TMD2772

DIGITAL ALS

and PROXIMITY MODULE

TAOS147

E − DECEMBER 2012

1

The LUMENOLOGY

r Company

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Copyright

E 2012, TAOS Inc.

www.taosinc.com

Features

Detection, and IR LED in a Single Module

TMD2771 Series

− Approximates Human Eye Response

− Programmable Analog Gain and

Integration Time

− 8,000,000:1 Dynamic Range

− Very High Sensitivity — Ideally Suited for

Operation Behind Dark Glass

− Reduced Proximity Count Variation

*

− Programmable Offset

*

− Saturation Indicator

*

− Current Sink Driver for IR LED

− 16,000:1 Dynamic Range

− Programmable Upper and Lower

Thresholds with Persistence Filter

− Low Power 2.2

mA Sleep State with User-

Selectable Sleep-After-Interrupt Mode

− 90

mA Wait State with Programmable Wait

Time from 2.7 ms to > 8 seconds

− Data Rates up to 400 kbit/s

or 1.8-V Bus

Applications

End Products and Market Segments

Monitors, and PMP (Portable Media

Players)

Description

The TMD2772 family of devices provides digital 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. 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 ALS is based on the TAOS 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.

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Texas Advanced Optoelectronic Solutions Inc.

1001 Klein Road

S Suite 300 S Plano, TX 75074 S (972) 673-0759

PACKAGE

MODULE−8

(TOP VIEW)

SCL 2

GND 3

LEDA 4

8 SDA

7 INT

6 LDR

5 LEDK

Package Drawing is Not to Scale