LX1973B datasheet(3/8 Pages) MICROSEMI

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LX1973B

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

Rev. 1.3, 2008-01-11

ELECTRICAL CHA RACTERISTICS

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, ROUT = 10k.

LX1973B

Parameter

Symbol

Test Conditions

Min

Typ Max

Units

Operational Voltage

VDD

4.5

5.5

Supply Current

IDD

@ 1 Lux

0.22

0.27

Power Supply Rejection Ratio

PSRR

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

Peak Spectral Response

580

Infrared Response

)

(

)

(

EV(white) = 100 Lux, EV(810nm) = 14.6µWatt/ cm²,

Note 3

-5

Light to Current Gain

See application section for equation

Saturation Current

ISAT

520

µA

1.0 Lux to 0.01 Lux

0.63

1.25

sec

Dynamic Response Time

(to 10% Settling Error Point)

TDR

0.01 Lux to 1.0 Lux

0.2

0.5

sec

Dome Top Package

Output Current

IOUT(0.01)

EV = 0.01 Lux @ 25°C, Note 1,2

µA

Output Current

IOUT(1.0)

EV = 1.0 Lux, Note 1,2

114

126

139

µA

Output Current

IOUT(10)

EV = 10 Lux, Note 1,2

202

224

246

µA

Output Current

IOUT(100)

EV = 100 Lux, Note 1,2

369

410

451

µA

EV = 0 Lux, TA = 20°C, Note 4

190

380

Dark Current (Equivalent Lux)

IOUT (DARK)

EV = 0 Lux, TA = 50°C, Note 4

700

1400

µLux

Dome Bottom Package

Output Current

IOUT(0.01)

EV = 0.01 Lux @ 25°C, Note 1,2

µA

Output Current

IOUT(1.0)

EV = 1.0 Lux, Note 1,2

112

124

137

µA

Output Current

IOUT(10)

EV = 10 Lux, Note 1,2

201

223

245

µA

Output Current

IOUT(100)

EV = 100 Lux, Note 1,2

365

405

445

µA

EV = 0 Lux, TA = 20°C, Note 4

190

380

Dark Current (Equivalent Lux)

IOUT (DARK)

EV = 0 Lux, TA = 50°C, Note 4

700

1400

µLux

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:

)

(146

REF

OUT

−

⎥

⎦

⎤

⎢

⎣

⎡

For Dome Top Package, IREF = 6446µA.

For Dome Bottom Package, IREF= 6344µA.

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