BH1721FVC

Technical Note

2/15

www.rohm.com

2011.11 - Rev.B

© 2011 ROHM Co., Ltd. All rights reserved.

●

Electrical Characteristics ( VCC = 3.0V, DVI = 3.0V, Ta = 25℃, unless otherwise noted )

Parameter

Symbol

Limits

Units

Conditions

Min.

Typ.

Max.

Supply Current

Icc1

－

140

199

µA

1

Powerdown Current

Icc2

－

0.01

1.0

µA

No input Light

Peak Wave Length

λp

－

560

－

nm

Measurement Accuracy

S/A

1.02

1.2

1.38

times

Sensor out / Actual lx

Dark ( 0 lx ) Sensor out

S0

0

0

2

count

3

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

µA

SCL, SDA, Input ‘L’ Current

IIL

－

－

10

µA

I

fSCL

－

－

400

kHz

I

tBUF

1.3

－

－

µs

I

START Condition

tHDSTA

0.6

－

－

µs

I

for a Repeated START Condition

tSUSTA

0.6

－

－

µs

I

for a Repeated STOP Condition

tSUSTO

0.6

－

－

µs

I

tHDDAT

0

－

－

µs

I

tVDDAT

－

－

0.9

µs

I

tVDACK

－

－

0.9

µs

I

tSUDAT

100

－

－

ns

I

tLOW

1.3

－

－

µs

I

tHIGH

0.6

－

－

µs

I

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' by "Measurement result adjustment function".

※

3 Use H-Resolution Mode if dark data ( less than 20 lx ) is need.