Digital Proximity Sensor with Interrupt Function

The ISL29021 is an integrated proximity and infrared sensor with a built-in IR LED driver and I2C Interface (SMBus Compatible). This device provides infrared sensing to allow proximity estimation featured with interrupt function.

For infrared and proximity sensing, an internal ADC has been designed based on the charge-balancing A/D conversion technique.

特性 Features

Proximity Sensing

? Ambient IR Cancellation During Proximity Sensing

- Works Under Direct Sunlight

? IR LED Driver with Programmable Source Current

- Adjustable Current Drive from 100mA to 12.5mA

? Programmable LED current Modulation Frequency

? Variable Conversion Resolution up to 16-bits

? Selectable Range (via I2C)

? Works Under Various Light Sources, Including Sunlight

Ideal Spectral Response for Proximity Sensor

? Proximity sensor range from 850nm to 950nm

- Can use either 850nm or 950nm LED solution

Ultra Low Power

? 90μA Max Operating Current

? Software Shutdown and Automatic Shutdown

- 0.5μA Max Shutdown Current

Easy to Use

? I2C (SMBus Compatible) Output

? No Complex Algorithms Needed

? Temperature Compensated

? Small Form Factor

- 8 Ld 2.0mmx2.1mmx0.7mm ODFN Package

Additional Features

? I2C and SMBus Compatible

? 1.7V to 3.63V Supply for I2C Interface

? 2.25V to 3.63V Sensor Power Supply

? Pb-Free (RoHS compliant)

Applications

? Display and Keypad Proximity Sensing for:

- Mobile Devices: Smart Phone, PDA, GPS

- Computing Devices: Notebook PC, Webpad

- Consumer Devices: LCD-TV, Digital Picture Frame, Digital Camera

? Industrial and Medical Proximity Sensing