TSL235 Datasheet, PDF (1/6 Pages) Texas Instruments – LIGHT-TO-FREQUENCY CONVERTER

TSL235
LIGHT-TO-FREQUENCY CONVERTER
• High-Resolution Conversion of Light
Intensity to Frequency With No External
Components
• Communicates Directly With a
Microcontroller
• Compact Three-Leaded Clear-Plastic
Package
SOES012 – SEPTEMBER 1994
• Single-Supply Operation Down to 2.7 V
• Nonlinearity Error Typically 0.2% at 100 kHz
• Stable 100 ppm/°C Temperature Coefficient
• Advanced LinCMOS™ Technology
description
The TSL235 light-to-frequency converter combines a silicon photodiode and a current-to-frequency converter
on a single monolithic CMOS integrated circuit. The output is a square wave (50% duty cycle) with frequency
directly proportional to light intensity. Because it is TTL compatible, the output allows direct interface to a
microcontroller or other logic circuitry. The device has been temperature compensated for the ultraviolet-
to-visible light range of 300 nm to 700 nm and responds over the light range of 300 nm to 1100 nm. The TSL235
is characterized for operation over the temperature range of – 25°C to 70°C.
mechanical data
The TSL235 is offered in a clear-plastic three-leaded package. The photodiode area is 1.36 mm² (0.0029 in²).
2,0 (0.079) T.P.†
0,75 (0.030)
0,65 (0.026)
0,635 (0.025)
0,4 (0.016)
1
2,25 (0.089)
1,75 (0.069)
1,25 (0.049)
0,75 (0.029)
Pin 1
Pin 2
Pin 3
GND
VDD
OUT
4,0 (0.157) T.P.†
0,86 (0.034)
0,46 (0.018)
2
3
0,65 (0.026)
0,55 (0.022)
15,7 (0.619)
13,2 (0.520)
4,8 (0.189)
4,4 (0.173)
0,51 (0.02)
0,385 (0.015)
0,75 (0.030) R
0,85 (0.033)
0,35 (0.014)
1
2
2,05 (0.081)
3
1,55 (0.061)
3,05 (0.120)
2,55 (0.100)
1,75 (0.069)
1,25 (0.049)
4,85 (0.191)
4,35 (0.171)
4,35 (0.171)
3,85 (0.152)
5,05 (0.199)
4,55 (0.179)
† _{True position when unit is installed.}
2,74 (0.108)
2,34 (0.092)
ALL LINEAR DIMENSIONS ARE IN MILLIMETERS AND PARENTHETICALLY IN INCHES
Advanced LinCMOS is a trademark of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1994, Texas Instruments Incorporated
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