LX1973BIPR MICROSEMI, LX1973BIPR Datasheet

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LX1973BIPR

Manufacturer Part Number
LX1973BIPR
Description
Manufacturer
MICROSEMI
Datasheet

Specifications of LX1973BIPR

Lead Free Status / RoHS Status
Compliant
Copyright © 2007
Rev. 1.3, 2008-01-11
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.
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.
integrated
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.
IMPORTANT: For the most current data, consult MICROSEMI’s website:
Protected By US Patents: 6,787,757; Patents Pending
LX1973B
The LX1973B is a wide dynamic
The LX1973B has been optimized
The
TM
spectral response of
light
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1973BIPL-
xxxxx-TR)
-40 to 85
Part
sensor
T
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
5V
A
(°C)
D E S C R I P T I O N
closely
PL
RoHS Compliant / Pb-free, NiPdAu Finish
the
R
consists
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.
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).
LOAD
Plastic MSOP Domed
8-Pin
The
The LX1973B is internally trimmed
LX1973BIPL
VOUT
P R O D U C T H I G H L I G H T
P A C K A G E O R D E R I N F O
Analog Mixed Signal Group
LX1973B
of
®
Microsemi
http://www.microsemi.com
a
diode
internal circuitry
array
4
3
2
1
0
PR
0.001
RoHS Compliant / Pb-free, NiPdAu Finish
Automotive Light Sensor
with
P
Plastic MSOP Domed
8-Pin Reverse Form
RODUCTION
0.01
A m b ien t L ig h t (lu x )
LX1973BIPR
L X 1 9 7 3 B R e s p o n s e
0 .1
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
Auto Headlamp Control
Auto Mirror Contrast Control
D
ATA
K E Y F E A T U R E S
A P P L I C A T I O N S
1
S
HEET
10
LX1973B
100
Page 1

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LX1973BIPR Summary of contents

Page 1

... Nearly Perfect Best Eye™ with 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 Auto Headlamp Control Auto Mirror Contrast Control 0. 100 ien ( Plastic MSOP Domed 8-Pin Reverse Form LX1973BIPR Page 1 ...

Page 2

... Description V DD OUT GND LX1973BIPL Microsemi Analog Mixed Signal Group LX1973B RODUCTION ATA HEET OUT PL P ACKAGES (Top View ACKAGE ARKING (Bottom View ACKAGE ARKING (Top View OUT PR P ACKAGES (Bottom View) NC – No Connection MSL3/240°C/168 Hours LX1973BIPR OUT OUT Page 2 ...

Page 3

... A 4 ⎡ ⎤ I − = ÷ × 9 OUT ⎢ ⎥ EL (146 10 ) ⎣ I ⎦ REF Microsemi Analog Mixed Signal Group LX1973B RODUCTION ATA HEET ≤ T 85°C except where otherwise noted and the A LX1973B Min Typ Max 4.5 5.5 0.22 0.27 = 0.1µF ...

Page 4

... Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Automotive Light Sensor ® White V OUT LED R LOAD Figure 3 – IR Sensitivity Measurement Circuit Part LX1973B 10K 5V 2.5V BRT Headlamp Controller Figure 4 – Typical Application Microsemi Analog Mixed Signal Group LX1973B RODUCTION ATA HEET Part OUT GND R LOAD 810nm LX1973B 1µF HI ...

Page 5

... Lux from a white LED point source. AMBIENT Copyright © 2007 Rev. 1.3, 2008-01-11 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Automotive Light Sensor ® 0.25 AMBIENT Microsemi Analog Mixed Signal Group LX1973B RODUCTION ATA HEET Page 5 ...

Page 6

... Human Eye 5. 800 1000 I Iout @ 4.5V Iout @ 5.0V Iout @ 5. 100 Load =10k and 0µF; Photo Step = Direct Light Input of 1 Lux to 0.01 Lux. Microsemi Analog Mixed Signal Group LX1973B D S RODUCTION ATA HEET 100 Temperature ( Load Resistor (in kilo-ohms Page 6 ...

Page 7

... Dim A PIN # NAME OUT θ θ E1 Microsemi Analog Mixed Signal Group LX1973B RODUCTION ATA HEET M I ILLIMETERS NCHES MIN MAX MIN MAX 1.60 1.85 0.063 0.073 0.05 0.15 0.002 0.006 - 1.10 - 0.043 0.26 0.41 0.010 0.016 0.13 0.23 0.005 0.009 2.90 3 ...

Page 8

... Dome Bottom Package PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © ...

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