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LX1973BIPL-TR

Description
Photo Diode
CategoryLED optoelectronic/LED    photoelectric   
File Size241KB,8 Pages
ManufacturerMicrosemi
Websitehttps://www.microsemi.com
Environmental Compliance
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LX1973BIPL-TR Overview

Photo Diode

LX1973BIPL-TR Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerMicrosemi
Reach Compliance Codecompliant
Installation featuresSURFACE MOUNT
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
surface mountYES
Base Number Matches1
LX1973B
TM
®
Automotive Light Sensor
P
RODUCTION
D
ATA
S
HEET
DESCRIPTION
KEY FEATURES
Nearly Perfect
Best Eye™
Human Eye Spectral Response
Dark Current < 0.0005 Lux (@
25°C)
5 Decades Compressed Output
10% Accuracy Over
Temperature
Scalable Output Voltage
No Optical Filters Needed
The LX1973B is a wide dynamic
range light sensor with a very low
dark current that is optimized for
sensing low level light signals that
typically occur under dark or darkening
outdoor ambient lighting.
The LX1973B has been optimized
for automotive systems such as
headlamp brightness control or rear
view mirror contrast control. Its
radical (fractional exponent) response
when interfaced with an 8 bit DAC
can detect levels down to 0.001 Lux
or levels as high as 500 Lux.
The spectral response of the
integrated light sensor closely
emulates the human eye so it ignores
light such as infrared which emits
energy but doesn’t aid vision. This
eliminates the need for an Infrared
filter required with competitor’s light
sensors.
The LX1973B internal circuitry
consists of a diode array with
Microsemi’s
Best Eye™
processing that
provides a nearly perfect photopic light
wavelength response curve. The sensor
output feeds into a wide dynamic range
compression amplifier that provides
accurate resolution over five decades of
ambient light. The integrated dark
current cancellation circuit facilitates
accurate sensing of light below 0.01
Lux. The current source output of the
LX1973B can be gain scaled using one
external resistor.
The LX1973B is internally trimmed
to an initial accuracy of 5% at room
temperature and a light level of 10 Lux.
Accuracy of 10% is maintained over the
full temperature range (-40 to +85ºC).
WWW .
Microsemi
.C
OM
APPLICATIONS
Auto Headlamp Control
Auto Mirror Contrast Control
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
Protected By US Patents: 6,787,757; Patents Pending
PRODUCT HIGHLIGHT
LX 1973B Response
5V
4
3
LX1973B
Part
VOUT
R
LOAD
Output (volts)
2
1
0
0.001
0.01
0 .1
1
10
100
LX1973B
LX1973B
A m b ien t L ig h t (lu x )
PACKAGE ORDER INFO
T
A
(°C)
-40 to 85
PL
Plastic MSOP Domed
8-Pin
LX1973BIPL
PR
Plastic MSOP Domed
8-Pin Reverse Form
LX1973BIPR
RoHS Compliant / Pb-free, NiPdAu Finish
RoHS Compliant / Pb-free, NiPdAu Finish
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1973BIPL-
xxxxx-TR)
Copyright
©
2007
Rev. 1.3, 2008-01-11
Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1

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