HDJD-JD02 Avago Technologies US Inc., HDJD-JD02 Datasheet - Page 6

• Manufacturer Part Number: HDJD-JD02
• Description: KIT DEV RGB COLOR SENSOR 16-QFN
• Manufacturer: Avago Technologies US Inc.

Specifications of HDJD-JD02

• Sensor Type: Light, Color Sensor
• Sensing Range: RGB
• Interface: Analog
• Voltage - Supply: 4.5 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: HDJD-S722-QR999
• For Use With/related Products: HDJD-S722-QR999
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Not applicable / Not applicable

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 sensor. 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 reflected as
red. Since any color is uniquely represented by its R,
measures the color of a surface/object by converting the R,
analog voltages. In addition, given that the outputs increase linearly with the intensity of reflected light,
the sensor also measures the reflectivity of a surface/object.
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Figure 3.2 For a given light source, color of reflected light depends on surface/object color.
Figure 3.1 Schematic of reflective color sensor Reflective Sensing Kit (RSK).
G
a
p
G
amplifier
and
sensor
Post-
G
B
and
components, the sensor module effectively
B
components of the reflected light to
VRout
VGout
VBout
Non-emissive
Surface/Object
LED
Color Sensor
Lens
Alignment Gauge