TSL245R

INFRARED LIGHT-TO-FREQUENCY CONVERTER

TAOS060D − SEPTEMBER 2007

1

The LUMENOLOGY r Company

r

r

Copyright E 2007, TAOS Inc.

www.taosinc.com

Intensity to Frequency With No External

Components

Microcontroller

Mount Three-Lead Sidelooker Packages

Description

The TSL245R light-to-frequency converter combines a silicon photodiode and a current-to-frequency converter

on a single monolithic CMOS integrated circuit. Output is a square wave (50% duty cycle) with frequency directly

proportional to light intensity (irradiance) on the photodiode. The digital output allows direct interface to a

microcontroller or other logic circuitry. The TSL245R is characterized for operation over the temperature range

of −25°C to 70°C and is supplied in a 3-lead plastic side-looker package with an integral visible-light cutoff filter

and lens. When supplied in the lead (Pb) free package, the devices are RoHS compliant.

Functional Block Diagram

Light

Current-to-Frequency

Converter

Photodiode

Output

Available Options

DEVICE

PACKAGE − LEADS

PACKAGE DESIGNATOR ORDERING NUMBER

TSL245R −25°C to 70°

3-lead Sidelooker

S

TSL245R

TSL245R −25°C to 70°

3-lead Sidelooker — Lead (Pb) Free

S

TSL245R−LF

TSL245R −25°C to 70°

3-lead Surface Mount Sidelooker

SM

TSL245RSM

TSL245R −25°C to 70°

3-lead Surface Mount Side-Looker — Lead (Pb)

Free

SM

TSL245RSM−LF

r

r

Texas Advanced Optoelectronic Solutions Inc.

1001 Klein Road S Suite 300 S Plano, TX 75074 S (972) 673-0759

PACKAGE S

SIDELOOKER

(FRONT VIEW)

1

GND

2

3

OUT

PACKAGE SM

SURFACE MOUNT

SIDELOOKER

(FRONT VIEW)

1

GND

2

3

OUT