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lite-on dcc release lite-on technology corp. / optoelectronics no.90,chien 1 road, chung ho, new taipei city 23585, taiwan, r.o.c. tel: 886-2-2222-6181 fax: 886-2-2221-1948 / 886-2-2221-0660 http://www.liteon.com/opto optical sensor product data sheetLTR-329ALS-01 spec no.: ds86-2014-0006effective date: 09/04/2014revision: b bns-od-fc001/a4 bns-od-fc001/a4 bns-od-fc001/a4 bns-od-fc001/a4
1 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 1. description the ltr - 329als - 01 is a low voltage i2c digital light sensor [als] in a low cost miniature chipled lead - free surface mount package. this sensor converts light intensity to a digital output signal capable of direct i 2 c interface. it provides a linear response over a wide dynamic range from 0.01 lux to 64k lux and is well suited to applications under high ambient brightness. there are altogether six gain settings (1x, 2x, 4x, 8x, 48x and 96x) available for user to configure. this cmos design and factory - set one time trimming capability ensure minimal sensor - to - sensor variations for ease of manufacturability to the end customers. 2 . features ? i 2c interface (fast mode @ 400kbit/s) ? ultra - small chipled package ? built - in temperature compensation ci rcuit ? low active power consumption with standby mode ? supply voltage range from 2.4v to 3.6v capable of 1.7v logic voltage ? operating temperature range from - 30 c to +70 c ? rohs and halogen free compliant ? light sensor ? close to human eye spectral response ? immunity to ir / uv light source ? automatically rejects 50 / 60 hz lightings flicker ? 6 dynamic range from 0.01 lux to 64k lu x ? 16 - bit effective resolution 3 . applications to control display backlight in ? mobile devices: mobile phone, pda ? computing devices: notebook pc, desktop monitor ? consumer devices: lcd/pdp tv backlight systems, cameras, personal navigation device, digital photo frame ? dashboard
2 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 4 . ordering information part number packaging type package quantity ltr - 329als - 01 tape and reel 4 - pins chipled package 25 00 5 . outline dimensions notes : 1. all dimensions are in millimeters.
3 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 6 . functional block diagram 7 . application circuit
4 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 i/o pins configuration table pin i/o type symbol description 1 vdd power supply volta ge 2 gnd ground 3 i /o s da i 2 c serial data. this pin is an open drain input / output. 4 i s cl i 2 c serial clock. this pin is an open drain input. recommended application circuit components component recommended value rp1, rp2, rp3 [1] 1 k ? to 10 k ? c 1, c2 1uf ?
5 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 8 . ratings and specifications absolute maximum ratings at ta = 25 ? c parameter symbol rating unit supply voltage vdd 3.8 v digital voltage range scl, sda, int - 0.5 to 3.8 v digital output current scl, sda, int - 1 to 20 ma storage temperature t stg - 40 to 100 ? c note: exceeding these ratings could cause damage to the sensor. all voltages are with respect to ground. currents are positive into, negative out of the specified terminal. recommended operating conditions d escription symbol min. typ. max. unit supply voltage vdd 2.4 3.6 v led supply voltage vled 2.5 4.35 v interface bus power supply voltage v io 1.7 3.6 v operating temperature t ope - 30 70 ? c electrical & optical specifications all specifications ar e at vdd = 3.0v, t op e = 25 ? c, unless otherwise noted. parameter min. typ. max. unit condition active supply current 250 ua active mode, t ope = 25 ? c standby current 5 ua standby / sleep mode initial startup time 60 100 1000 ms (note 1) wakeup time f rom standby 10 ms (note 1)
