DATASHEET
ISL29029
Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and
Sleep Modes
The ISL29029 is an integrated ambient and infrared light-todigital converter with a built-in IR LED driver 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.
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
540Ојs conversion time.
The ISL29029 provides low power operation of ALS and PROX
sensing with a typical 138ОјA normal operation current (110ОјA for
sensors and internal circuitry, ~28ОјA for external LED) with
220mA current pulses for a net 100Ојs, repeating every 800ms
(or under). …
