APDS-9004-020 Avago Technologies US Inc., APDS-9004-020 Datasheet - Page 12

• Manufacturer Part Number: APDS-9004-020
• Description: AMBIENT LIGHT SENSOR 4CHIPLED
• Manufacturer: Avago Technologies US Inc.
• Type: Ambient Light Photo Sensorr

Specifications of APDS-9004-020

• Peak Wavelength: 620 nm
• Maximum Light Current: 370 uA
• Maximum Dark Current: 0.5 uA
• Maximum Rise Time: 0.95 ms
• Maximum Fall Time: 0.8 ms
• Package / Case: 1206
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Product: Ambient Light Sensor
• Package: 4Chip LED
• Rise Time: 950 ns
• Fall Time: 800 ns
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 516-1716-2; APDS-9004-021

Appendix B: Optical Window Design for APDS-9004
Optical Window Dimensions
To ensure that the performance of the APDS-9004 will
not be affected by improper window design, there are
some constraints on the dimensions and design of the
window. There is a constraint on the minimum size of
the window, which is placed in front of the photo light
sensor, so that it will not affect the angular response
of the APDS-9004. This minimum dimension that is
recommended will ensure at least a ±35° light
reception cone.
If a smaller window is required, a light pipe or light
guide can be used. A light pipe or light guide is a
Figure 5(a). Window Size Determination for Flat Window
WD
Figure 6. Recommended Window Dimensions
12
Light Receving Area
D1
APDS-9004
L
Z
APDS-9004
T
Flat
Top View
cylindrical piece of transparent plastic, which makes
use of total internal reflection to focus the light.
The thickness of the window should be kept as
minimum as possible because there is a loss of power
in every optical window of about 8% due to reflection
(4% on each side) and an additional loss of energy in
the plastic material.
Figure 5a and 5b illustrate the two types of window
that we have recommended which could either be a
flat window or a flat window with light pipe.
Figure 5(b). Window Design of Flat Window with Light Guide
D2
D1