6 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 light sensor parameter min. typ. max. unit condition full scale adc count 65535 count full scale adc count dark adc count 0 6 count ch0, lux = 0 0 6 count ch1, lux = 0 adc count (gain=96) 830 3250 1550 6100 co unt count ch0, lux = 200 (white led) ch1, lux = 200 (white led) integration time : 50ms measurement time : 100ms als ratio 0.15 0.35 ratio ratio = ch1/(ch1 + ch0), lux = 200 (white led) typical performance curve all specifications are at vdd = 3.0v, t ope = 25 ? c, unless otherwise noted. figure 1: normalized spectral response
7 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 figure 2 : viewing angle figure 3 : vdd versus average idd
8 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 figure 4 : average idd versus temperat ure figure 5 : output count ratio versus temperature
9 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 lux formula refer to appendix a for the lux formula notes: 1. startup sequence supply vdd to sensor (sensor in standby mode) i2c command (write) to enable sensor to active mode wait 100 ms (min) - initial startup time sensor is active and starts measurement wait 10 ms (max) - wakeup time from standby
10 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 ac e lectrical characteristics all specifications are at vbus = 1.8v, t ope = 25 ? c, unless otherwise noted. parameter symbol min. max. unit scl clock frequency 1 400 khz bus free time between a stop and start condition 1.3 u s hold time (repeated) start condition. after this period, the first clock pulse is generated 0.6 u s low period of the scl clock 1.3 u s high period of the scl clock 0.6 u s set - up time for a repeated start condition 0.6 u s set - up time for stop condition 0.6 u s rise time of both sda and scl signals 30 300 ns fall time of both sda and scl signals 30 300 ns data hold time 0.3 0.9 u s data setup time 100 ns pulse width of spikes which must be suppressed by the input filter 0 50 ns definition of timing for i 2 c bus scl f buf t sta hd t ; low t high t sta su t ; sto su t ; r t f t dat hd t ; dat su t ; sp t
11 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 9 . principles of operation i 2 c protocols i 2 c write protocol (type 1): i 2 c write protocol (type 2): i 2 c read protocol: s l a v e a d d r e s s w a s r e g i s t e r a d d r e s s a p 7 1 1 1 8 1 1 s l a v e i d ( w r i t e ) s c l 1 2 3 4 5 6 7 8 9 s d a s 6 s 5 s 4 s 3 s 2 s 1 s 0 1 2 3 4 5 6 7 8 9 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 s l a v e a d d r e s s r e g i s t e r a d d r e s s a a s p w s l a v e i d ( w r i t e ) s l a v e a d d r e s s w a s r e g i s t e r a d d r e s s a p 7 1 1 1 8 1 1 r e g i s t e r c o m m a n d a 8 1 s l a v e i d ( w r i t e ) s c l 1 2 3 4 5 6 7 8 9 s d a s 6 s 5 s 4 s 3 s 2 s 1 s 0 1 2 3 4 5 6 7 8 9 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 s l a v e a d d r e s s r e g i s t e r a d d r e s s a a s 1 2 3 4 5 6 7 8 9 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 r e g i s t e r c o m m a n d a p w s l a v e i d ( w r i t e ) s 1 s l a v e a d d r e s s r a n 7 1 1 8 1 r e g i s t e r c o m m a n d p 1 s l a v e i d ( r e a d )
12 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 i 2 c read (combined format) protocol: a acknowledge (0 for an ack) n non - acknowledge(1 for an nack) s start condition sr repeated start condition p stop condition w write (0 for writing) r r ead (1 for read) slave - to - master master - to - slave i 2 c slave address the 7 bits slave address for this sensor is 0x29 h. a read/write bit should be appended to the slave address by the master dev ice to properly communicate with the sensor. s c l 1 2 3 4 5 6 7 8 9 s d a s 6 s 5 s 4 s 3 s 2 s 1 s 0 1 2 3 4 5 6 7 8 9 c 7 c 6 c 5 c 4 c 3 c 2 c 1 c 0 s l a v e a d d r e s s r e g i s t e r c o m m a n d a n s p r s l a v e i d ( r e a d ) s l a v e a d d r e s s w a s r e g i s t e r a d d r e s s a s r 7 1 1 1 8 1 1 s l a v e a d d r e s s r a n 7 1 1 8 1 r e g i s t e r c o m m a n d p 1 s l a v e i d ( w r i t e ) s l a v e i d ( r e a d ) s c l 1 2 3 4 5 6 7 8 9 s d a s 6 s 5 s 4 s 3 s 2 s 1 s 0 1 2 3 4 5 6 7 8 9 a 7 a 6 a 5 a 4 a 3 a 2 a 1 a 0 s l a v e a d d r e s s r e g i s t e r a d d r e s s a a s s r w 1 2 3 4 5 6 7 8 9 c 7 c 6 c 5 c 4 c 3 c 2 c 1 c 0 r e g i s t e r c o m m a n d a n p 1 2 3 4 5 6 7 8 9 s 6 s 5 s 4 s 3 s 2 s 1 s 0 s l a v e a d d r e s s a r
