Proximity Sensor with Intelligent Interrupt and Sleep Modes

The ISL29027 is an integrated infrared light-to-digital converter with a built-in IR LED driver and I2C Interface (SMBus Compatible). The flexible interrupt scheme is designed for minimal microcontroller utilization.
For proximity sensor (Prox) data conversions, the built-in driver turns on an external infrared LED and the proximity sensor ADC converts the reflected IR intensity to digital. This ADC rejects ambient IR noise (such as sunlight) and has a 540μs conversion time.

Features
• Works Under All Light Sources Including Sunlight
• Intelligent Interrupt Scheme Simplifies μC Code

Proximity Sensing
• Proximity Sensor with Broad IR Spectrum
    - Can Use 850nm and 950nm External IR LEDs
• IR LED Driver with I2C Programmable Sink Currents
    - Net 100μs Pulse with 110mA or 220mA Amplitudes
    - Periodic Sleep Time up to 800ms Between Pulses
• Ambient IR Noise Cancellation (Including Sunlight)

Intelligent and Flexible Interrupts
• Proximity Interrupt Thresholds
• Adjustable Interrupt Persistency
    - 1/4/8/16 Consecutive Triggers Required Before Interrupt

Ultra Low Power
• 138μA DC Typical Supply Current for Prox Sensing
    - 110μA for Sensors and Internal Circuitry
    - 28μA Typical Current for External IR LED (Assuming 220mA for 100μs Every 800ms)
• <1.0μA Supply Current When Powered Down

Easy to Use
• Set Registers; Wait for Interrupt
• I2C (SMBus Compatible) Output
• Temperature Compensated
• Tiny ODFN8 2.0x2.1x0.7 (mm) Package

Additional Features
• 1.7V to 3.63V Supply for I2C Interface
• 2.25V to 3.63V Sensor Power Supply
• Pb-Free (RoHS Compliant)
• I2C Address Selection Pin

Applications
- Mobile Devices: Smart Phone, PDA, GPS
- Computing Devices: Laptop PC, Netbook
- Consumer Devices: LCD-TV, Digital Picture Frame, Digital Camera