TMD2772/ TMD2772WA Digital ALS and Proximity Module The TMD2772/TMD2772WA family of devices provides digital General Description ambient light sensing (ALS), a complete proximity detection system, and digital interface logic in a single 8-pin surface mount module. The devices are register-set and pin-compatible with the TMD2771 family of devices and include new and improved ALS and proximity detection features and are available with 25 and 50 fields of view. The ALS enhancements include a reduced-gain mode that extends the operating range in sunlight. Proximity detection includes improved signal-to-noise performance and more accurate factory calibration. A proximity offset register allows compensation for optical system crosstalk between the IR LED and the sensor. To prevent false proximity data measurement readings, a proximity saturation indicator bit signals that the internal analog circuitry has reached saturation. The TMD2772/TMD2772WA ALS is based on the ams patented dual-diode technology that enables accurate results and approximates human eye response to light intensity under a variety of lighting conditions. The proximity detection system includes an LED driver and an IR LED, which are factory trimmed to eliminate the need for end-equipment calibration due to component variations. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of TMD2772/TMD2772WA, Digital ALS and Proximity Module are listed below: Figure 1: Added Value of Using TMD2772/TMD2772WA Benefits Features Ambient light sensing, proximity detection, and IR LED Minimizes board space requirements in a single module Ambient light sensing (ALS) Approximates human eye response over a Wide variety of programmable features which wide variety of lighting conditions. Achieves enable 8,000,000:1 dynamic range with very high accurate sensing behind spectrally dark glass. sensitivity ams Datasheet Page 1 v1-21 2016-Feb-16 Document FeedbackT M D2 77 2/ T M D 2 7 7 2 WA Gen e r a l Des c rip t i o n Benefits Features Eliminates need for customer end-product Proximity detection calibration. Calibrated and trimmed to provide consistent Reduces the proximity noise reading Control of system crosstalk and offset (1) Reduced proximity count variation Prevents false proximity detection in bright (1) Programmable offset light (1) Saturation indicator bit Selectable IR power-level without external Programmable driver for IR LED resistor 16,000:1 dynamic range Enables wide operating range Maskable ALS and proximity interrupt Reduces external processor burden Programmable upper and lower thresholds with persistence filter Power management Programmable average power consumption Enables dynamic power dissipation control Programmable wait time from 2.7 ms to > 8 seconds IC fast mode compatible interface Data rates up to 400 kbit/s Industry standard two-wire interface Input voltage levels compatible with V or 1.8V DD bus Small foot-print module 3.94 mm x 2.36 mm x 1.35 mm package Available with standard 25 (TMD2772) and wide 50 Optimize ambient light sensing angle (TMD2772WA) Note(s): 1. New or Improved feature. Applications The TMD2772 applications include: Display Backlight Control Cell Phone Touch Screen Disable Mechanical Switch Replacement Industrial Process Control Medical Diagnostics Printer Paper Alignment Page 2 ams Datasheet Document Feedback v1-21 2016-Feb-16