LS521 datasheet(4/12 Pages) SITI

Il numero della parte	LS521

Spiegazioni elettronici	Tunable illumination sensitivity by an external resistor

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Produttore elettronici	SITI [Silicon Touch Technology Inc.]

Homepage	http://www.siti.com.tw

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LS521

點晶科技股份有限公司

SILICON TOUCH TECHNOLOGY INC.

ILLUMINATION-TO-DIGITAL CONVERTER with SMBUS INTERFACE

Version

：A.002

Page3

ELECTRICAL CHARACTERISTICS (VDD=3V, TA=25℃ if not mentioned )

Item

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

SMBus Output Low Voltage

VOL

IO =10uA

0.01

IO =350uA

0.4

Supply Current

IDD

Power-up,

SMBCLK =VSMBDAT=VDD, Ee =0,

VDD

=3V

0.38

0.43

VDD

=5.5V

0.65

0.75

Power-down,

SMBCLK=VSMBDAT = VDD, Ee =0

VDD

=3V

VDD

=5.5V

Shut-down ADC,

SMBCLK=VSMBDAT =VDD, Ee =0

VDD

=3V

0.33

0.38

VDD

=5.5V

0.6

0.7

High Level Input Current

IIH

VSDA(or VSCL)=VDD

Low Level Input Current

IIL

VSDA(or VSCL)= 0V

-5

DC OPERATING CHARACTERISTICS (VDD=3V, TA=25℃, RL=11.9kΩ, CL=100uF, unless

otherwise noted)

Item

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Full scale ADC count

255

counts

ADC count value

DOUT

Ee =0

counts

Ee =400 lux,

Fluorescent light

(note.1

)

104

125

Illuminance responsivity

Fluorescent light

(note.1)

0.208

0.26

0.312

counts/

lux

NOTE: 1. Using a white LED as the fluorescent light source.

MAXIMUM ILLUMINANCE RANGE SETTING

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