APDS-9003-021 Avago Technologies US Inc., APDS-9003-021 Datasheet - Page 12

• Manufacturer Part Number: APDS-9003-021
• Description: MINIATURE SURFACE-MOUNT AMBIENT LIGHT PHOTO SENSOR
• Manufacturer: Avago Technologies US Inc.

Specifications of APDS-9003-021

• Package: 6Chip LED

Figure 7: Configuration of APDS-9003
Light Source
Appendix C: General Application Guide for APDS-9003
The APDS-9003 is a low cost analog-output ambient light
photo sensor whose spectral response closely emulates
the human eyes. APDS-9003 consists of a photo sensor
that is able to produce a high gain photo current to a
sufficient level that can be converted to voltage with a
standard value of external resistor. APDS-9003 can easily
be integrated into systems that use ADC input which is
available for sampling of the external source, as shown in
figure 7 below.
The amount of converted voltage, Vout, is mainly
dependant proportionally on the photo current which
generated by the brightness of the light shone on the
photo sensor and the load resistor used, R
the brightness of the light or/and the load resistor will
increase the output voltage.
Brightness is measured as “LUX” unit, which describes
how intense a light source that our eyes perceive. LUX
meter is the equipment for “LUX” measurement. Light
sources with the same LUX level appear at the same
brightness to the human eyes.
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.
AV01-0238EN - June 8, 2006
2,3,4,5
APDS-9003
1
Vcc
NC
C
6
L
. Increasing
Vout
RL
A/D
controller
Selection of the load resistor R
of current-to-voltage conversion in the circuit. APDS-
9003 allows a saturation output voltage of typically 2.32V
@ VCC=3V.
Light source e.g. fluorescent light consists of ac noise
frequency of about 100Hz. A capacitor of 10uF, which act
as a low-pass filter, is recommended to add in parallel
with the load resistor to reduce the ripples.
micro-
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L
will determine the amount