Technical Note
2/20
BH1730FVC
www.rohm.com 2012.02 - Rev.A
© 2012 ROHM Co., Ltd. All rights reserved.
●Electrical Characteristics ( VCC = 3.0V, VDVI = 3.0V, Ta = 25℃, unless otherwise noted )
Parameter Symbol Limits Units Conditions
Min. Typ. Max.
Supply Current Icc1 －150 200 uA
Ev = 100 lx ※
CONTROL register(00h) = ”03h”
and the other registers are default.
Powerdown Current Icc2 －0.85 1.5 uA
No input Light
All registers are default.
Peak Wave Length in Type0 λp0 －600 －nm Visible light response
Peak Wave Length in Type1 λp1 －840 －nm Infrared light response
ADC count value in Type0 D1k_0 1020 1200 1380 count
EV = 1000 lx ※
TIMING register(01h) = “DAh”
GAIN register(07h) = “00h”
ADC count value in Type1 D1k_1 153 180 207 count
EV = 1000 lx ※
TIMING register(01h) = “DAh”
GAIN register(07h) = “00h”
Dark ( 0 lx ) Sensor out in Type0 S0_0 0 0 2 count
No input Light
TIMING register(01h) = “DAh”
GAIN register(07h) = “00h”
Dark ( 0 lx ) Sensor out in Type1 S0_1 0 0 2 count
No input Light
TIMING register(01h) = “DAh”
GAIN register(07h) = “00h”
Gain X1 resolution in Type0 rG1 －0.83 －lx/count TIMING register(01h) = “DAh” ※1
Gain X2 resolution in Type0 rG2 －0.42 －lx/count TIMING register(01h) = “DAh” ※1
Gain X64 resolution in Type0 rG64 －0.014 －lx/count TIMING register(01h) = “DAh” ※1
Gain X128 resolution in Type0 rG128 －0.007 －lx/count TIMING register(01h) = “DAh” ※1
Measurement Time tmt1 －100 150 ms TIMING register(01h) = “DAh”
Incandescent / Fluorescent ratio
by calculating with Type0 and
Type1
rIF －1 －times EV = 1000 lx
INT Output ‘L’ Voltage VINT 0 －0.4 V IINT = 3 mA
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, INT Input ‘H’ Current IIH －－10 µA
SCL, SDA, INT Input ‘L’ Current IIL －－10 µA
I2C SCL Clock Frequency fSCL －－400 kHz
I2C Bus Free Time tBUF 1.3 －－µs
I
C Hold Time ( repeated ) START
Condition tHDSTA 0.6 －－µs
I
C Set up time for a Repeated
START Condition tSUSTA 0.6 －－µs
I
C Set up time for STOP
Condition tSUSTO 0.6 －－µs
I2C Data Hold Time tHDDAT 0 －0.9 µs
I2C Data Setup Time tSUDAT 100 －－ns
I2C ‘L’ Period of the SCL Clock tLOW 1.3 －－µs
I2C ‘H’ Period of the SCL Clock tHIGH 0.6 －－µs
I2C SDA Output ‘L’ Voltage VOL 0 －0.4 V IOL = 3 mA
※1 White LED is used as optical source.
