April 25, 2024 
Professional magazine and portal dedicated to electronics 
The SFH 5701 A01 ambient light sensor is Osram Opto Semiconductors’ latest addition to its portfolio for the automotive sector and the company’s first IC-based component for which a separate power supply pin is not required. The ambient light sensor (ALS) is an active component in which the IC is powered by the signal current and is therefore not reliant on an external power supply. It therefore has only two pins instead of three or more, making it much easier to connect and operate. The special filter encapsulation of the SFH 5701 A01 lets mainly green light through and filters out infrared wavelengths very efficiently. This ensures that the surface-mountable component is ideally adapted to the spectral sensitivity of the human eye, which also is most sensitive to light in the green range of the color spectrum. Overall, the sensor detects light in the spectrum between 450 nm and 700 nm – the visible range for the human eye.
SFH 5701 A01 is an analog component with a linear integrated amplifier which supplies a typical signal of 135 µA at 100 lux (more info).
