TCS3771

COLOR LIGHT-TO-DIGITAL CONVERTER

with PROXIMITY SENSING

TAOS110A − MARCH 2011

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The LUMENOLOGY

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Copyright

E 2011, TAOS Inc.

www.taosinc.com

Features

Detection in a Single Device

− Programmable Analog Gain, Integration

Time, and Interrupt Function with Upper

and Lower Thresholds

− Resolution Up to 16 Bits

− Very High Sensitivity — Ideally Suited for

Operation Behind Dark Glass

− Up to 1,000,000:1 Dynamic Range

− Programmable Number of IR Pulses,

Current Sink for the IR LED — No

Limiting Resistor Needed, and Interrupt

Function with Upper and Lower

Thresholds

− Covers a 2000:1 Dynamic Range

− 65

mA Typical Current

− Wait Timer is Programmable from 2.4 ms

to > 7 Seconds

TCS3x7x Family of Devices

Package

Applications

End Products and Market Segments

Monitors, PMP (Portable Media Payers)

Description

The TCS3771 family of devices provides red, green, blue, and clear (RGBC) light sensing and proximity

detection (when coupled with an external IR LED). They detect light intensity under a variety of lighting

conditions and through a variety of attenuation materials. The proximity detection feature allows a large dynamic

range of operation for use in short distance detection behind dark glass such as in a cell phone or for longer

distance measurements for applications such as presence detection for monitors or laptops. The programmable

proximity detection enables continuous measurements across the entire range. In addition, an internal state

machine provides the ability to put the device into a low power mode in between RGBC and proximity

measurements providing very low average power consumption.

The TCS3771 is directly useful in lighting conditions containing minimal IR content such as LED RGB backlight

control, reflected LED color sampler, or fluorescent light color temperature detector. With the addition of an IR

blocking filter, the device is an excellent ambient light sensor, color temperature monitor, and general purpose

color sensor.

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Texas Advanced Optoelectronic Solutions Inc.

1001 Klein Road

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

PACKAGE FN

DUAL FLAT NO-LEAD

(TOP VIEW)

SCL 2

GND 3

6 SDA

5 INT

4 LDR

Package Drawing Not to Scale