1 integrated digital light sensor with interrupt ISL29035 the ISL29035 is an integrated ambient and infrared light-to-digital converter with i 2 c (smbus compatible) interface. its advanced self-calibrated photodiode array emulates human eye response with excellent ir rejection. the on-chip adc is capable of rejecting 50hz and 60hz flicker caused by artificial light sources. the lux range select feature allows users to program the lux range for optimized counts/lux. for ambient light sensing, an internal 16-bit adc has been designed based upon the charge-balancing technique. the adc conversion time is nominally 90ms and is user adjustable from 11s to 90ms, depending on oscillator frequency and adc resolution. in normal operation, typical current consumption is 57a. in order to further minimize power consumption, two power-down modes have been provided. if polling is chosen over contin uous measurement of light, the auto-power-down function shuts down the whole chip after each adc conversion for the measurement. the other power-down mode is controlled by software via the i 2 c interface. the power consumption can be reduced to less than 0.3a when powered down. the ISL29035 supports a software brownout condition detection. the device powers up with the brownout bit asserted until the host clears it through the i 2 c interface. the ISL29035 supports a software and hardware interrupt that remains asserted until the host clears it through the i 2 c interface. function of adc conversion continues without stopping after interrupt is asserted. designed to operate on supplies from 2.25v to 3.63v with an i 2 c supply from 1.7v to 3.63v, the ISL29035 is specified for operation over the -40c to +85c ambient temperature range. features ? resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-bits adc ? wide dynamic range . . . . . . . . . . . . . . . . . . . . . . .1:4,200,000 ? integrated noise reduction . . . . . . . . . . . . . . . . . . . . . 50/60hz ? close to human eye response with excellent ir/uv rejection ? shutdown modes . . . . . . . . . . . . . . . .software and automatic ? programmable interrupt threshold with persistence filter ? supply current (typ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57a ? shutdown current (max) . . . . . . . . . . . . . . . . . . . . . . . . . .0.3a ?i 2 c (smb compatible) power supply . . . . . . . . . 1.7v to 3.63v ? sensor power supply . . . . . . . . . . . . . . . . . . . . . 2.25v to 3.63v ? operating temperature range. . . . . . . . . . . . . -40c to +85c ? small form factor package . . . . . . . 6 ld 1.5x1.6x0.75 odfn applications ? mobile devices: smart phone, pda, gps ? computing devices: notebook pc, macbook, tablets ? consumer devices: lcd-tv, digital camera ? industrial and medical light sensing figure 1. ISL29035 typical application diagram ISL29035 mcu 1f scl sda 6 5 1 2 4 vdd gnd scl sda gpio 4.7k int vdd_pullup 3 nc 4.7k 4.7k vdd 100 september 18, 2013 fn8371.0 caution: these devices are sensitive to electrostatic discharge; follow proper ic handling procedures. 1-888-intersil or 1-888-468-3774 | copyright intersil americas llc 2013. all rights reserved intersil (and design) is a trademark owned by intersil corporation or one of its subsidiaries. all other trademarks mentioned are the property of their respective owners.
ISL29035 2 intersil products are manufactured, assembled and tested utilizing iso9000 quality systems as noted in the quality certifications found at www.intersil.com/design/quality intersil products are sold by description only. intersil corporat ion reserves the right to make changes in circuit design, soft ware and/or specifications at any time without notice. accordingly, the reader is cautioned to verify that data sheets are current before placing orders. information furnished by intersil is believed to be accurate and reliable. however, no responsi bility is assumed by intersil or its subsid iaries for its use; nor for any infringem ents of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of i ntersil or its subsidiaries. for information regarding intersil corporation and its products, see www.intersil.com fn8371.0 september 18, 2013 for additional products, see www.intersil.com/product_tree
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