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PDF APDS-9008 Data sheet ( Hoja de datos )
| Número de pieza | APDS-9008 | |
| Descripción | Miniature Surface-Mount Ambient Light Photo Sensor | |
| Fabricantes | AVAGO | |
| Logotipo |  |
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APDS-9008
Miniature Surface-Mount Ambient Light Photo Sensor
Data Sheet
Description
The APDS-9008 is a low cost analog-output ambient
light photo sensor in miniature chipLED lead-free surface
mount package. It consists of a spectrally suited photo
sensor, which provides excellent responsivity that is close
to the response of the human eyes, as show in figure 2.
The APDS-9008 is ideal for applications in which the mea-
surement of ambient light is used to control display back-
lighting. Mobile appliances such as the mobile phones
and PDAs that draw heavy current from display backlight-
ing will benefit from incorporating these photo sensor
products in their designs by reducing power consump-
tion significantly.
Application Support Information
The Application Engineering Group is available to as-
sist you with the application design associated with
APDS-9008 ambient light photo sensor module. You can
contact them through your local sales representatives for
additional details.
www.DataSheet4U.com
Features
• Excellent responsivity
- Close responsivity to the human eye
• Miniature ChipLED Leadfree surface-mount package
Height – 0.55 mm
Width – 1.60 mm
Depth – 1.50 mm
• Low sensitivity variation across various light sources
• Operating temperature : -40°C to 85°C
• Vcc supply 1.6 to 5.5V
• Lead-free package, RoHS compliance
• Output linearity across wide illumination range
• High output saturation voltage
Applications
• Detection of ambient light to control display
backlighting
Mobile devices – Mobile phones, PDAs
Computing devices – Notebooks, Webpads
Consumer devices – TVs, Video Cameras, Digital
Still Camera
• Automatic Residential and Commercial Lighting
Management
• Electronic Signs and Signals
1 page  
1.20
1.10
1.00
0.90
0.80
0.70
0.60
0.50
1.8 2.3 2.8 3.3 3.8 4.3 4.8 5.3
VCC
Figure 8. Relative average Icc Vs Vcc (T=25°C, 100 Lux)
1.40E-06
1.20E-06
1.00E-06
8.00E-07
6.00E-07
4.00E-07
2.00E-07
0.00E+00
-40 -20
0 20 40 60
Temp in Degrees
Figure 9. Dark Current Vs Temp (Vcc=1.8V)
80 100
2.0 R=12k
1.6 R=10k
1.2 R=8.2k
0.8 R=6.8k
0.4 R=4.7k
R=1k
0.0
0 200 400 600 800 1000
LUX
Figure 10. General Luminance Vs Typical Output Voltage
(Vcc=1.8V, T=25°C, Light Source = White LED)
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5
5 Page 
Appendix B. Optical Window Design for APDS-9008
1.0 Optical Window Dimensions
To ensure that the performance of the APDS-9008 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-9008.
This minimum dimension that is recommended will en-
sure 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 cylindrical
piece of transparent plastic, which makes use of total in-
ternal 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 B1 and B2 illustrate the two types of window that
we have recommended which could either be a flat win-
dow or a flat window with light pipe.
Flat
Table 1 and Figure B3 below show the recommended
dimensions of the window. These dimension values are
based on a window thickness of 1.0mm with a refractive
index 1.585.
D1
T
Top View
WD L
D2 D1
Z
APDS-9008
Light Receving Area
Figure B3. Recommended Window Dimensions
WD: Working Distance between window front panel &
APDS-9008
D1: Window Diameter
T: Thickness
L: Length of Light Pipe
D2: Light Pipe Diameter
Z: Distance between window rear panel and
APDS-9008
www.DataSheet4U.com
Figure B1. Window Size Determination for Flat Window
Table 1. Recommended dimension for optical window
All dimensions are in mm
WD
(T+L+Z)
1.5
2.0
2.5
3.0
Flat Window
(L=0.0)
Z D1
0.5 2.25
1.0 3.25
1.5 4.25
2.0 5.00
Flat window
with Light Pipe
(D2=1.5; Z =0.5)
D1 L
--
--
--
2.5 1.5
Figure B2. Window Design of Flat Window with Light Guide
11
The window should be placed directly on top of the photo
sensor to achieve better performance and if a flat window
with a light pipe is used, dimension D2 should be 1.5mm
to optimize the performance of APDS-9008.
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet APDS-9008.PDF ] | |
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