Ambient Light Sensor IC (Under Development)

BU27034ANUC is a digital Ambient Light Sensor IC with I²C bus interface. This IC is most suitable for obtaining ambient light data for adjusting LCD and backlight power of TV and mobile phone. It is capable of detecting a very wide range of illuminance.

The BU27034ANUC is a highly sensitive ambient light sensor designed to accurately measure illuminance across a broad range. Featuring a built-in IR cut filter and two outputs with different spectral responses, it ensures precise light detection even under challenging conditions, such as behind dark windows. Its I²C bus interface supports both 1.2 V and 1.8 V logic levels, enabling flexible integration into various systems. The sensor effectively rejects 50 Hz/60 Hz light noise, ensuring stable readings. With a typical resolution of 0.00006 lx/count at the highest sensitivity setting, BU27034ANUC is ideal for mobile phones, tablet PCs, portable gaming devices, LCD TVs, and digital cameras, helping optimize display brightness and improve power efficiency.

Features 

• Built-in IR Cut Filter
• 2 outputs with Different Spectral Response
• Correspond to Dark Window because of High Sensitivity
• Rejecting 50Hz/60Hz Light Noise
• I²C Bus Interface (f/s mode support)
• Correspond to both 1.2V and 1.8V Logic Interface
• Resolution 0.00006 lx/count (Typ)   

            (In highest gain and longest measurement time setting)

Applications

Mobile Phone, Tablet PC, Note PC, Portable Game Machine, LCD TV, Digital Camera

Key Specifications

• VCC Voltage Range: 1.7 V to 3.6 V
• Illuminance Detection Range: 20 klx (Typ)
• Current Consumption: 120 μA (Typ)
• Power Down Current: 1.0 μA (Typ)
• Operating Temperature Range: -40 °C to +85 °C

Typical Application Circuit 

Block Diagram