TSL245 INFRARED LIGHT-TO-FREQUENCY CONVERTER

SOES018 - MAY 1995

features

• High-Resolution Conversion of Light Intensity to Frequency With No External Components
• Direct Interface With a Microcontroller
• Compact Three-Leaded Plastic Package
• Single-Supply Operation Down to 2.7 V
• Nonlinearity Error Typically 0.2% at 100 kHz
• Advanced LinCMOS^TM Technology
• Integral Visible-Light Cutoff Filter

  Advanced LinCMOS is a trademark of Texas Instruments Incorporated.

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).

View more information about generic part numbers:TSL245

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