13 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 i 2 c slave address command type (0x29 h) w/r value bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 write 0 1 0 1 0 0 1 0 0x52 h read 0 1 0 1 0 0 1 1 0x53 h register set addr r / w register name description res et value 0x80 r / w als_contr als operation mode control sw reset 0x00 0x85 r / w als_meas_rate als measurement rate in active mode 0x03 0x86 r part_id part number id and revision id 0xa0 0x87 r manufac_id manufacturer id 0x05 0x88 r als_data_ch1_0 al s measurement ch1 data, lower byte 0x00 0x89 r als_data_ch1_1 als measurement ch1 data, upper byte 0x00 0x8a r als_data_ch0_0 als measurement ch0 data, lower byte 0x00 0x8b r als_data_ch0_1 als measurement ch0 data, upper byte 0x00 0x8c r als_status al s new data status 0x00 notes: 1) when reading als data registers, read sequence should always be from lower address to higher address (e.g. for als data, ch1 data should be read first followed by ch0 data. read sequence should be 0x88, 0x89, 0x8a, 0x8b. whe n 0x8b is read, all four als data registers will be populated with new set of data).
14 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 als_contr register (0x80) the als_contr register controls the als gain setting, als operation modes and software (sw) reset for the sensor. the als sens or can be set to either standby mode or active mode. at either of these modes, the i 2 c circuitry is always active. the default mode after power up is standby mode. during standby mode, there is no als measurement performed but i 2 c communication is allowed to enable read/write to all the registers field bits default type description reserved 7:5 000 -- -- -- als gain 4:2 000 rw 000 gain 1x ? 1 lux to 64k lux ( default) 001 gain 2x ? 0.5 lux to 32k lux 010 gain 4x ? 0.25 lux to 16k lux 011 gain 8x ? 0.125 lux to 8k lux 100 reserved 101 reserved 110 gain 48x ? 0.02 lux to 1.3k lux 111 gain 96x ? 0.01 lux to 600 lux sw reset 1 0 rw 0 initial start - up procedure is not started (default) 1 initial start - up procedure is started, bit has default value of 0 after start - up als mode 0 0 rw 0 stand - by mode (default) 1 active mode 0x80 als_contr (default = 0x00) b7 b6 b5 b4 b3 b2 b1 b0 reserved als gain sw reset als mode
15 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 als_meas_rate register (0x85) the als_meas_rat e register controls the integration time and timing of the periodic measurement of the als in active mode. als measurement repeat rate is the interval between als_data registers update. als integration time is the measurement time for each als cycle. als i ntegration time must be set to be equal or smaller than the als measurement repeat rate. if als integration time is set to be bigger than als measurement repeat rate, it will be automatically reset to be equal to als measurement repeat rate by the ic inter nally. field bits default type description reserved 7:6 00 -- -- -- als integration time 5:3 000 rw 000 100ms (default) 001 5 0ms 010 200ms 011 400ms 100 150ms 101 250ms 110 300ms 111 350ms als measurement rate 2:0 011 rw 000 50ms 001 100ms 010 200ms 011 500ms (default) 100 1000ms 101 2000ms 110 111 0x85 als_meas_rate (default = 0x03) b7 b6 b5 b4 b3 b2 b1 b0 reserved als integration time als measurement repeat rate
