Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital Output

The ISL29043 is an integrated ambient and infrared light-to-digital converter with a built-in IR LED and I2C Interface (SMBus Compatible). This device uses two independent ADCs for concurrently measuring ambient light and proximity in parallel. The flexible interrupt scheme is designed for minimal microcontroller utilization.

For ambient light sensor (ALS) data conversions, an ADC converts photodiode current (with a light sensitivity range up to 2000 Lux) in 100ms per sample. The ADC rejects 50Hz/60Hz flicker noise caused by artificial light sources.

Features

• Internal LED + Sensor = Complete Solution

• Works Under All Light Sources Including Sunlight

• Dual ADCs Measure ALS/Prox Concurrently

• <1.0μA Supply Current When Powered Down

• Temperature Compensated

• Pb-Free (RoHS compliant)

Intelligent and Flexible Interrupts

• Independent ALS/Prox Interrupt Thresholds

• Adjustable Interrupt Persistency

- 1/4/8/16 Consecutive Triggers Required Before Interrupt

Applications

• Display and Keypad Dimming Adjustment and Proximity Sensing for:

- Mobile Devices: Smart Phone, PDA, GPS

- Computing Devices: Laptop PC, Netbook, Tablet PC

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

- Industrial and Medical Light and Proximity Sensing