Date: 30/11/2010

Infrared receivers from Vishay for remote control systems with high noise immunity

Vishay Intertechnology, Inc. has launched a family of miniaturized automatic gain control category 5 (AGC5) Infrared (IR) receivers for remote control systems. Vishay says it's AGC5 devices are suitable for codes with short bursts and offer excellent noise suppression, resulting in the best receiving distance under noise.

Vishay's AGC5 devices are immune to dimmed LCD backlighting, noise from plasma screens, and any fluorescent lamps and other such optical noise. With an improved immunity against ambient light and insensitivity to supply voltage ripple and noise, the IR receivers are optimized for remote control applications in industrial and consumer applications, including set-top boxes, LCD TVs, and DVD players, where a robust transmission range and a clean signal in the presence of optical noise are extremely important.

Each IR receiver includes a photo detector and preamplifier circuit, mounted within an epoxy-encapsulated module that acts as an IR filter. The AGC5 receivers are specified for operation from 2.5 V to 5.5 V with a minimum irradiance of 0.1 to 0.15 mW/m2, depending on the package. This translates to a transmission range of 45 meters in dark ambients for most standard remote controls. The modules feature a carrier frequency range from 30 kHz to 56 kHz, offer a low 0.35 mA supply current, and comply with RoHS 2002/95/EC and WEEE 2002/96/EC.