Date: 10/06/2012

940 nm reflective optical SMD sensor from Vishay offers detection range of 0.2 to 5 mm

Vishay Intertechnology, Inc has introduced a new reflective optical sensor TCNT2000 with transistor output in a miniature SMD package for consumer, industrial, and computer applications.

The TCNT2000 utilized Vishay's 940 nm emitter chip and provides a typical CTR of 4%. The high CTR of the device enables the designers with an option of increasing the detection range, or driving the device at lower drive currents to reduce power consumption without incurring performance losses.

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

Features:
1. Detection range: 0.2 to 5 mm
2. Typical output current under test: 0.8 mA
3. Temperature range: -40 °C to +85 °C
4. SMD package measuring 3.4 x 2.7 x 1.5 mm
5. Lead (Pb)-free reflow solderable according to J-STD-020
6. RoHS-compliant

The TCNT2000 features a construction with its emitting light source and silicon phototransistor detector arranged in the same plane. The sensor's analog output signal is triggered by detection of reflected infrared light from objects 0.2 mm to 5 mm away (within > 20 % of peak collector current). The TCNT2000 offers a built-in daylight blocking filter, which suppresses disturbing ambient light to increase the signal-to-noise ratio, while keeping the maximum spectral sensitivity at the operating wavelength of 940 nm.

TCNT2000 is available in samples and production quantities, with lead times of 8 weeks for large orders.