TSL257T

TSL257 High-Sensitivity Light-to-Voltage Converter The TSL257 is a high-sensitivity low-noise light-to-voltage General Description optical converter that combines a photodiode and a transimpedance amplifier on a single monolithic CMOS integrated circuit. Output voltage is directly proportional to light intensity (irradiance) on the photodiode. The TSL257 has a transimpedance gain of 320M. The device has improved offset voltage stability and low power consumption and is supplied in a 3-lead clear plastic sidelooker package with an integral lens. When supplied in the lead (Pb) free package, the device is RoHS compliant. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of TSL257, High-Sensitivity Light-to-Voltage Converter are listed below: Figure 1: Added Value of Using TSL257 Benefits Features Enables Extremely Fast Response to Change Single Photo-Diode and Trans Impedance Architecture Enables Fast Response to Visible Light in 160s Output Rise-Time Response Range of 400nm to 700nm Wavelengths High Irradiance Responsivity: Provides for High Sensitivity to Detect a Small 2 Change in Light Typically 1.68V/(W/cm ) at p = 645nm Provides Additional Sensitivity Advantages 2x Gain Lens Provides Full Dynamic Range Rail-To-Rail Output Swing Converts Light Intensity to Output Voltage Monolithic Silicon IC Containing Photodiode, Operational Amplifier, and Feedback Components High Sensitivity Single Voltage Supply Operation (2.7V to 5.5V) Low Noise (200Vrms Typ to 1kHz) High Power-Supply Rejection (35dB at 1kHz) Compact 3-Leaded Plastic Package RoHS Compliant (-LF Package Only) ams Datasheet Page 1 v1-01 2018-May-04 Document FeedbackTS L 2 5 7 Gene ral Des c rip t ion Functional Block Diagram The functional blocks of this device are shown below: Figure 2: TSL257 Block Diagram Voltage Output + Page 2 ams Datasheet Document Feedback v1-01 2018-May-04