APDS-9900 and APDS-9901 Digital Proximity and Ambient Light Sensor Data Sheet Description Features The APDS-9900/9901 provides digital ambient light ALS, IR LED and Proximity Detector in an Optical Module sensing (ALS), IR LED and a complete proximity detection Ambient Light Sensing (ALS) system in a single 8 pin package. The proximity function Approximates Human Eye Response offers plug and play detection to 100 mm (without front Programmable Interrupt Function with Upper and glass) thus eliminating the need for factory calibration Lower Threshold of the end equipment or sub-assembly. The proximity Up to 16-Bit Resolution detection feature operates well from bright sunlight to dark rooms. The wide dynamic range also allows for High Sensitivity Operates Behind Darkened Glass operation in short distance detection behind dark glass Up to 1,000,000:1 Dynamic Range such as a cell phone. In addition, an internal state machine Proximity Detection provides the ability to put the device into a low power Fully Calibrated to 100 mm Detection mode in between ALS and proximity measurements Integrated IR LED and Synchronous LED Driver providing very low average power consumption. The ALS Eliminates Factory Calibration of Prox provides a photopic response to light intensity in very low light condition or behind a dark faceplate. Covers a 2000:1 Dynamic Range Programmable Wait Timer The APDS-9900/9901 is particularly useful for display Wait State Power 70 A Typical management with the purpose of extending battery life and providing optimum viewing in diverse lighting con- Programmable from 2.72 ms to > 6 Sec ditions. Display panel and keyboard backlighting can 2 I C Interface Compatible account for up to 30 to 40 percent of total platform power. 2 Up to 400 kHz (I C Fast-Mode) The ALS features are ideal for use in notebook PCs, LCD Dedicated Interrupt Pin monitors, flat-panel televisions, and cell phones. Sleep Mode Power - 2.5 A Typical The proximity function is targeted specifically towards Small Package L3.94 x W2.36 x H1.35 mm near field proximity applications. In cell phones, the proximity detection can detect when the user positions Applications the phone close to their ear. The device is fast enough Cell Phone Backlight Dimming to provide proximity information at a high repetition Cell Phone Touch-screen Disable rate needed when answering a phone call. This provides Notebook/Monitor Security both improved green power saving capability and the added security to lock the computer when the user is not Automatic Speakerphone Enable present. The addition of the micro-optics lenses within Automatic Menu Pop-up the module, provide highly efficient transmission and Digital Camera Eye Sensor reception of infrared energy which lowers overall power dissipation. 8 - VDD 1 - SDA Ordering Information 7 - SCL 2 - INT Part Number Packaging Quantity APDS-9900 Tape & Reel 5000 per reel 6 - GND 3 - LDR APDS-9901 Tape & Reel 5000 per reel 5 - LED A 4 - LED K Functional Block Diagram VDD Interrupt INT Upper Threshold ALS Data ADC SCL Lower Threshold Ch0 Ch1 Upper Threshold SDA Prox Detect Data ADC LED A Lower Threshold Prox IR LED LED Regulated Control Constant Current Logic Sink LED K LDR GND Detailed Description The APDS-9900/9901 light-to-digital device provides The interrupt feature simplifies and improves system on-chip Ch0 and Ch1 diodes, integrating amplifiers, efficiency by eliminating the need to poll a sensor for a ADCs, accumulators, clocks, buffers, comparators, a state light intensity or proximity value. An interrupt is generated 2 machine and an I C interface. Each device combines one when the value of an ALS or proximity conversion exceeds Ch0 photodiode (visible plus infrared) and one Ch1 infra- either an upper or lower threshold. Additionally, a pro- red-responding (IR) photodiode. Two integrating ADCs si- grammable interrupt persistence feature allows the user multaneously convert the amplified photodiode currents to determine how many consecutive exceeded thresholds to a digital value providing up to 16-bits of resolution. are necessary to trigger an interrupt. Interrupt thresholds Upon completion of the conversion cycle, the conversion and persistence settings are configured independently for result is transferred to the Ch0 and CH1 data registers. This both ALS and proximity. digital output can be read by a microprocessor where the Proximity detection is fully provided with an 850 nm IR illuminance (ambient light level) in Lux is derived using an LED. An internal LED driver (LDR) pin, is jumper connected empirical formula to approximate the human eye response. to the LED cathode (LED K) to provide a factory calibrated Communication to the device is accomplished through a proximity of 100 +/- 20 mm. This is accomplished with a 2 fast (up to 400 kHz), two-wire I C serial bus for easy con- proprietary current calibration technique that accounts nection to a microcontroller or embedded controller. The for all variances in silicon, optics, package and most impor- digital output of the APDS-9900/9901 device is inherent- tantly IR LED output power. This will eliminate or greatly ly more immune to noise when compared to an analog reduce the need for factory calibration that is required for interface. most discrete proximity sensor solutions. While the APDS- 9900/9901 is factory calibrated at a given pulse count, The APDS-9900/9901 provides a separate pin for level-style the number of proximity LED pulses can be programmed interrupts. When interrupts are enabled and a pre-set from 1 to 255 pulses, which will allow greater proximity value is exceeded, the interrupt pin is asserted and distances to be achieved. Each pulse has a 16 s period. remains asserted until cleared by the controlling firmware. 2 2 I C Interface