LX1973AIDU datasheet(3/10 Pages) MICROSEMI

Part #	LX1973AIDU

Description	Automotive Light Sensor

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Manufacturer	MICROSEMI [Microsemi Corporation]

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LX1973A

PRODUCTION DATA SHEET

Microsemi

Analog Mixed Signal Group

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 3

Automotive Light Sensor

TM

®

Copyright

Rev. 1.2, 2009-05-26

ELECTRI CAL CHARACTERISTICS

Unless otherwise specified, the following specifications apply over the operating ambient temperature -40

°C

≤ T

A ≤ 85°C except where

otherwise noted and the following test conditions: See Note 1, VDD =5V.

LX1973A

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

Operational Voltage

VDD

4.5

5.5

V

Supply Current

IDD

EV = 1.0 lux

0.2

0.25

mA

Power Supply Rejection Ratio

PSRR

VRIPPLE = 100mVP-P, f = 10kHz; COUT = 0.1µF

30

35

dB

Peak Spectral Response

λPR

580

nm

Infrared Response

)

(

I

)

(

I

PR

DD

λ

EV(white) = 100 lux, EV(810nm) = 14.6µW/cm

2,

Note 3

-5

1

5

%

Light to Current Gain

GL

See application section for equation

Saturation Current

ISAT

570

µA

Radiant Sensitive Area

0.20

mm

2

Flat Top Package (note 5)

Output Current

IOUT(0.01)

EV = 0.01 lux @ 25°C, Note 1,2

32

36

40

µA

Output Current

IOUT(1.0)

EV = 1.0 lux, Note 1,2

103

114

125

µA

Output Current

IOUT(10)

EV = 10 lux, Note 1,2

183

203

223

Output Current

IOUT(100)

EV = 100 lux, Note 1,2

320

360

400

µA

EV = 0 lux, TA = 20°C, Note 4

450

900

Dark Current (equivalent lux)

IOUT (DARK)

EV = 0 lux, TA = 50°C, Note 4

2100

5000

µLux

1.0 lux to 0.01 lux

1.5

3

sec

Dynamic Response Time

(to 10% settling error point)

TDR

0.01 lux to 1.0 lux

0.2

0.5

sec

Reverse Form Package (note 6)

Output Current

IOUT(0.01)

EV = 0.01 lux @ 25°C, Note 1,2

32

36

40

µA

Output Current

IOUT(1.0)

EV = 1.0 lux, Note 1,2

105

117

128

µA

Output Current

IOUT(10)

EV = 10 lux, Note 1,2,

187

208

229

Output Current

IOUT(100)

EV = 100 lux, Note 1,2

333

370

407

µA

EV = 0 lux, TA = 20°C, Note 4

450

900

µLux

Dark Current (equivalent lux)

IOUT (DARK)

EV = 0 lux, TA = 50°C, Note 4

2100

5000

1.0 lux to 0.01 lux

1.5

3

sec

Dynamic Response Time

(to 10% settling error point)

TDR

0.01 lux to 1.0 lux

0.2

0.5

sec

Notes:

1. The input irradiance is supplied from a point source which is a white light emitting diode (LED); Fairchild Semiconductor part number

MV8W00.

2. See Figure 2.

3. See Figure 3.

4. Dark Current equivalent lux at 0 lux:

)

10

146

(

9

4

−

×

÷

⎥

⎦

⎤

⎢

⎣

⎡

=

REF

OUT

I

EL

5. For Flat Top (DU Package), IREF = 5824µA.

6. For Reverse Form (DR Package): IREF = 5985µA

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