ISL29030A datasheet(11/16 Pages) INTERSIL

No. de pieza	ISL29030A

Descripción Electrónicos	Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt

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Fabricante Electrónico	INTERSIL [Intersil Corporation]

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ISL29030A

11

FN7722.0

November 18, 2010

back from within. As a result, the proximity count peaks

at contact and monotonically decreases as skin moves

away. The reflective characteristics of skin are very

different from that of paper.

Typical Circuit

A typical application for the ISL29030A is shown in

Figure 5. The ISL29030A’s I2C address is internally

hardwired as 0b1000100. 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.

(http://www.intersil.com/data/tb/TB477.pdf)

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 ISL29030A 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. A 0.1µF and 1µF power supply decoupling

capacitors need to be placed close to the device.

IALS

1

GND

3

REXT

4

SDA

INT

7

IRDR

8

ISL29030A

R1

10kΩ

R2

10kΩ

REXT

499kΩ

VDD

MICROCONTROLLER

INT

SDA

SLAVE_0

SLAVE_1

I2C SLAVE_n

I2C MASTER

SCL

SDA

SCL

SDA

VI2C_PULL-UP

6

R3

10kΩ

SCL

2

VDD

5

C2

0.1µF

FIGURE 5. ISL29030A TYPICAL CIRCUIT

SCL

C1

1µF

VIR-LED

V

3.5kΩ

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ISL29030A Datasheet(PDF) 11 Page - Intersil Corporation

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