ROHM BH1751FVI Data Sheet
Summary
This digital Ambient Light Sensor IC is designed to accurately measure ambient light levels across a wide range (1-65535 lx). Featuring an I2C bus interface and high resolution, it is ideal for devices requiring dynamic power adjustment, such as measuring natural daylight or various indoor sources. The manual provides detailed technical specifications, operational data, and application guidance for integrating this sensor into mobile phones, LCD TVs, PCs, and digital cameras to optimize backlight power and display performance.
Page 1 Text Content
Ambient Light Sensor IC Series
Digital 16bit Serial Output Type Ambient Light Sensor IC
BH1751FVI No.11046EBT09
●Descriptions BH1751FVI is an digital Ambient Light Sensor IC for I2C bus interface. This IC is the most suitable to obtain the ambient light data for adjusting LCD and Keypad backlight power of Mobile phone. It is possible to detect wide range at High resolution. ( 1 - 65535 lx ).
●Features 1) I2C bus Interface (f / s Mode Support) 2) Spectral responsibility is approximately human eye response 3) Illuminance to Digital Converter 4) Wide range and High resolution. (1 - 65535 lx) 5) Low Current by power down function 6) 50Hz / 60Hz Light noise reject-function 7) 1.8V Logic input interface 8) No need any external parts 9) Light source dependency is little. (ex. Incandescent Lamp. Fluorescent Lamp. Halogen Lamp. White LED. Sun Light ) 10) It is possible to select 2 type of I2C slave-address. 11) Adjustable measurement result for influence of optical window ( It is possible to detect min. 0.11 lx, max. 100000 lx by using this function. ) 12) Small measurement variation (+/- 20%) 13) The influence of infrared is very small. 14) Build in power on reset circuit
●Applications Mobile phone, LCD TV, NOTE PC, Portable game machine, Digital camera, Digital video camera, PDA, LCD display
●Absolute Maximum Ratings
Parameter Symbol Ratings Units
Supply Voltage Vmax 4.5 V
Operating Temperature Topr -40～85 ℃
Storage Temperature Tstg -40～100 ℃
SDA Sink Current Imax 7 m A
Power Dissipation Pd 260※ m W ※ 70mm × 70mm × 1.6mm glass epoxy board. Derating in done at 3.47m W/℃ for operating above Ta=25℃.
●Operating Conditions
Ratings
Parameter Symbol Units
Min. Typ. Max.
VCC Voltage Vcc 2.4 3.0 3.6 V
I2C Reference Voltage VDVI 1.65 - VCC V
1/16 www.rohm.com 2011.11 - Rev.B
© 2011 ROHM Co., Ltd. All rights reserved.
Page Summary Contents For ROHM BH1751FVI Data Sheet
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 17 |
| File Size | 451.01 KB |
| Published | July 12, 2026 |
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Frequently Asked Questions
What is the measurable ambient light range for this sensor?
It has a wide detection range, capable of measuring from min. 0.11 lx up to max. 100,000 lx.
What interface protocol does the BH1751FVI use?
It utilizes an I²C bus interface and supports 'f/s' mode for reliable data retrieval.
How can I optimize measurement accuracy in low light environments?
The manual recommends using the H-Resolution Mode when needing to detect dark data (less than 10 lx).
Is this sensor designed for power efficiency?
Yes, it incorporates a low current by power down function, with a typical powerdown current drawing between 0.85 and 1.5 µA.