TSL245R-LF

TSL245R Infrared Light-to-Frequency Converter The TSL245R light-to-frequency converter combines a silicon General Description 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. The TSL245R is characterized for operation over the temperature range of -25C to 70C and is supplied in a 3-lead plastic side-looker package with an integral visible-light cutoff filter and lens. When supplied in the lead (Pb) free package, the devices are RoHS compliant. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of TSL245R, Infrared Light-to-Frequency Converter are listed below: Figure 1: Added Value of Using TSL245R Benefits Features High-Resolution Conversion of Light Intensity to 1M:1 Input Dynamic Range Frequency with no External Components Provides Low Light Level Operation Low Dark Frequency of 0.4 Hz (typical) Provides for High Sensitivity to Detect a Small High Irradiance Responsivity: Change in Light Typically 500Hz/(W/cm2) at 940nm Provides Additional Sensitivity Advantages 2x Gain Lens Enables Infra-Red Sensing Capabilities Spectral Response from 850nm to 1000nm Communicates Directly With a Microcontroller Compact Three-Leaded Plastic Package Integral Visible-Light Cutoff Filter Single-Supply Operation: 2.7V to 5.5V Nonlinearity Error Typically 0.2% at 100kHz Available in Through-Hole and Surface Mount Three-Lead Sidelooker Packages Replacement for TSL245 ams Datasheet Page 1 v1-00 2016-Jul-27 Document FeedbackT S L2 45R G e ne ral D e sc r i ption Functional Block Diagram The functional blocks of this device are shown below: Figure 2: TSL245R Block Diagram Current-to-Frequency Light Photodiode Output Converter Page 2 ams Datasheet Document Feedback v1-00 2016-Jul-27