HSDL-3602-008 Avago Technologies US Inc., HSDL-3602-008 Datasheet - Page 27

• Manufacturer Part Number: HSDL-3602-008
• Description: Infrared Transceivers 1m 3V FIR 400units t op options
• Manufacturer: Avago Technologies US Inc.

Specifications of HSDL-3602-008

• Wavelength: 875 nm, 880 nm
• Continual Data Transmission: 4 Mbit/s
• Transmission Distance: 1.5 m
• Radiant Intensity: 250 mW/sr
• Half Intensity Angle Degrees: 30 deg
• Pulse Width: 1.6 us, 4 us
• Maximum Rise Time: 40 ns, 25 ns
• Maximum Fall Time: 40 ns, 25 ns
• Led Supply Voltage: - 0.5 V to 7 V
• Maximum Forward Current: 165 mA
• Operating Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 20 C
• Dimensions: 12.2 mm x 4.9 mm x 4 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

27
Window Material
Almost any plastic material will work as a window mate-
rial. Polycarbonate is recommended. The surface finish
of the plastic should be smooth, without any texture.
An IR filter dye may be used in the window to make it
look black to the eye, but the total optical loss of the
window should be 10 percent or less for best optical
performance. Light loss should be measured at 875 nm.
Shape of the Window
From an optics standpoint, the window should be flat.
This ensures that the window will not alter either the
radiation pattern of the LED, or the receive pattern of
the photodiode.
For product information and a complete list of distributors, please go to our web site:
Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Pte. in the United States and other countries.
Data subject to change. Copyright © 2006 Avago Technologies Pte. All rights reserved.
5988-9347EN - May 30, 2006
Flat Window
(First choice)
HSDL-3602 Flat Window
Curved Front and Back
(Second choice)
HSDL-3602 Curved Window
www.avagotech.com
If the window must be curved for mechanical or in-
dustrial design reasons, place the same curve on the
back side of the window that has an identical radius as
the front side. While this will not completely eliminate
the lens effect of the front curved surface, it will sig-
nificantly reduce the effects. The amount of change in
the radiation pattern is dependent upon the material
chosen for the window, the radius of the front and back
curves, and the distance from the back surface to the
transceiver. Once these items are known, a lens design
can be made which will eliminate the effect of the front
surface curve.
The following drawings show the effects of a curved
window on the radiation pattern. In all cases, the center
thickness of the window is 1.5 mm, the window is made
of polycarbonate plastic, and the distance from the
transceiver to the back surface of the window is 3 mm.
Curved Front, Flat Back
(Do not use)
HSDL-3602 Curved/Flat Window