Compact SMD IR Receiver from Vishay

In mid- to long-range reflective sensor systems and IR light barrier systems, such as garage door openers, urinals, and other presence of object systems, gain control must be handled differently than in remote applications. In remote applications, the automatic gain control (AGC) adjusts the gain in response to ambient light levels, spurious noise, and other criteria in order for the receiver to continue responding to the data signal while rejecting stray noise. But variable gain is not desired in sensor applications, as this greatly complicates the design. In addition, sensor applications require fast reaction times in order to operate at a continuous 38-kHz signal.

The TSOP5038 solves both of these problems by offering a high fixed gain in all ambient light environments, and allows a short burst repetition time that results in a fast 300-µs reaction time. Continuous signals at 38 kHz or 38 kHz bursts may be used to drive the IR emitter. To simplify the design, an internal IR filter suppresses visible light.

To further simplify designs, the TSOP5038 features a photo detector and preamplifier in one package. The highly sensitive device offers a 0.5-mW/sqm typical irradiance and a supply voltage from 2.7 V to 5.5 V. The receiver is complaint with RoHS 2002/95/EC and WEEE 2002/96/EC.