DATASHEET
ISL29027 FN7815
Rev 1.00
February 2, 2012 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. Features 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. Proximity Sensing Works Under All Light Sources Including Sunlight Intelligent Interrupt Scheme Simplifies ОјC Code Proximity Sensor with Broad IR Spectrum
-Can Use 850nm and 950nm External IR LEDs IR LED Driver with I2C Programmable Sink Currents
-Net 100Ојs Pulse with 110mA or 220mA Amplitudes
-Periodic Sleep Time up to 800ms Between Pulses Ambient IR Noise Cancellation (Including Sunlight)
Intelligent and Flexible Interrupts The ISL29027 provides proximity 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).
The ISL29027 uses both a hardware pin and software bits to
indicate an interrupt event has occurred. A proximity interrupt
is defined as a measurement over a threshold limit. The user
may also require that proximity interrupts occur at once, up to …
