High-temp option improves IR receiver/sensor reliability

23rd October 2015
Barney Scott

Vishay Intertechnology has introduced an extended temperature option for its TSOP37xxx, TSOP57xxx, and TSSP57xxx series of IR receivers and sensors in the SMT Belobog package. While the standard storage and operating temperature range for Vishay's standard IR receivers is -25 to +85°C, devices with the "E" option feature an extended storage range of -40 to +110°C and extended operating range of 30 to +85°C.

All products in the Belobog series feature a floor life of 168 hours per MSL 3. The standard versions of the TSOP37xxx, TSOP57xxx, and TSSP57xxx IR receivers are designed for remote control applications such as digital still cameras, consumer televisions and STBs.

With the extended storage and operating temperature ranges, the TSOP37xxxE, TSOP57xxxE, and TSSP57xxxE receivers provide a more robust package design for increased reliability in outdoor applications - including parking space sensors, light barrier systems, and in-car entertainment systems - that are exposed to wide daily temperature variations, and temperature extremes in northern and southern geographical locations.

IR receivers in the Belobog package combine an ultra-low 0.8mm profile with a wide 150° angle of sensitivity. The receivers have no lens yet provide on-axis sensitivity equal to any surface-mount IR receiver on the market. At an off-axis angle of 45°, the devices retain 85% of their on-axis sensitivity - much higher than receivers with a lens. To simplify designs, TSOP37xxxE, TSOP57xxxE, and TSSP57xxxE series receivers offer a photo detector and preamplifier circuit in a single epoxy package.

The IR receivers offer a supply voltage from 2.5 to 5.5V, very low supply current down to 0.35mA at 3.3V, and improved immunity against ambient light, and they are insensitive to supply voltage and ripple noise. The receivers are RoHS-compliant, halogen-free, and Vishay Green. TSOP37xxxE and TSOP57xxxE series receivers are offered in four Automatic Gain Control (AGC) versions for short and long burst codes. The devices suppress spurious pulses from energy-saving fluorescent lamps and other continuously transmitted optical noise signals.

Operating at a carrier frequency of 38 kHz, TSSP57xxxE devices are optimised for sensor and proximity sensing applications. Samples and production quantities of the TSOP37xxxE, TSOP57xxxE, and TSSP57xxxE are available now, with lead times of four weeks.

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