High speed PIN photodiode delivers enhanced sensitivity for visible light
EP&T MagazineElectronics Optoelectronics light optoelectronics photodiode pin sensitivity silicon vishay
VISHAY INTERTECHNOLOGY VEMD2704 high speed silicon PIN photodiode provides enhanced sensitivity for visible light. Offered in a compact 2.0 mm by 1.8 mm by 0.6 mm top-view, surface-mount package with clear epoxy for maximum sensitivity, device provides fast switching times of 70ns and low capacitance of 17.6pF for precise signal detection in wearable devices. With a radiant-sensitive area measuring 1.51mm² — and high radiant sensitivity with a reverse light current of 1.17µA and dark current of 0.03nA —device detects visible and near infrared radiation over a wide spectrum range from 350nm to 1100nm. In wearable devices such as fitness trackers and smartwatches, the photodiode can be used with green LEDs for optical heart rate detection and red LEDs for pulse oximetry applications.