LX1972

Microsemi

Integrated Products Division

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

Page 4

Ambient Light Detector

Copyright

© 2004

Rev. 1.1b, 2005-10-31

TM

®

ELECTRICAL CHA RACTERISTICS

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

°C

LX1972

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

RESPONSE

Peak Spectral Response

520

nm

Infrared Response

)

(

I

)

(

I

PR

DD

DD

λ

λ

change with additional direct light input of

292

5

1

5

%

1.2

1.4

1.8

2.1

Minimum Operational Voltage

2.2

2.6

V

7.5

10

12.5

75

100

125

Light Current

150

200

250

μA

Gain Linearity

14.6

-15

15

%

0.010

50

Dark Current

2

200

nA

Power Supply Rejection Ratio

PSRR

-25

dB

Radiant Sensitive Area

0.04

mm

2

Notes:

1.

peak

λ = 550nm.

2.

See Figure 1.

3.

See Figure 2.

TE ST CI RCUIT S

LX1972

V

SS

V

DD

White

LED

10k

Ω

Figure 1 –

Operational Voltage Measurement Circuit

LX1972

V

SS

V

DD

White

LED

910nm

10k

Ω

Figure 2 –

IR Sensitivity Measurement Circuit