DATASHEET
ISL29044A FN8419
Rev 3.00
April 28, 2016 Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital
Output Features The ISL29044A 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
micro-controller utilization. Internal LED + Sensor = complete solution Works under all light sources including sunlight Dual ADCs measure ALS/Prox concurrently <1.0ОјA Supply current when powered down For ambient light sensor (ALS) data conversions, an ADC
converts photodiode current (with a light sensitivity range up to
3200Lux) in 100ms per sample. The ADC rejects 50Hz/60Hz
flicker noise caused by artificial light sources. Temperature compensated Pb-Free (RoHS compliant)
Intelligent and Flexible Interrupts For proximity sensor (Prox) data conversions, the built-in driver
turns on an internal 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 547Ојs
conversion time. Independent ALS/Prox interrupt thresholds Adjustable interrupt persistency
-1/4/8/16 consecutive triggers required before interrupt Applications The ISL29044A provides low power operation of ALS and
proximity sensing with a typical 133ОјA normal operation
current (108ОјA for sensors and internal circuitry, ~25ОјA for
LED) with 220mA current pulses for a net 100Ојs, repeating
every 800ms (or under). Display and keypad dimming adjustment and proximity …