TSL245 Datasheet, PDF (1/6 Pages) Texas Instruments – INFRARED LIGHT-TO-FREQUENCY CONVERTER

TSL245
INFRARED LIGHT-TO-FREQUENCY CONVERTER
D High-Resolution Conversion of Light
Intensity to Frequency With No External
Components
D Direct Interface With a Microcontroller
D Compact Three-Leaded Plastic Package
SOES018 – MAY 1995
D Single-Supply Operation Down to 2.7 V
D Nonlinearity Error Typically 0.2% at 100 kHz
D Advanced LinCMOS™ Technology
D Integral Visible-Light Cutoff Filter
description
The TSL245 infrared 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 the output is TTL compatible, it allows direct interface
to a microcontroller or other logic circuitry. The device responds over the infrared light range of 800 nm to
1100 nm. The TSL245 is characterized for operation over the temperature range of – 25°C to 70°C.
The TSL245 is offered in a black, infrared-transmissive package (see Figure 1). 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 (0.030)
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)
5,05 (0.199)
4,55 (0.179)
† _{True position when unit is installed.}
2,74 (0.108)
2,34 (0.092)
NOTE A: All linear dimensions are in millimeters and parenthetically in inches.
Figure 1. TSL245 Packaging Configuration
4,85 (0.191)
4,35 (0.171)
4,35 (0.171)
3,85 (0.152)
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 © 1995, Texas Instruments Incorporated
1