HDJD-JD06 Avago Technologies US Inc., HDJD-JD06 Datasheet - Page 4

• Manufacturer Part Number: HDJD-JD06
• Description: KIT DEV RGB COLOR SENSOR 16-QFN
• Manufacturer: Avago Technologies US Inc.

Specifications of HDJD-JD06

• Sensor Type: Light, Color Sensor
• Sensing Range: RGB
• Interface: Analog
• Voltage - Supply: 4.5 V ~ 5.5 V
• Embedded: No
• Utilized Ic / Part: ADJD-E622-QR999
• For Use With/related Products: ADJD-E622-QR999
• Lead Free Status / RoHS Status: Not applicable / Not applicable

3.0 Color Sensor Module
The color sensor module comprises an illuminant, RGB
color sensor and the mechanical block. The Avago white
LED (HSMW-C191) is used as the illuminant/light source and
RGB color sensor in QFN Package (ADJD-E622-QR999) as the
detector. The mechanical block not only acts as the casing
but also features an alignment gauge for maintaining an
optimum gap between sensor and the targeted surface.
ADJD-E622-QR999 is a high performance, small in size, cost
effective light to voltage converting sensor. The sensor
combines a photodiode array and three transimpedance
amplifiers in a single monolithic CMOS IC solution. With a
Red (R), Green (G) and Blue (B) color filters coated over the
photodiode array, the sensor converts RGB light to analog
voltage outputs, denoted by VROUT, VGOUT and VBOUT,
respectively. The sensor is packaged in a 5x5x0.75 [mm]
surface mount QFN-16 package.
Figure 3.0: Spectral Responsivity and Block Diagram of ADJD-E622-QR999
Avago HSMW-C191 is a small white ChipLED in a standard
footprint (1.6mm x 0.8mm x 0.6mm). The typical luminous
intensity is 200mcd @ 20mA with typical viewing angle at 140
degrees. For more details of ADJD-E622-QR999 and HSMW-
C191 specifications, please refer to the datasheet which can
be download at www.avagotech.com.

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 rep-
resented by its R, G and B components, the sensor module ef-
fectively measures the color of a surface/object by converting
the R, G and B components of the reflected light to analogue
voltages. 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
Transmissive Color Sensing Theory of Operation
By transmissive, it means the application kit is placed facing
the light source being measured. The filter-coated photodi-
ode array of the color sensor converts the R, G, B components
of light falling on it into photocurrent, which is then con-
verted into digital values for each of the primary component.
Given that any colored light is uniquely represented by the
ratio of the primary colors, the color sensor provides a defi-
nite manner of measuring color. In addition, the sensor is also
responsive to light intensity where its outputs increase lin-
early with increasing light intensity. For a given light source,
the application kit can also be used to determine the color
of transparent medium through which the light is passed
before reaching the sensor. For example, the medium could
be glass, plastic or liquid.
Figure 3.2: R, G, B outputs of the sensor is determined by color of light falling on
the sensor