General Description
The EAAPMST3923A2 integrates an ambient light sensor (ALS), a proximity sensor (PS), an infrared emitting diode (IRED) driver and an SMBus compatible I2C interface into one chip. The ALS and PS work independently, and communication to the device is accomplished through the fast I2C interface (up to 750 kHz) for easy connection to a microcontroller or embedded controller. A flexible interrupt scheme is provided for minimal microcontroller utilization.

FEATURE
● ALS
   -reading proportional to lux
   -indoor light source flicker noise rejection
   -matching human eye’s response (IR rejection)
   -selectable 50/100/200/400/800 lux range
● PS
   -narrow band IR spectrum (850nm IRED is recommended)
   -programmable IRED intensity
   -100mA or 200mA pulsed driving current
   -various periodic sleep time between each measurement
● Interrupts
   -independent ALS/PS interrupt thresholds
   -adjustable interrupt persistence
● Green Power
   -less than 150μA DC supply current for ALS/PS sensing
   -less than 0.1μA supply current when powered down
● Easy to Use
   -SMBus Compatible I2C interface
   -auto register addressing
   -interrupt pin and flags
● Wide Operating Voltage Range
   -1.7V to 3.6V supply for I2C interface
   -2.3V to 3.6V sensor power supply
● Wide Operating temperature Range
   -40°C to 85°C ambient temperature
● Size
   -3.94mm (L) ×2.36mm (W) ×1.35mm (H)

APPLICATIONs
● Display and keypad dimming adjustment and proximity sensing for:
   -Mobile Devices: smart phone, PDA, GPS
   -Computing Devices: laptop PC, notebook
   -Consumer Devices: LCD-TV, digital picture frame, digital camera
● Industrial and medical light and proximity sensing