HDJD-JD05 Avago Technologies US Inc., HDJD-JD05 Datasheet - Page 4

• Manufacturer Part Number: HDJD-JD05
• Description: KIT DEV RGB COLOR SENSOR 20-QFN
• Manufacturer: Avago Technologies US Inc.

Specifications of HDJD-JD05

• Sensor Type: Light, Color Sensor
• Sensing Range: RGB
• Interface: 2-Wire Serial
• Voltage - Supply: 2.5 V ~ 3.6 V
• Embedded: No
• Utilized Ic / Part: ADJD-S313-QR999
• For Use With/related Products: ADJD-S313-QR999
• Lead Free Status / RoHS Status: Not applicable / Not applicable

3.0 Color Sensor Module
The color sensor module comprises an illuminant, digital
color sensor and the mechanical block. The Avago white
LED (HSMW-C191) is used as the illuminant/light source
and digital color sensor (ADJD-S313-QR999) as the detec-
tor. The mechanical block not only acts as the casing but
also features an alignment gauge for maintaining an op-
timum gap between sensor and the targeted surface.
The ADJD-S313-QR999 is a cost effective, CMOS digital
output RGB color sensor in miniature surface-mount
package with a mere size of 5x5x0.75mm. The color
sensor’s basic architecture comprises integrated RGB
filters built on a uniformly distributed photodiode array,
a logic control core, and a gain selector with an ADC that
supports digital communication. The uniform RGB filters
and photodiode array minimize the effect of light-gra-
dients caused by optical misalignment and irregularity
of surfaces.
The output allows direct interface to micro-controller or
other logic control for further signal processing without
the need of any additional components. With its wide
sensing range, the sensor can be used for many applica-
tions with different light levels, simply by adjusting the
gain setting. Sensitivity control is performed by the serial
interface and can be optimized individually for the differ-
ent color channel. The integrated ADC helps to remove
unwanted noise caused by analog signal precondition-
ing. Additional features include a selectable sleep mode
to minimize current consumption when the sensor is not
in use. For more details of ADJD-S313-QR999 specifica-
tions, please refer to the datasheet which can be down-
load at www.avagotech.com.
Figure 3.0: ADJD-S313 Spectral Response

0.8
0.6
0.4
0.2
0
1
400
500
Spectral response
Wavelength (nm)
600
700
Reflective Color Sensing Theory of Operation
By definition of reflective sensing, the color sensor
detects light reflected from a surface or an object. The
sensor module is designed in such a way that both the
light source and the color sensor are placed closed to
the target surface/object. Light coming from the LED is
bounced off a surface/object and measured by the sen-
sor. For a given light source, the color of light reflected off
a surface/object is a function of the surface/object color.
For example, white light incident onto a red surface is re-
flected as red. Since any color is uniquely represented by
its R, G and B components, the sensor module effectively
measures the color of a surface/object by converting the
R, G and B components of the reflected light to digital
value. In addition, given that the outputs increase lin-
early with the intensity of reflected light, the sensor also
measures the reflectivity of a surface/ object.
Figure 3.1: For a given light source, the color of reflected depends on surface/
object color