Integrated Digital Light Sensor with Interrupt ISL29035 Features The ISL29035 is an integrated ambient and infrared light-to-digital converter with I2C (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. • 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 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 11µs to 90ms, depending on oscillator frequency and ADC resolution. In normal operation, typical current consumption is 57µA. In order to further minimize power consumption, two power-down modes have been provided. If polling is chosen over continuous 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 I2C interface. The power consumption can be reduced to less than 0.3µA when powered down. • Supply current (typ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57µA • Shutdown current (max) . . . . . . . . . . . . . . . . . . . . . . . . . .0.3µA • I2C (SMB compatible) power supply . . . . . . . . . 1.7V to 3.63V • Sensor power supply . . . . . . . . . . . . . . . . . . . . . 2.25V to 3.63V • Operating temperature range. . . . . . . . . . . . . -40°C to +85°C • Small form factor package . . . . . . . 6 Ld 1.5x1.6x0.75 ODFN Applications • Mobile devices: smart phone, PDA, GPS • Computing devices: notebook PC, MacBook, tablets The ISL29035 supports a software brownout condition detection. The device powers up with the brownout bit asserted until the host clears it through the I2C interface. • Consumer devices: LCD-TV, digital camera • Industrial and medical light sensing The ISL29035 supports a software and hardware interrupt that remains asserted until the host clears it through the I2C 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 I2C supply from 1.7V to 3.63V, the ISL29035 is specified for operation over the -40°C to +85°C ambient temperature range. 100Ω VDD VDD_PULLUP 1µF 4.7kΩ 4.7kΩ 4.7kΩ 1 VDD MCU SDA 6 SDA SCL 5 SCL GPIO 4 INT ISL29035 NC 3 GND 2 FIGURE 1. ISL29035 TYPICAL APPLICATION DIAGRAM September 18, 2013 FN8371.0 1 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 For additional products, see www.intersil.com/product_tree 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 Corporation reserves the right to make changes in circuit design, software 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 responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements 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 Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 2 FN8371.0 September 18, 2013