SFH7770E6

SFH 7770 E6 Ambient Light and Proximity Sensor 1 Abstract This application note describes technical details and provides some application guidelines for the combined ambient light and proximity sensor SFH 7770 E6. Compared to its predecessors (SFH 7770 E4 and E5), the SFH 7770 E6 features a mores sensitive proximity sensor (up to five times improved sensitivity) and improved ambient light sensor (sensitive down to 0.03 lx). The document starts with a general introduction to the device, followed by a brief overview on the features (Sec. 2) and operating modes (Sec. 3) of the sensor. The integration and operation of the sensor in an I²C bus environment is described in Sec. 4, whereas Sec. 5 covers the interrupt capabilities of the SFH 7770 E6. Sec. 6 provides a functional description of the sensor. Optical design guidelines and application relevant information are given in Sec. 7 followed by the guidelines for the electrical design in Sec. 8. Finally Sec. 9 presents a sample software code. More general information about ambient light sensing, technical data and I²C bus are available in the following documents: - OSRAM OS general application note on ambient light sensing [1] - SFH 7770 E6 datasheet [2] - I²C bus specification [3] - Driving a LED with an external driver (> 200 mA) application note [4] 2 Introduction The SFH 7770 E6 is a compact device which is designed for simultaneous Fig. 1: Ambient Light and Proximity Sensor SFH 7770 E6. detection of ambient light and proxim...