The MAX44009 ambient light sensor features an I2C digital output that is ideal for a number of portable applications such as smartphones, notebooks, and industrial sensors. At less than 1μA operating current, it is the lowest power ambient light sensor in the industry and features an ultra-wide 22-bit dynamic range from 0.045 lux to 188,000 lux.
Low-light operation allows easy operation in dark-glass applications.

The on-chip photodiode’s spectral response is optimized to mimic the human eye’s perception of ambient light and incorporates IR and UV blocking capability. The adaptive gain block automatically selects the correct lux range to optimize the counts/lux. The IC is designed to operate from a 1.7V to 3.6V supply voltage range and consumes only 0.65μA in full operation.

• Model: GY-49
• Sensor: Maxim MAX44009
• Detection Range: 0.045 – 188 000 Lux (22-Bit Value)
• Operating Voltage: 1.7 – 3.6VDC
• Operating Current: 0.65uA
• Operating Temperature: -40°C to +85°C
• Communication Interface: I2C
• Unmarked via closest to the “GY-49” label is connected to the INT pin
• The remaining unmarked via is connected to the A0 pin

PIN DESCRIPTION

• VIN-> Supply Voltage (3.3VDC)
• GND-> Ground
• SCL-> I2C Clock
• SDA-> I2C Data
• INT-> Active Low Interrupt Output (External 10k pullup resistor is provided)
• A0-> Address Select – High selects address 1001 011, Low selects address 1001 010

Applications/Uses

• Cellular Phones/Smartphones
• Digital Lighting Management
• Portable Devices
• Security Systems
• Tablet PCs/Notebook Computers
• TVs/Projectors/Displays

1. Datasheet – MAX44009