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TSL237T Datasheet(PDF) 1 Page - ams AG |
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TSL237T Datasheet(HTML) 1 Page - ams AG |
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1 / 23 page  ams Datasheet Page 1 [v1-01] 2018-Apr-04 Document Feedback TSL237T High-Sensitivity Light-to-Frequency Converter The TSL237 light-to-frequency converter combines a silicon photodiode and a current-to-frequency converter on a single monolithic CMOS integrated circuit. Output is a square wave (50% duty cycle) with frequency directly proportional to light intensity (irradiance) on the photodiode. The digital output allows direct interface to a microcontroller or other logic circuitry. Output enable (OE) places the output in a high-impedance state for multiple-unit sharing of a microcontroller input line. The device has been temperature compensated for the ultraviolet-to-visible light range of 320nm to 700nm and responds over the light range of 320nm to 1050nm. The TSL237 is characterized for operation over the temperature range of -40°C to 85°C and is supplied in a compact 4-lead surface-mount package (T). Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of the TSL237, High Sensitivity Light-to-Frequency Converter, are listed below: Figure 1: Added Value of Using TSL237 • Single-Supply Operation: 2.7V to 5.5V • Stable 200ppm/°C Temperature Coefficient • Communicates Directly with a Microcontroller Benefits Features • High-Resolution Conversion of Light Intensity to Frequency with no External Components • 5M:1 Input Dynamic Range • Provides Low Light Level Operation • Low Dark Frequency of 0.1 Hz (typical), <2Hz at 50°C • Provides for High Sensitivity to Detect a Small Change in Light • High Irradiance Responsivity 1.2kHz/(μW/cm2) @ λp = 640nm • Reduces Board Space Requirements while Simplifying Designs • 2.6mm x 3.8mm 4-lead SMD (T) Package General Description |
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