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Light-to-Frequency description

Light-to-Frequency (LTF) sensors convert measurements of light intensity to a digital form for direct interfacing to a microcontroller. The output of the device is a square wave or pulse stream the frequency of which is linearly proportional to the light intensity. LTF converters are designed for applications such as ambient light measurement, light absorption/reflection in products such as white goods, photographic equipment, colorimetry, chemical analyzers and display contrast controls. They may be used in any system that requires a wide dynamic range, and/or high resolution digital measurement of light intensity.

Asset Publisher

PartNo Description Supply Voltage

V

Responsivity

Hz/µW/cm²

Max. Output Frequency

MHz

Selectable Sensitivity and Full-Scale Output Frequency

Output Frequency Tolerances

+/- %

Temperature Range

°C

Packages

Remark

Datasheet Demo Buy
TSL235R

Converter sidelooker package

2.7-5.5 625 @ 635 0.5 20 -25 to 70 S Not recommended for new design. Please see Ambient Light Sensors device family.
TSL237

Sidelooker package

2.7-5.5 1200 @ 640 1 20 -40 to 85 S, SM Not recommended for new design. Please see Ambient Light Sensors device family.
TSL237T

High-sensitivity converter low profile 4-lead package

2.7-5.5 1200 @ 640 1 20 -40 to 85 T Not recommended for new design. Please see Ambient Light Sensors device family.
TSL238T

High-sensitivity converter low profile 4-pin package

2.7-5.5 3400 @ 640 1 20 -40 to 85 T Not recommended for new design. Please see Ambient Light Sensors device family.