ISL29028A Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes
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 540μs
conversion time.
The ISL29028A provides low power operation of ALS and
proximity sensing with a typical 138μA normal operation current
(110μA for sensors and internal circuitry, ~28μA for external LED)
with 220mA current pulses for a net 100μs, repeating every
800ms (or under).
The ISL29028A uses both a hardware pin and software bits to
indicate an interrupt event has occurred. An ALS interrupt is
defined as a measurement which 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 ISL29028A 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 8 lead ODFN package.
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Low Power Ambient Light and Proximity Sensor with Intelligent Interrupt and Sleep Modes |
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[ Display and Keypad Dimming Adjustment and Proximity Sensing for ][ Mobile Devices: Smart Phone, PDA, GPS ][ Computing Devices: Laptop PC, Netbook ][ Consumer Devices: LCD-TV, Digital Picture Frame, Digital Camera ][ Industrial and Medical Light and Proximity Sensing ] |
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Datasheet |
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ESD 、 IPC/JEDEC J STD-020 、 ISO9001 、 Pb-free 、 RoHS |
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Please see the document for details |
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8 Ld ODFN |
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English Chinese Chinese and English Japanese |
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January 29, 2014 |
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FN7721.3 |
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FN7721.3 |
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788 KB |
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