ISL29125_14 Datasheet, PDF (15/17 Pages) Intersil Corporation – Digital Red, Green and Blue Color Light Sensor with IR Blocking Filter

ISL29125
Layout
The ISL29125 is relatively insensitive to layout. Similar to other
I²C devices, it is intended to provide excellent performance even
in significantly noisy environments. There are only a few
considerations that will ensure best performance.
Route the supply and I²C traces as far as possible from all
sources of noise. Use two power-supply decoupling capacitors,
1µF and 0.1µF, placed close to the device.
Soldering
Convection heating is recommended for reflow soldering;
direct-infrared heating is not recommended. The plastic ODFN
package does not require a custom reflow soldering profile and is
qualified to +260°C. A standard reflow soldering profile with a
+260°C maximum is recommended.
Typical Circuit
A typical application for the ISL29125 is shown in Figure 15. The
ISL29125’s I²C address is internally hard-wired as 1000100. The
device can be tied onto a system’s I²C bus together with other I²C
compliant devices.
Vbus
C1 C2
R1
VDD
SDA
R2 R3 R4
4 SDA
1
VDD
0.11 0.13
1
vdd
scl
6
2
5
SENSOR
intb
3
vss
sda
4
0.24
0.48
FIGURE 16. 6 LD ODFN SENSOR LOCATION OUTLINE
References
[1] Standard illuminants
[2] Planckian locus approximation
[3] CIE 1931 2°, XYZ CMFs modified by Judd (1951) and Vos
(1978)
MCU ^SCL
6 SCL ISL29125 _NC 2
GPIO
5 INT
R1 – 100 Ω
R2 – 2.7kΩ to 10kΩ
R3 – 2.7k Ω to 10kΩ
R4 – 2.7k Ω to 10kΩ
C1 – 1µF
C2 – 0.1µF
GND
3
FIGURE 15. ISL29125 TYPICAL CIRCUIT
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FN8424.2
January 24, 2014