 ua i 2 c output low voltage v ol io = 4ma - - 0.4 v detection limit full scale - - 32,767 counts tint = 100ms - - 44,200 lux peak sensitivity wavelength p - 580 - nm response in dark environment r dark ev= 0lux, tint = 100ms - - 1 count response to fluorescent lamp [note1] r frst ev= 100lux tint = 100ms 44 73 102 counts response to incandescent lamp [note2] r icd ev= 100lx t int = 100ms 65 108 151 counts
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 5 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 notes: 1. cb = capacitance of one bus line in pf 2. the maximum t of for the i 2 c data and clock bus lines quoted in the ac table i s longer than the specified maximum t of for the output stages (250ns). this allows series protection resistors (r s ) to be connected between i 2 c data / clock pins and the i 2 c data / clock bus lines without exceeding the maximu m specified t of . 3. the i 2 c bus operation voltage is 1.8v, the als-pdic17-57b supply voltage must Q 3v (3vx0.6=1.8v) ac characteristics of i 2 c signals in standard and fast mode parameter symbol standard mode fast mode unit min. max. min. max. i 2 c clock frequency f scl 0 100 0 400 khz hold time (repeated) start condition. after this period, the first clock pulse is generated. t hd;sta 4.0 0.6 - us low period of i 2 c clock t low 4.7 1.3 us high period of i 2 c clock t high 4.0 0.6 us set-up time for a repeated start condition t su;sta 4.7 0.6 us data hold time for i 2 c-bus devices t hd;dat 0 3.45 0 0.9 us data set-up time t su;dat 250 - 100 - ns rise time of both i 2 c data and clock signals t r - 1000 5 300 ns fall time of both i 2 c data and clock signals t f - 300 0.1 300 ns set-up time for stop condition t su;sto 4.0 - 0.6 - us bus free time between stop and start condition t buf 4.7 - 1.3 - us capacitive load for each bus line c b - 400 - 400 pf figure 2 i 2 c timing diagram
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 6 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 typical electrical and optical characteristics curv es fig 3 light output vs. illuminance fig 4 current co nsumption vs. illuminance fig 5 current consumption vs. supply voltage fig 6 light output vs. supply voltage fig 7 light output vs. supply voltage fig 8 current consumption vs. temperature
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 7 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 fig 9 light output vs. temperature fig 10 light output vs. temperature fig 11 spectrum fig 12 relative sensitivity vs. angle
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 8 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 communication protocol als-pdic17-57b contains an 8-bit command register t hat can be written and read via the i 2 c bus. the command register controls the overall op eration of the device. there is a two-byte word read-only register that contains the latest converted value of a/d converter. the i 2 c slave address is hardwired internally as 0101001 (0x29, msb to lsb, a6 to a0). all the send byte protocol, the receive byte protocol and r eceive word protocol are implemented in als-pdic17-57b. the send byte protocol allows single bytes of data to be written to the device (see figure 13-a). the written byte is called the command byte. the receive byte protocol allows one-byte data to be read from the device (see figur e 13-b). two-byte data can be read by following the receive word protocol shown in figure 13-c. in figure 13, the clear area represents data sent by the host (master) and the s haded area represents data returned by the ambient light sensor (slave device). 1 7 1 1 8 1 1 s slave address wr a command byte a p 0 0 0 (a) send byte protocol 1 7 1 1 8 1 1 s slave address rd a data na p 1 0 1 (b) receive byte protocol 1 7 1 1 8 1 8 1 1 s slave address rd a ls byte of adc a ms byte of adc na p 1 0 0 1 (c) receive word (two bytes) protocol s = start condition p = stop condition shaded = slave transmission a = acknowledge na = not acknowledge wr = write rd = read figure 13 communication protocol
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 9 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 communication format als-pdic17-57b is capable of working as an i 2 c slave. address of this device on i 2 c bus is always 0x29 (hexadecimal number 29). registers o f the slave device can be programmed by sending commands over i 2 c bus. figure 14 shows an i 2 c write operation. to write to an internal register of the slave device a command must be sent by an i 2 c master. as illustrated in figure 14, the i 2 c write command begins with a start condition. after the st art condition, seven bits of address are sent with msb going first. rd / wr n (=low) command bit follows the address bits. upon receiving a valid address the slave device responds by driving sda low for an ack. after receiving an ack, i 2 c master sends eight bits of data with msb first. u pon receiving eight bits of data the slave device generates an ack. i 2 c master terminates this write command with a stop condition. figure 14 i 2 c timing diagram for send byte format figure 15 shows an i 2 c read command sent by the master to the slave devi ce. i 2 c read command begins with a start condition. after the st art condition seven bits of address are sent by the master with msb going first. after the addre ss bits, rd / wr n command bit is sent. for a read command the rd / wr n bits is high. upon receiving the address bits and rd / wr n command bits the slave device responds with an ack. after sending an ack, the slave device sends eight bits of data with msb going first. afte r receiving the one byte data, the i 2 c master terminates this transaction by issuing a nack comma nd to indicate that the master only wanted to read one byte from the device. the master generates a stop condition to end this transaction.
