2013 / 07 / 02

LTR-559ALS: Integrated Ambient Light, Proximity Sensors and IR LED (3-in-1)



The LTR-559ALS is an integrated low voltage I2C 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 I2C 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 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.
·      I2C 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°C to +70°C
·      RoHS and Halogen free compliant
·      Light Sensor
Ø Close to human eye spectral response
Ø Immunity to IR / UV Light Source
Ø Automatically rejects 50 / 60 Hz lightings flicker
Ø 6 dynamic range from 0.01 lux to 64k lux
Ø 16-bit effective resolution
·      Proximity Sensor
Ø Built-in LED driver, emitter and detector
Ø Programmable LED drive settings
Ø 11-bit effective resolution
Ø High ambient light suppression
·      Mobile Devices: Mobile phone
·      Tablets
·      Computing Devices: Notebook PC, Desktop Monitor
·      Consumer Devices: LCD/PDP TV backlight systems, Cameras, Personal Navigation Device, Digital Photo Frame