Fairchild Semiconductor International (South Portland, ME) announced its QSB34 PIN photodiode sensor in a large 9mm² surface area with a reception angle of 120°. The packaging creates an integral, transparent, daylight filter that is optimized for reception of 880nm to 940nm wavelength light. The flux response is typically 0.4 A/W at 900nm, and the diode's low, 25pF capacitance and small series resistance typically delivers a rise time and fall time of 20ns. Dynamic signal range is typically 60dB, and the QSB34 also offers very good dc signal linearity and low noise.
The 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.
The 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 5s.
The QSB34 is priced at $0.22 for 1,000-piece quantities. Availability is five weeks lead-time for delivery.
