BH1721FVC-TR ROHM

Ambient Light Sensor IC Series Digital 16bit Serial Output Type Ambient Light Sensor IC BH1721FVC No.11046ECT10 Descriptions 2 BH1721FVC is an digital Ambient Light Sensor IC for I C 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 - 65528 lx ). Features 2 1) I C bus Interface ( f / s Mode Support, Slave Address :0100011 ) 2) Spectral responsibility is approximately human eye response 3) Illuminance to Digital Converter 4) Wide range and High resolution. (1 65528 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) Small measurement variation (+/- 15%) 11) Compact surface mount package 1.6 x 1.6 x 0.55 mm Applications Mobile phone, LCD TV, NOTE PC, Portable game machine, Digital camera, Digital video camera, PDA, LCD display Absolute Maximum Ratings Parameter Symbol Limits Units Supply Voltage Vmax 4.5 V Operating Temperature Topr -4085 Storage Temperature Tstg -40100 SDA Sink Current Imax 7 mA Power Dissipation Pd 165 mW 70mm 70mm 1.6mm glass epoxy board. Derating in done at 2.2mW/ for operating above Ta=25. Operating Conditions Parameter Symbol Min. Typ. Max. Units VCC Voltage Vcc 2.4 3.0 3.6 V 2 I C Reference Voltage VDVI 1.65 - VCC V www.rohm.com 1/15 2019. 9 - Rev.C 2011 ROHM Co., Ltd. All rights reserved. BH1721FVC Technical Note Electrical Characteristics ( VCC = 3.0V, DVI = 3.0V, Ta = 25 , unless otherwise noted ) Parameter Symbol Min. Typ. Max. Units Conditions 1 Supply Current Icc1 140 199 A Ev = 100 lx Powerdown Current Icc2 0.01 1.0 A No input Light Peak Wave Length p 560 nm Sensor out / Actual lx Measurement Accuracy S/A 1.02 1.2 1.38 times 1, 2 EV = 1000 lx 3 Dark ( 0 lx ) Sensor out S0 0 0 2 count H-Resolution Mode H-Resolution Mode Resolution rHR 1 lx L-Resolution Mode Resolution rLR 8 lx H-Resolution Mode Measurement Time tHR 120 180 ms L-Resolution Mode Measurement Time tLR 16 24 ms Incandescent / Fluorescent Sensor out ratio rIF 1 times EV = 1000 lx DVI Input L Voltage VDVL 0.4 V SCL, SDA Input H Voltage 1 VIH1 0.7 * DVI V DVI 1.8V SCL, SDA Input H Voltage 2 VIH2 1.26 V 1.65V DVI 1.8V SCL, SDA Input L Voltage 1 VIL1 0.3 * DVI V DVI 1.8V SCL, SDA Input L Voltage 2 VIL2 DVI 1.26 V 1.65V DVI 1.8V SCL, SDA, Input H Current IIH 10 A SCL, SDA, Input L Current IIL 10 A 2 I C SCL Clock Frequency fSCL 400 kHz 2 I C Bus Free Time tBUF 1.3 s 2 I C Hold Time ( repeated ) START Condition tHDSTA 0.6 s 2 I C Set up time for a Repeated START Condition tSUSTA 0.6 s 2 I C Set up time for a Repeated STOP Condition tSUSTO 0.6 s 2 I C Data Hold Time tHDDAT 0 s 2 I C Data Valid Time tVDDAT 0.9 s 2 I C Data Valid Acknowledge Time tVDACK 0.9 s 2 I C Data Setup Time tSUDAT 100 ns 2 I C L Period of the SCL Clock tLOW 1.3 s 2 I C H Period of the SCL Clock tHIGH 0.6 s 2 I C SDA Output L Voltage VOL 0 0.4 V IOL = 3 mA 1 White LED is used as optical source. 2 Measurement Accuracy typical value is possible to change 1 byMeasurement result adjustment functio. 3 Use H-Resolution Mode if dark data ( less than 20 lx ) is need. www.rohm.com 2/15 2019. 9 - Rev.C 2011 ROHM Co., Ltd. All rights reserved.