TAOS Inc. is now ams AG The technical content of this TAOS datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: ams sales ams.com Please visit our website at www.ams.com TMD2771 DIGITAL ALS and PROXIMITY MODULE TAOS143B SEPTEMBER 2012 PACKAGE Features MODULE8 Ambient Light Sensing, Proximity (TOP VIEW) Detection, and IR LED in a Single Optical V 1 8 SDA Module DD Ambient Light Sensing (ALS) SCL 2 7 INT Approximates Human Eye Response Programmable Analog Gain GND 3 6 LDR Programmable Integration Time LEDA 4 5 LEDK Programmable Interrupt Function with Upper and Lower Threshold Package Drawing is Not to Scale Up to 16 Bits Resolution 2 Very High Sensitivity Operates Behind I C Interface Compatible 2 Darkened Glass Up to 400 kHz (I C Fast Mode) Up to 1,000,000:1 Dynamic Range Dedicated Interrupt Pin Proximity Detection 3.94 mm 2.4 mm 1.35 mm Package Calibrated to 100-mm Detection Sleep Mode 2.5 A Typical Eliminates Factory Calibration of Prox Programmable Number of IR Pulses Applications Programmable Current Sink for the IR LED No Limiting Resistor Needed Cell Phone Backlight Dimming Programmable Interrupt Function with Cell Phone Touch Screen Disable Upper and Lower Threshold Notebook/Monitor Security Programmable Wait Timer Automatic Speakerphone Enable Wait State 65 A Typical Current Programmable from 2.72 ms Automatic Menu Popup to > 8 Seconds Description The TMD2771 family of devices provides digital ambient light sensing (ALS), a complete proximity detection system, and digital interface logic in a single 8-pin package. The proximity detector includes a digital proximity sensor, LED driver, and IR LED, which are trimmed to eliminate the need for end-equipment calibration due to component variations. Excellent background light rejection allows the device to operate in environments from sunlight to dark rooms. The wide dynamic range allows for operation in short distance detection such as a cell phone (behind dark glass). An internal state machine provides the ability to put the device into a low-power mode in between ALS and proximity measurements, providing very low average power consumption. The device is particularly useful for display management with the purpose of extending battery life and providing optimum viewing in diverse lighting conditions. Display panel and keyboard backlighting can account for up to 30 to 40 percent of total platform power. The ALS features are ideal for use in notebook PCs, LCD monitors, flat-panel televisions, and cell phones. The proximity function specifically targets near-field proximity applications. In cell phones, the proximity detection can detect when the user positions the phone close to their ear. The device is fast enough to provide proximity information at a high repetition rate needed when answering a phone call. This provides both improved green power saving capability and the added security to lock the computer when the user is not present. The addition of the micro-optics lenses within the device, provide highly efficient transmission and reception of infrared energy, which lowers overall power dissipation. The LUMENOLOGY Company Copyright 2012, TAOS Inc. Texas Advanced Optoelectronic Solutions Inc. 1001 Klein Road Suite 300 Plano, TX 75074 (972) 673-0759 www.taosinc.com 1 ams AG Technical content still valid