The LTF sensor performs the functions of light sensing, signal conditioning, and A/D conversion in a single monolithic IC. The LTF device converts light intensity to a digital format for a direct interface to a microcontroller. The output of this device is a square wave or pulse train whose frequency is linearly proportional to light intensity and features a dynamic range of 120dB.
The programmable LTF has an input dynamic range of 160 dB through an adjustable input sensitivity and an output scaling control down to 100x to slow down the cycle period.
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 or any system requiring a wide dynamic range and/or high resolution digital measurement of light intensity.
Advertisement
