link to page 12 link to page 17 TSL257High-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 320MΩ. 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 TSL257BenefitsFeatures• Enables Extremely Fast Response to Change • Single Photo-Diode and Trans Impedance Architecture • Enables Fast Response to Visible Light in • 160μs Output Rise-Time Response Range of 400nm to 700nm Wavelengths • Provides for High Sensitivity to Detect a Small • High Irradiance Responsivity: Change in Light Typically 1.68V/(μW/cm2) at λp = 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 (200μVrms Typ to 1kHz) • High Power-Supply Rejection (35dB at 1kHz) • Compact 3-Leaded Plastic Package • RoHS Compliant (-LF Package Only) ams DatasheetPage 1 [v1-01] 2018-May-04 Document Feedback Document Outline General Description Key Benefits & Features Functional Block Diagram Pin Assignment Absolute Maximum Ratings Electrical Characteristics Operating Conditions Parameter Measurement Information Typical Operating Characteristics Package Mechanical Data Plastic Single-In-Line Side-Looker Package Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information Content Guide
