Datasheet Ambient light sensor ICs Digital 16bit Serial Output Type Color Sensor IC BH1745NUC General Description Key Specifications BH1745NUC is digital color sensor IC with I2C bus VCC Voltage Range: 2.3V to 3.6V interface. This IC senses Red, Green and Blue light Maximum Sensitivity: 0.005Lx/step (RGB) and converts them to digital values. The high Current Consumption: 130A (Typ) sensitivity, wide dynamic range and excellent Ircut Standby Mode Current: 0.8A (Typ) characteristics makes this IC the most suitable to obtain Operating Temperature Range: -40C to +85C the illuminance and color temperature of ambient light for adjusting LCD backlight of TV, mobile phone and Package(s) W(Typ) x D(Typ) x H(Max) tablet PC. It is possible to detect very wide range light WSON008X2120 2.10mm x 2.00mm x 0.6mm intensity. (0.005 40k lx) Features The Excellent Ircut Characteristics with an Ircut Filter The High Sensitivity and Wide Dynamic Range (0.005 40k lx) Supports Low Transmittance (Dark) Window 2 Correspond to I C Bus Interface ( f/s mode support ) Low Current by Power Down Function Rejecting 50Hz/60Hz Light Noise Correspond to 1.8V Logic Interface Programmable Interrupt Function 2 It is possible to select 2 type of I C bus slave address. (ADDR =L: 0111000, ADDR =H: 0111001) WSON008X2120 Applications LCD TV, Mobile phone, NOTE PC, Tablet PC, Portable game machine, Digital camera, Digital video camera, PDA, LCD display Typical Application Circuits 1.8V 3.6V 2.3V 3.6V (ex. 0.1F) VVCCCC Micro AADDCC AADDCC LLooggiicc SDSDAA Controller SDA or ++ SCSCLL Baseband 22 II CC IInntteerfrfaacece SCL Processor AADDCC 1.65V 5.5V ++ IINNTT IInntteerfrfaacece AADDCC IINNTT INT AADDDDRR AADDCC ADDR TTESTEST TEST OOSCSC POPORR GGNNDD Product structureSilicon monolithic integrated circuit. This product is not designed protection against radioactive rays. This product does not include laser transmitter. This product does not include optical load. This product includes Photo detector, ( Photo Diode ) inside of it www.rohm.com TSZ02201-0M3M0F616080-1-2 2014 ROHM Co., Ltd. All rights reserved. 1/19 TSZ2211114001 23.May.2016 Rev.002 IIRRCCUUTT FFIILLTTERER RREEDD GGRREENEEN BBLLUUEE CCLLEAEARRBH1745NUC Pin Configuration TOP VIEW ADDR NC 1 8 VCC INT 2 7 GND 3 6 SDA TEST 4 5 SCL Pin Description Pin No. Pin Name Function 2 1 ADDR I C bus slave address terminal 2 VCC Power supply terminal 3 GND GND terminal 4 TEST Test terminal. Connect to GND. 2 5 SCL I C bus Interface SCL terminal. 2 6 SDA I C bus Interface SDA terminal. Nch open drain output. 7 INT Interrupt setting is defined by internal register. Register value is 2 possible to configure by I C bus. 8 NC Non connect (Open). Block Diagram VVCCCC AADDCC AADDCC LLooggiicc SDSDAA PD ++ SCSCLL 22 II CC IInntteerfrfaacece AADDCC ++ PD IINNTT IInntteerfrfaacece AADDCC IINNTT PD AADDDDRR AADDCC TTESTEST PD OOSCSC POPORR GGNNDD Description of Blocks Ircut Filter This filter passes visible light and blocks infrared light. RED, GREEN, BLUE, CLEAR Red, Green, Blue, and Clear color pass filter PD Photodiodes (PD) convert light into current. ADC AD converter for obtaining digital 16bit data. 2 ADC Logic + I C Interface + INT Interface 2 ADC control logic and I C bus Interface and Interrupt function Interface. OSC Internal oscillator (typ 720 kHz). It is clock for internal logic. POR Power on reset. All registers are reset after VCC is supplied. www.rohm.com TSZ02201-0M3M0F616080-1-2 2014 ROHM Co., Ltd. All rights reserved. 2/19 TSZ2211115001 23.May.2016 Rev.002 IIRRCCUUTT FFIILLTTERER RREEDD GGRREENEEN BBLLUUEE CCLLEAEARR