Ambient Light Sensor ICs Digital 16bit Serial Output Type Ambient Light Sensor IC No.11046ECT06 BH1715FVC Descriptions 2 BH1715FVC is an digital Ambient Light Sensor IC for I C bus interface. BH1715FVC 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 2 1) I C 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) 2 10) It is possible to select 2 type of I C slave-address. 11) Adjustable measurement result for influence of optical window (It is possible to detect min. 0.23 lx, max. 100000 lx by using this function.) 12) Small measurement variation (+/- 15%) 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 -4085 Storage Temperature Tstg -40100 SDA Sink Current Imax 7 mA Power Dissipation Pd 260 mW 70mm 70mm 1.6mm glass epoxy board. Derating in done at 3.47mW/ for operating above Ta=25. Operating Conditions Ratings Parameter Symbol Units Min. Typ. Max. V Voltage Vcc 2.4 3.0 3.6 V CC 2 I C Reference Voltage V 1.65 V V DVI CC www.rohm.com 2011.11 - Rev.C 1/16 2011 ROHM Co., Ltd. All rights reserved. Technical Note BH1715FVC Electrical Characteristics (V = 3.0V, DVI = 3.0V, Ta = 25, unless otherwise noted) CC Limits Parameter Symbol Units Conditions Min. Typ. Max. 1 Supply Current Icc1 120 190 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 4 lx H-Resolution Mode Measurement Time tHR 120 180 ms L-Resolution Mode Measurement Time tLR 16 24 ms Incandescent rIF 1 times EV = 1000 lx / Fluorescent Sensor out ratio ADDR Input H Voltage VAH 0.7 * V V CC ADDR Input L Voltage VAL 0.3 * V V CC 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, ADDR Input H Current IIH 10 A SCL, SDA, ADDR 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) tHDSTA 0.6 s START Condition 2 I C Set up time for a Repeated tSUSTA 0.6 s START Condition 2 I C Set up time for a Repeated tSUSTD 0.6 s STOP Condition 2 I C Data Hold Time tHDDAT 0 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 10 lx) is need. www.rohm.com 2011.11 - Rev.C 2/16 2011 ROHM Co., Ltd. All rights reserved.