SY22309AS22-J01

• ALS Channel
•    -Output Count Proportional to Lux
•    -Indoor Light Source Flicker Noise Rejection
•    -Matching Human Eye’s Response (Photopic Vision Curve)
•    -6 Selectable Measurement Ranges
•    -Finest Resolution: Down to 0.0079 lux/counts
•    -Maximum Detection Range 16512 lux
• Clear Channel
•    -Indoor Light Source Flicker Noise Rejection
•    -2 Selectable Measurement Ranges
• Green Power
•    -Less than 110μA Supply Current
•    -Less than 1μA Supply Current When Powered Down
• Easy to Use
•    -SMBus Compatible I²C Interface
•    -Temperature Compensation
• Wide Operating Voltage Range
•    -1.7V to 3.6V Supply for I²C Interface
•    -2.3V to 3.6V Supply for Sensor 
• Wide Operating Temperature Range
•    --40°C to +85°C Ambient Temperature

The SY22309AS22-J01 device, an ambient light sensor (ALS) with clear channel, features high sensitivity, wide dynamic range and fast communication speed through I²C interface.

The SY22309AS22-J01 has 2 photodiode arrays. ALS PD is to sense visible light which includes 6 sensitive ranges and Clear PD is to sense visible and infrared which includes 2 sensitive ranges. ALS channel reading (digital count) is proportional to the illuminance regardless of the light sources while Clear channel reading is related to light source due to its full spectrum response; furthermore, no extra data manipulation is required. It also has a built-in circuit to reject the 50Hz/60Hz flicker noise caused by indoor light sources. Due to a well-engineered optical coating on the top of the ALS PD, its spectral response is almost the same as human eye’s photopic vision. Thus, system can tell the external light source type by checking the ratio of Clear/ALS channel data, then different preset correction coefficient can be chosen to adapt to different light sources.

The SY22309AS22-J01 is available in a small SMD L2.0mm×W1.5mm×H0.6mm package.