Light-to-Frequency banner
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 PartNo
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. TSL235R
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. TSL237
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. TSL237T
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. TSL238T