September 15, Fairchild Semiconductor announces its QSB34, offering excellent design flexibility by providing a broad range of high-performance features and specifications in compact, surface-mount packaging. The PIN photodiode sensor has a large surface area of 9mm2 (3mm X 3mm) and a reception angle of 120°. Its packaging creates an integral, transparent daylight filter that is optimized for reception of 880 to 940nm wavelength light. These features provide outstanding sensitivity and reception and, even with the filter, the flux response is typically 0.4 A/W at 900nm.
The diode's low, 25pF capacitance and small series resistance typically delivers a rise time (tr) and fall time (tf) of 20ns. Dynamic signal range is typically 60dB, and the QSB34 also offers very good dc signal linearity and low noise.
Fairchild's QSB34 features a low profile (1.25mm height from mounting surface), and is available in two surface mount configurations: gull wing (QSB34GR) for top side mounting, and reversed X-Bend (QSB34ZR) for under board mounting. The flat, low-profile package of the QSB34GR makes it well suited for use with an auxiliary lens for focused image sensing. Additionally, the QSB34ZR can be mounted on the rear of the PCB allowing for inclusion of a screen for EMI shielding.
Fairchild's QSB34 comes in lead-free packaging that meets or exceeds the requirements of the joint IPC/JEDEC standard J-STD-020B and is compliant with the European Union requirements, which will take effect in 2005. Both configurations of this product are available in tape and reel quantities of 1,000 units and can sustain an IR reflow temperature of 240?C for a maximum of 5 seconds.
The QSB34 further expands Fairchild's product offerings for motion and speed control including IR emitters/detectors, reflective/transmissive sensors, and LEDs.Price: US $0.22 (1,000 pcs)
For more information about this product go to www.fairchildsemi.com/pf/QS/QSB34.html.
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