TSL257

HIGH-SENSITIVITY

LIGHT-TO-VOLTAGE CONVERTER

TAOS023E − SEPTEMBER 2007

1

The LUMENOLOGY r Company

r

r

Copyright E 2007, TAOS Inc.

www.taosinc.com

Photodiode, Operational Amplifier, and

Feedback Components

5.5 V)

1 kHz)

Description

The TSL257 is a high-sensitivity low-noise light-to-voltage optical converter that combines a photodiode and

a transimpedance amplifier on a single monolithic CMOS integrated circuit. Output voltage is directly

proportional to light intensity (irradiance) on the photodiode. The TSL257 has a transimpedance gain of 320 MΩ.

The device has improved offset voltage stability and low power consumption and is supplied in a 3-lead clear

plastic sidelooker package with an integral lens. When supplied in the lead (Pb) free package, the device is

RoHS compliant.

Functional Block Diagram

Voltage

Output

+

−

Available Options

DEVICE

PACKAGE − LEADS

PACKAGE DESIGNATOR ORDERING NUMBER

TSL257

0°C to 70°C

3-lead Sidelooker

S

TSL257

TSL257

0°C to 70°C

3-lead Sidelooker — Lead (Pb) Free

S

TSL257−LF

TSL257

0°C to 70°C

3-lead Surface-Mount Sidelooker — Lead (Pb) Free

SM

TSL257SM−LF

Terminal Functions

TERMINAL

DESCRIPTION

NAME

NO.

DESCRIPTION

GND

1

Ground (substrate). All voltages are referenced to GND.

OUT

3

Output voltage

2

Supply voltage

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