BH1750

BH1750

Manufacturer:: ROHM Semiconductor

ROHM BH1750FVI Ambient Light Sensor

Specifications

Product Introduction

BH1750FVI is a 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. 

Features

  • I2C bus Interface ( f / s Mode Support )
  • Illuminance to Digital Converter
  • Wide range and High resolution. ( 1 - 65535 lx )
  • Low Current by power down function
  • 50Hz / 60Hz Light noise reject-function
  • 1.8V Logic input interface
  • No need any external parts
  • Light source dependency is little. ( ex. Incandescent Lamp. Fluorescent Lamp. Halogen Lamp. White LED. Sun Light )
  • Adjustable measurement result for influence of optical window ( It is possible to detect min. 0.11 lx, max. 100000 lx by using this function. )
  • Small measurement variation (+/- 20%)
  • The influence of infrared is very small.

Applications

  • Mobile phone
  • LCD TV
  • NOTE PC
  • Portable game machine
  • Digital camera
  • Digital video camera
  • Car navigation
  • PDA
  • LCD display

Specifications Table

Supply Voltage 4.5 V
Operating Temperature -40 to 85 ℃
Storage Temperature -40 to 100 ℃
SDA Sink Current 7 mA
Power Dissipation 260 mW
VCC Voltage 2.4 to 3.6 V
I2C Reference Voltage 1.65 to VCC V
Supply Current 120 to 190 µA
Powerdown Current 0.01 to 1.0 µA
Peak Wave Length 560 nm
Measurement Accuracy 0.96 to 1.44 times
Dark ( 0 lx ) Sensor out 0 to 3 count
H-Resolution Mode Resolution 1 lx
L-Resolution Mode Resolution 4 lx
H-Resolution Mode Measurement Time 120 to 180 ms
L-Resolution Mode Measurement Time 16 to 24 ms
Incandescent / Fluorescent Sensor out ratio 1 times
ADDR Input 'H' Voltage 0.7 * VCC V
ADDR Input 'L' Voltage 0.3 * VCC V
DVI Input 'L' Voltage 0.4 V
SCL, SDA Input 'H' Voltage 1 0.7 * DVI V
SCL, SDA Input 'H' Voltage 2 1.26 V
SCL, SDA Input 'L' Voltage 1 0.3 * DVI V
SCL, SDA Input 'L' Voltage 2 DVI - 1.26 V
SCL, SDA, ADDR Input 'H' Current 10 µA
SCL, SDA, ADDR Input 'L' Current 10 µA
I2C SCL Clock Frequency 400 kHz
I2C Bus Free Time 1.3 µs
I2C Hold Time ( repeated ) START Condition 0.6 µs
I2C Set up time for a Repeated START Condition 0.6 µs
I2C Set up time for a Repeated STOP Condition 0.6 µs
I2C Data Hold Time 0 to 0.9 µs
I2C Data Setup Time 100 ns
I2C 'L' Period of the SCL Clock 1.3 µs
I2C 'H' Period of the SCL Clock 0.6 µs
I2C SDA Output 'L' Voltage 0 to 0.4 V

To learn more, please download the PDF.

Datasheet: