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Reflective optical sensor detects from 0.2 to 5mm

Posted: 13 Jun 2012 ?? ?Print Version ?Bookmark and Share

Keywords:optical sensor? TCNT2000? optical encoding?

Vishay Intertechnology Inc. has unveiled the TCNT2000 reflective optical sensor. The detection range of the device is 0.2 to 5mm, and it provides a typical CTR of 4 percent, giving designers the option of increasing the detection range, or driving the device at lower drive currents to reduce power consumption without incurring performance losses.

Packed in a 3.4 x 2.7 x 1.5mm SMD package, the TCNT2000 is constructed with its emitting light source and silicon phototransistor detector arranged on the same plane. The sensor's analog output signal is triggered by detection of reflected infrared light from objects 0.2mm to 5mm away (within greater than 20 percent of peak collector current). The TCNT2000 offers a built-in daylight blocking filter, which greatly suppresses disturbing ambient light to increase the SNR, while keeping the maximum spectral sensitivity at the operating wavelength of 940nm.

The TCNT2000 is suited for optical encoding and switching in industrial metering systems, computer disk drives and consumer devices such as DVD players. It also serves as a position sensor for shaft encoders and is suitable for office equipment such as copy machines, printers, and fax machines.

The TCNT2000 offers a typical output current under test of 0.8mA. The sensor operates over a temperature range of -40C to +85C and is Pb-free reflow solderable according to J-STD-020 profile.

Samples and production quantities of the RoHS-compliant TCNT2000 are available now, with lead times of eight weeks for larger orders.

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