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 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 540µs conversion time.
The ISL29043 provides low power operation of ALS and proximity sensing with a typical 136µA normal operation current (110µA for sensors and internal circuitry, ~28µA for LED) with 220mA current pulses for a net 100µs, repeating every 800ms (or under).
The ISL29043 uses both a hardware pin and software bits to indicate an interrupt event has occurred. An ALS interrupt is defined as a measurement that is outside a set window. A proximity interrupt is defined as a measurement over a threshold limit. The user may also require that both ALS/Prox interrupts occur at once, up to 16 times in a row before activating the interrupt pin.
The ISL29043 is designed to operate from 2.25V to 3.63V over the -40°C to +85°C ambient temperature range. It is packaged in a clear, lead-free 10 Ld ODFN package.
- 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