Data Sheet

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Optical Sensor
LTR-559ALS-01
1. Description
The LTR-559ALS-01 is an integrated low voltage I
2
C digital light sensor [ALS] and proximity sensor [PS] with built-in emitter,
in a single miniature chipled lead-free surface mount package. This sensor converts light intensity to a digital output signal
capable of direct I
2
C interface. It provides a linear response over a wide dynamic range from 0.01 lux to 64k lux and is well
suited to applications under high ambient brightness. With built-in proximity sensor (emitter and detector), LTR-559ALS-01
offers the feature to detect object at a user configurable distance.
The sensor supports an interrupt feature that removes the need to poll the sensor for a reading which improves system
efficiency. The sensor also supports several features that help to minimize the occurrence of false triggering. This CMOS
design and factory-set one time trimming capability ensure minimal sensor-to-sensor variations for ease of manufacturability
to the end customers.
2. Features
I
2
C interface (Fast Mode @ 400kbit/s)
Ultra-small ChipLED package
Built-in temperature compensation circuit
Low active power consumption with standby mode
Supply voltage range from 2.4V to 3.6V capable of 1.7V logic voltage
Operating temperature range from -30
º
C to +70
º
C
RoHS and Halogen free compliant
Light Sensor
Close to human eye spectral response
Immunity to IR / UV Light Source
Automatically rejects 50 / 60 Hz lightings flicker
6 dynamic range from 0.01 lux to 64k lux
16-bit effective resolution
Proximity Sensor
Built-in LED driver, emitter and detector
Programmable LED drive settings
11-bit effective resolution
High ambient light suppression