BH1751FVI is a digital Ambient Light Sensor IC with I2C bus interface. It is most suitable for obtaining ambient light data to adjust the LCD and keypad backlight power of mobile phones. It can detect a wide range of light intensity with high resolution (1-65535 lx). The features of this product include: I2C bus interface support, spectral responsibility similar to the human eye, conversion of illuminance to digital signal, wide range and high resolution, low power consumption, light noise rejection function for 50Hz/60Hz, 1.8V logic input interface, no need for external parts, minimal light source dependency (e.g. incandescent lamp, fluorescent lamp, etc.), two selectable I2C slave addresses, adjustable measurement result for optical window influence, small measurement variation (+/- 20%), minimal influence from infrared, and built-in power on reset circuit.
The BH1751FVI is a digital ambient light sensor IC with I²C bus interface, designed for mobile phones, LCD displays, cameras and other portable devices. It converts illuminance to a 16‑bit digital output and offers a wide measurement range from 0.11 lx to 100 000 lx.
The note details electrical characteristics, timing diagrams, instruction set, measurement modes, and example application circuits. It also includes ordering information, maximum ratings, and cautions for power‑on reset sequencing.
| Supply Voltage (Vmax) | 45 V |
|---|---|
| Operating Temperature | -40 °C to 85 °C |
| Storage Temperature | -40 °C to 100 °C |
| SDA Sink Current (max) | 7 mA |
| Power Dissipation (max) | 260 mW |
| Typical VCC | 3.0 V |
| Reference Voltage (Iref) | 1.65 V |
| H‑Resolution Mode Resolution | 1 lx |
| L‑Resolution Mode Resolution | 4 lx |
The device uses a 1.8 V logic input interface.
More than 2 ms is required after VCC exceeds 2.0 V for the sensor to become active.
H‑Resolution mode provides a resolution of 1 lx.
The maximum supply voltage rating is 45 V.