ADPD2211

Data Sheet Low Noise, High Sensitivity Optical Sensor ADPD2211 FEATURES Ultrahigh detectivity photodetector 90 fA/√Hz (typical) ultralow noise floor Signal-to-noise ratio (SNR) near shot noise limit 137 µA (typical) of supply current when active (EE = 0 µW/cm2) 1 µA (typical) of supply current in standby High speed, deep junction photodiode Nominal linear output current: 240 µA (typical) Flexible output configuration Excellent pulse response High ambient light rejection Space-saving, 3 mm × 3 mm LFCSP package APPLICATIONS Heart rate, pulse oximetry monitoring (photoplethysmography) Battery-powered medical sensors Chemical analysis FUNCTIONAL BLOCK DIAGRAM VCC + CURRENT AMPLIFIER – ADPD2211 OUT PWDN GND Figure 1. 13720-001 GENERAL DESCRIPTION The ADPD2211 is an optical sensor optimized for biomedical applications. Very low power consumption and near theoretical signal-to-noise ratio (SNR) are achieved by packaging an ultralow capacitance deep junction silicon photodiode...