ISL29021_14 Datasheet, PDF (9/12 Pages) Intersil Corporation – Digital Proximity Sensor with Interrupt Function

ISL29021
Typical Circuit
A typical application for the ISL29021 is shown in Figure 4.
The ISL29021’s I²C address is internally hardwired as
1000100. 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.
IR
PROXIMITY
30ms
1µ
0.4ms
50µ
0.4ms
1mA
IR LED
360 kHz
50mA
FIGURE 3. CURRENT CONSUMPTION FOR EACH INTEGRATION PHASE AND DETECTION CYCLE
2.25V TO 3.63V
R1
10kΩ
R2
R3
10kΩ 10kΩ
1.7V TO 3.63V
I²C MASTER
MICROCONTROLLER
INT
SDA
SCL
SLAVE_0
1 _{VDDD IRDR} 8
2 _VDDA
3 _GND
4
REXT
7
INT
SDA ⁶
5
SCL
REXT ISL29021
499k
SLAVE_1
SDA
SCL
I²C SLAVE_n
SDA
SCL
C1
C2
1µ
0.1µ
FIGURE 4. ISL29021 TYPICAL CIRCUIT
9
FN6732.0
March 3, 2009