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 10 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 figure 15 i 2 c timing diagram for receive byte format ambient light intensity count value can be obtained by reading registers of this device. ambient light intensity count is a 15-bit wide numb er plus a valid bit and hence word (two bytes) read operation is needed, as shown in figure 16. after receiving the two byte data, the i 2 c master terminates this transaction by issuing a n ack command to indicate that the master only wanted to read two bytes from the device. the master generates a stop condition to end this transaction. figure 16 i 2 c timing diagram for receive word format
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 11 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 theory of operation the photocurrent, generated by the built-in photodi ode while being illuminated, is proportionally converted to frequency; the digital frequency signal is then integrated by a 15-bit counter for a predetermined period of time ( t int ). this period of time is called integration time. the converted data are read out through a two -wire, i 2 c interface bus. since the photodiode has been specially processed to suppress the spectral response in infrared region, the readout is very close to the photonic transfer function, v(), which is the mathematic expression of human-eye's response to ambient light . address option for i 2 c the i 2 c address is determined before placing an order; th e default address is 0x29. adc register the adc register contains 16 bits with a 15-bit wi de data from d0 to d14 and a valid bit d15. the register is divided into two groups; d[15. .8] is the most significant (ms) byte and d[7..0] is the least significant (ls) byte. see tab le 1 for details. table 1 adc register structure valid bit data bits d15 d14 d13 ~ d8 d7~d1 d0 msb lsb most significant (ms) byte least significant (ls) b yte
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 12 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 device command there are eight command codes are provided for i 2 c master to control the ambient light sensor. the specific function corresponding to each command code is elaborate in table 2. table 2 command code list programming sequence external integration timing (1). after being powered on, the device will initia lly be in the shut-down mode (default setting). (2). to operate the device, issue an send byte prot ocol (see figure 13-a) with the device address 0x29 followed by a command byte of 0x04 to activate the ambient light sensor and put the device into "one time integration mode" . (3). i 2 c master sends a "start integration command" to the salve device by issuing send byte protocol with the device address 0x29 followed by a command byte of 0x08. command code function 1xxx_xxxx (binary code) shut-down mode, this is the default state after app lying v dd power to the device. during shut-down mode, users can do the communication test. except the msb must be logic 1, the value wri tten to the command register will not change any function and can be re ad back via the i 2 c bus by issuing receive byte protocol . 0x04 activate the ambient light sensor and put the devic e in [one time integration mode]. the integration time is controll ed by i 2 c commands, start and stop integration. 0x08 start integration: this command will reset the adc register to 0x0000 and begin a new integration in [one time integratio n mode]. 0x30 stop integration: this command will stop the integr ation in [one time integration mode] and set the valid bit (d[15]) hig h. 0x34 reserved for future expansion.