16 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 part_id reg ister (0x86) (read only) the part_id register defines the part number and revision identification of the sensor. field bits default type description part number id 7:4 1010 r part id 0x0ah revision id 3:0 0000 r revision id 0x00h manufac_id register (0x87) (read only) the manufac_id register defines the manufacturer identification of the sensor. field bits default type description manufacturer id 7:0 00000101 r manufacturer id (0x05h) 0x86 part_id (default = 0x92) b7 b6 b5 b4 b3 b2 b1 b0 part number id revision id 0x87 manufac_id (default = 0x05) b7 b6 b5 b4 b3 b2 b1 b0 manufacture r id
17 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 als_data_ch1 register (0x88 / 0x89) (read only) the als_data registers should be read as a group, with the lower address read back first (i.e. read 0x8 8 first, then read 0x89). these two registers should also be read before reading channel - 0 data (from registers 0x8a, 0x8b). when the i 2 c read operation starts, all four als data registers are locked until the i 2 c read operation of register 0x8b is complet ed. this will ensure that the data in the registers is from the same measurement even if an additional integration cycle ends during the read operation. new measurement data is stored into temporary registers and the als_data registers are updated as soon as there is no on - going i 2 c read operation. the als adc channel - 1 data is expressed as a 16 - bit data spread over two registers. the als_data_ch1_0 and als_data_ch1_1 registers provide the lower and upper byte respectively. field addr ess bits default type description als data ch1 low 0x88 7:0 00000000 r als adc channel 1 lower byte data al s data ch1 high 0x89 7:0 00000000 r als adc channel 1 upper byte data 0x88 als_data_ch1_0 (default = 0 x00) b7 b6 b5 b4 b3 b2 b1 b0 als data ch1 low 0x89 als_data_ch1_1 (default = 0x00) b7 b6 b5 b4 b3 b2 b1 b0 als data ch1 high
18 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 als_data_ch0 register (0x8a / 0x8b) (read only) these two registers should be read after reading channel - 1 data (from registers 0x88, 0x89). lower address register should be read f irst (i.e read 0x8a first, then read 0x8b). see als_data_ch1 register information above. the als adc channel - 0 data is expressed as a 16 - bit data spread over two registers. the als_data_ch0_0 and als_data_ch0_1 registers provide the lower and upper byte re spectively. field addr ess bits default type description als data ch0 low 0x8a 7:0 000 00000 r als adc channel 0 lower byte data als data ch0 high 0x8b 7:0 00000000 r als adc channel 0 upper byte data als_ status register (0x8c) (read only) the als_status register stores the information about als data status. new data means data has not been read yet. when the measurement is completed and data is written to the data register, the data status bit will be set to logic 1. when the d ata register is read, the data status bit will be set to logic 0 . 0x8a als_data_ch0_0 (default = 0x00) b7 b6 b5 b4 b3 b2 b1 b0 als data ch0 low 0x8b als_data_ch0_1 (default = 0x00) b7 b6 b5 b4 b3 b2 b1 b0 als data ch0 high
19 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 field bits default type description als data valid 7 0 r 0 als data is valid (default) 1 als data is invalid als data gain range 6:4 000 r 000 als measured data in gain 1x (default) 001 als measured data in gain 2x 010 als measured data in gain 4x 011 als measured data in gain 8x 100 invalid 101 invalid 110 als measured data in gain 48x 111 als measured data in gain 96x re served 3 0 r 0 dont care als data status 2 0 r 0 old data (data already read), ( default) 1 new data (first time data is being read) reserved 1:0 00 r -- dont care 0x8c als_ps_status (default = 0x00) b7 b 6 b5 b4 b3 b2 b1 b0 als data valid als gain als interrupt status als data status reserved
20 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 10 . device operation(using interrupt) below flow diagram illustrates the l tr - 329als operation.
