ISL29027 Datasheet, PDF (9/13 Pages) Intersil Corporation – Proximity Sensor with Intelligent Interrupt and Sleep Modes

ISL29027
Typical Circuit
A typical application for the ISL29027 is shown in Figure 6. The
ISL29027’s I²C address is internally hardwired as 0b100010<x>,
with x representing the logic state of input I²C address pin
ADDR0. The device can be tied onto a system’s I²C bus together
with other I²C compliant devices.
Soldering Considerations
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.
Suggested PCB Footprint
It is important that users check the “Surface Mount Assembly
Guidelines for Optical Dual FlatPack No Lead (ODFN) Package”
before starting ODFN product board mounting.
http://www.intersil.com/data/tb/TB477.pdf
Layout Considerations
The ISL29027 is relatively insensitive to layout. Like 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. 0.1µF and 1µF power supply decoupling
capacitors need to be placed close to the device.
V_DD
R1
10kΩ
R2
R3
10kΩ 10kΩ
V_IR-LED
V_{I2C_PULL-UP}
I²C MASTER
MICROCONTROLLER
INT
SDA
SCL
C1
C2
1µF
0.1µF
SLAVE_0
1 _{ADDR0 IRDR} ⁸
2 _VDD
3 _GND
4 _REXT
7
INT
SDA ⁶
5
SCL
REXT ISL29027
499kΩ
SLAVE_1
SDA
SCL
I²C SLAVE_n
SDA
SCL
FIGURE 6. ISL29027 TYPICAL CIRCUIT
9
FN7815.0
February 7, 2011