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 13 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 (4). after a period of user defined integration tim e, i 2 c master sends a "stop integration command" to the salve device by issuing send byte p rotocol with the device address 0x29 followed by a command byte of 0x30. (5). to read the adc conversion result, issue an re ceive word protocol (see figure 13-c) with the device address 0x29 followed by two-byte r eading procedures. (6). if the stop integration command is not receive d by the device, the valid bit (d[15]) will be 0 to indicate that the data is not valid. if there is a valid conversion result available, the valid bit (d[15]) will be set logic high, and the remaining 15 bits will represent valid data from the adc register. (7). data may be read repeatedly from the adc regis ter, and although it will remain valid, the adc register will not be updated until a new co mplete integration cycle has been carried out. in this cases, the power consumption o f the device can be reduced by issue a send byte protocol with the device address 0x29 f ollowed by a data byte of 1xxx_xxxx.(binary code) noise rejection and integration time in general, integrating type adcs have an excellen t noise rejection characteristics for periodic noise sources whose frequency is an intege r multiple of the integration time. for instance, a 60hz ac unwanted signals sum from 0ms to nx16.66ms (n = 1, 2...n i ) is zero. similarly, setting the als-pdic17-57b integration t ime to an integer multiple of periodic noise signal greatly improves the light sensor output sig nal in the presence of noise. the maximum detection range is inversely proportional to the in tegration time; that means the longer integration time the lower detection range. (see ta ble 3) table 3 detection range guide integration time ( ms ) detection range ( lux ) resolution ( lux / count ) 50 88,400 2.7 100 44,200 1.35 200 22,200 0.68 300 14,500 0.45 400 11,100 0.34
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 14 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 power supply decoupling and layout the power supply lines must be decoupled wi th capacitors, 4.7uf and 0.1uf, placed as close to the device package as possible. the bypass capacitor should have low effective series resistance (esr) and effective series inductance (e si), such as the common ceramic types, which provide a low impedance path to ground at hig h frequencies to handle transient currents caused by internal logic switching. als-pdic17-57b is relatively insensitive to layout. like other i 2 c devices, it is intended to provide excellent perf ormance even in significantly noisy environments. there are only a few considerations t hat will ensure best performance. route the supply and i 2 c traces as far as possible from all sources of noi se. the pull up resister of two line serial bus scl and sda are recommended to be around 4.7kohm, figure 17 application circuit 2.7v ~ 5.5v
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 15 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 recommended method of storage 1. do not open moisture proof bag before devices ar e ready to use. 2. shelf life in sealed bag from the bag seal date : 18 months at 10c~30c and < 90% rh. 3. after opening the package, the devices must be s tored at 10c~30c and 60%rh, and used within 168 hours (floor life). 4. if the moisture absorbent material ( desiccant material) has faded or unopened bag has exceeded the shelf life or devices (out of bag) hav e exceeded the floor life, baking treatment is required. 5. if baking is required, refer to ipc/jedec j-std- 033 for bake procedure or recommend the following conditions: 192 hours at 40c +5/C0c and < 5 % rh (reeled/t ubed/loose units) or 96 hours at 60c 5c and < 5 % rh (reeled/tube d/loose units) or 24 hours at 125c 5c, not suitable for reel o r tubes. recommended solder profile notice: (1) reflow soldering should not be done more than t wo times. (2) when soldering, do not put stress on the device s during heating. (3) after soldering, do not warp the circuit boar d.
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 16 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 soldering iron each terminal is to go to the tip of soldering iron temperature less than 350 for 3 seconds within once in less than the soldering iron capacity 25w. leave two seconds and more intervals, and do soldering of each terminal. be ca reful because the damage of the product is often started at the time of the hand solder. repairing repair should not be done after the device have bee n soldered. when repairing is unavoidable, a double-head soldering iron should be used (as below figure). it should be confirmed beforehand whether the characteristics of the device will or will not be damaged by repairing.
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 17 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 packing quantity specification 2000 pcs/ 1 reel label format cpn: customers production number p/n: production number qty: packing quantity cat: ranks hue: peak wavelength ref: reference lot no: lot number made in taiwan: production place
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 18 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 reel dimensions tape dimensions w e f d0 d1 p0 8.000.2 1.750.1 3.500.05 1.50+0.1/-0 1.000.1 4.000.05 p1 p2 t a0 b0 k0 4.000.1 2.000.05 0.230.05 2.150.05 2.150.05 0.950.05 unit: mm tolerance: 0.1 unit: mm
everlight electronics co., ltd. http://www.everlight.com document no: dls-00000xx rev0.1 j un. 22, 2011 19 surface - mount i 2 c digital ambient light sensor als-pdic17-57b/tr8 note: 1. above specification may be changed without notice. everlight will reserve authority on material change for above specification. 2. when using this product, please observe the absolut e maximum ratings and the instructions for using outlined in these specificat ion sheets. everlight assumes no responsibility for any damage resulting from use of the product which does not comply with the absolute maximum ratings and the instructions i ncluded in these specification sheets. 3. these specification sheets include materials protec ted under copyright of everlight corporation. please dont reproduce or cause anyone to reproduce them without everlights consent.

▲Up To Search▲

Price & Availability of ALS-PDIC17-57B-TR8

	To Download ALS-PDIC17-57B-TR8 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .