TSL257 ETC, TSL257 Datasheet

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TSL257

Manufacturer Part Number
TSL257
Description
HIGHSENSITIVITY LIGHTTOVOLTAGE CONVERTER
Manufacturer
ETC
Datasheet

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t
Description
Functional Block Diagram
Terminal Functions
www.taosinc.com
GND
OUT
V
NAME
DD
D
D
D
D
D
D
D
D
TERMINAL
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 M .
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.
Converts Light Intensity to Output Voltage
Monolithic Silicon IC Containing
Photodiode, Operational Amplifier, and
Feedback Components
High Sensitivity
Single Voltage Supply Operation (2.7 V to
5.5 V)
Low Noise (200 Vrms Typ to 1 kHz)
Rail-to-Rail Output
High Power-Supply Rejection (35 dB at
1 kHz)
Compact 3-Leaded Plastic Package
NO.
1
3
2
Ground (substrate). All voltages are referenced to GND.
Output voltage
Supply voltage
Texas Advanced Optoelectronic Solutions Inc.
800 Jupiter Road, Suite 205 S Plano, TX 75074 S (972) 673-0759
t
t
+
DESCRIPTION
DESCRIPTION
Voltage
Output
t
GND
(FRONT VIEW)
PACKAGE
1
V
DD
2
3
OUT
Copyright E 2001, TAOS Inc.
TAOS023A – JULY 2000
1

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TSL257 Summary of contents

Page 1

... 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 M . 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 ...

Page 2

TAOS023A – JULY 2000 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, V (see Note 1) DD Output current ...

Page 3

... NOTE 10: Switching characteristics apply over the range V PARAMETER MEASUREMENT INFORMATION Pulse Generator LED (see Note A) TSL257 TEST CIRCUIT NOTES: A. The input irradiance is supplied by a pulsed InGaN light-emitting diode with the following characteristics: t < < The output waveform is monitored on an oscilloscope with the following characteristics: t www ...

Page 4

TAOS023A – JULY 2000 PHOTODIODE SPECTRAL RESPONSIVITY 1 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 300 500 700 – Wavelength – nm Figure 2 DARK VOLTAGE vs FREE-AIR TEMPERATURE ...

Page 5

... The TSL257 is implemented in a clear 3-leaded package with a molded focusing lens. 0.189 (4,80) 0.173 (4,40) 0.165 (4,20) 0.150 (3,80) 0.079 (2,00) 0.027 (0,70) 0.079 (2,00) NOTES: A. All linear dimensions are in inches (millimeters). B. This drawing is subject to change without notice. C. All dimensions apply before solder dip. D. Package body is a clear nonfilled optically transparent material E ...

Page 6

TAOS023A – JULY 2000 PRODUCTION DATA — information in this document is current at publication date. Products conform to specifications in accordance with the terms of Texas Advanced Optoelectronic Solutions, Inc. standard warranty. Production processing does not necessarily include testing ...

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