21 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 11 . pseudo codes examples control registers // the control register defines the operating modes and gain settings of the als of ltr - 329. // default settings is 0x00 (in standby mode). slave_addr = 0x29 // slave address of l tr - 329 device // enable als register_addr = 0x80 // als_contr register command = 0x01 // for gain x1 // for gain x96, command = 0x1d writebyte(slave_addr, register_addr, command) als measurement rate // the als_meas_rate register controls th e als integration time and measurement rate. // default setting of the register is 0x03 (integration time 100ms, repeat rate 500ms) slave_addr = 0x29 // slave address of ltr - 329 device // set als integration time 200ms, repeat rate 200ms register_ad dr = 0x85 // als_meas_rate register command = 0x12 // int time = 200ms, meas rate = 200ms // for int time = 400ms, meas rate = 500ms, command = 0x1b writebyte(slave_addr, register_addr, command) als data registers (read only) // the als data registers contain the adc output data for the respective channel. // these registers should be read as a group, with the lower address being read first. slave_addr = 0x29 // slave address of ltr - 329 device // read back als_data_ch1 register_ad dr = 0x88 // als_data_ch1 low byte address readbyte(slave_addr, register_addr, data0) register_addr = 0x89 // als_data_ch1 high byte address readbyte(slave_addr, register_addr, data1) // read back als_data_ch0 register_addr = 0x8a // als_data_ ch0 low byte address readbyte(slave_addr, register_addr, data2) register_addr = 0x8b // als_data_ch0 high byte address readbyte(slave_addr, register_addr, data3) als_ch1_adc_data = (data1 << 8) | data0 // combining lower and upper bytes to give 16 - bi t ch1 data als_ch0_adc_data = (data3 << 8) | data2 // combining lower and upper bytes to give 16 - bit ch0 data
22 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 als status register (read only) // the als_status register contains the information on als data availability status. // this register is r ead only. slave_addr = 0x29 // slave address of ltr - 329 device // read back register reg ister_addr = 0x8c // als_status register address readbyte(slave_addr, register_addr, data) newdata_status = data & 0x04 // newdata_status = 4( decimal) ? als new data // als_data_valid = 0x00 ? als new data is valid (usable) // als_data_valid = 0x80 ? als new data is invalid, discard and wait for new als data
23 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 12 . recommended leadfree reflow profile process zone symbol ? t maximum ? t/ ? time or duration heat up p1, r1 25 ? c to 150 ? c 3 ? c/s solder paste dry p2, r2 150 ? c to 200 ? c 100s to 180s solder reflow p3, r3 p3, r4 200 ? c to 26 0 ? c 260 ? c to 200 ? c 3 ? c/s - 6 ? c/s cool down p4, r5 200 ? c to 25 ? c - 6 ? c/s time maintained above liquidus point , 217 ? c > 217 ? c 60s to 90s peak temperature 260 ? c - time within 5 ? c of actual peak temperature > 255 ? c 20s time 25 ? c to peak temperature 25 ? c t o 260 ? c 8mins it is recommended to perform reflow soldering no more than twice. 50 100 150 200 250 300 t-time (seconds) 25 80 120 150 180 200 230 255 0 t - temperature (c) r1 r2 r3 r4 r5 217 max 260c 60 sec to 90 sec above 217 c p1 heat up p2 solder paste dry p3 solder reflow p4 cool down
24 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 13 . moisture proof packaging all ltr - 329als - 01 are shipped in moisture proof package. once opened, moisture absorption begins. this part is compliant to jedec j - std - 033a level 3. time from unsealing to soldering after removal from the moisture barrier bag, the parts should be stored at the recommended storage conditions and soldered within seven days. when the moisture barrier bag is opened and the parts are exposed to the recommended storage conditions for more than seven days, the parts must be baked before reflow to prevent damage to the parts. recommended storage conditions storage temperature 10 ? c to 30 ? c relative humidity below 60% rh baking conditions package temperature time in reels 60 ? c 48 hours in bulk 100 ? c 4 hours baking should only be done once.
25 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 14 . recommended land pattern and metal stencil aperture recommended land pattern
26 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 recommended metal stencil aperture it is recommended that the metal stencil used for solder paste printing has a thickness (t) of 0.11mm (0.004 inches / 4 mils) or 0.127mm (0.005 inches / 5 mils). the stencil aperture opening is recommended to be 0.72mm x 0.60mm which has the same dimension as the land patte rn. this is to ensure adequate printed solder paste volume and yet no shorting. note: 1. all dimensions are in millimeters
27 / 27 p art no. : l t r - 329als - 01 bns - od - fc002/a4 optical sens or l tr - 329als - 01 15 . package dimension for tape and reel notes: 1. all dimensions are in millimeters (inches) 2. empty com ponent pockets sealed with top cover tape 3. 7 inch reel - 25 00 pieces per reel 4. in accordance with ansi/eia 481 - 1 - a - 1994 specifications .

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