Opto-Electronics


Infrared receivers

8 October 2014 Opto-Electronics

Vishay has broadened its optoelectronics portfolio with the release of two new miniaturised infrared (IR) receivers designed specifically for low-speed data transmission. The TSDP34138/56 and TSDP34338/56 are optimised for low-complexity, low-cost signalling in metering, sensor, automation and gaming applications.

Specified for operation from 2,5 V to 5,5 V, with a low 0.35 mA supply current at 3,3 V, the devices each consist of a photodiode and preamplifier assembled on a lead frame. Their epoxy package – measuring 6,0 by 6,9 by 5,6 mm – acts as an IR bandpass filter for use with inexpensive 940 nm IR LEDs.

Using amplitude-shift keyed (ASK), on-off modulated 38,4 kHz or 57,6 kHz signals from an emitter with a 250 mW/sr irradiance, the receivers achieve continuous data transmission up to 7,8 Kbps over a range up to 35 metres. In addition, they provide shielding against EMI, immunity against ambient light, and are insensitive to supply voltage ripple and noise from CFL lamps.



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