IC SENSOR LIGHT VISIBLE 8MSOP

LX1971IDU

Manufacturer Part NumberLX1971IDU
DescriptionIC SENSOR LIGHT VISIBLE 8MSOP
ManufacturerMicrosemi Analog Mixed Signal Group
LX1971IDU datasheet
 

Specifications of LX1971IDU

Wavelength520nmOutput TypeCurrent
Package / Case8-TSSOP, 8-MSOP (0.118", 3.00mm Width)Lead Free Status / RoHS StatusLead free / RoHS Compliant
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I N T E G R A T E D
D E S C R I P T I O N
The LX1971 is a new technology light
sensor
with
spectral
response
emulates the human eye; it is pin to pin
compatible
to
Microsemi’s
LX1970
visible light sensor however with a wider
dynamic range.
This device is ideal for monitoring
ambient light for the control of artificial
lighting,
operation
of
shades,
signage and display, street lighting,
automotive light sensors and control of
backlight dimming. It has a unique photo
diode arrangement (patents pending) with
a peak response at 520nm while sharply
attenuating both ultra violet and infrared
wavelengths.
The photo sensor is a PIN diode array
with an accurate and very repeatable
current output.
IMPORTANT: For the most current data, consult MICROSEMI’s website:
Protected By U.S. Patents: 6,787,757; Patents Pending
V
DD
LX1971
4.7uF
Copyright © 2003
Rev. 1.1b,2005-08-10
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Wide Range Visible Light Sensor
P R O D U C T S
Photo current is first multiplied by an
that
integrated high gain amplifier then the
square root is taken of the product of the
amplifier and an internal reference current.
Finally this is further multiplied converted
to current and made available at two
output pins; one a current source and the
other a current sink.
LED
These currents can easily be converted
to voltage by adding a single resistor at
either or both outputs. Voltage gain is
determined by the resistor value typically
in the 5KΩ to 50KΩ range.
With accurate internal gain amplifiers
and square root transfer function, design
complexity and cost are greatly reduced.
The LX1971 is available in the Clear 8-
pin MSOP package.
http://www.microsemi.com
P R O D U C T H I G H L I G H T
V
DD
4.7uF
SNK
25K
SNK
V
OUT
SRC
SRC
25K
GND
PACKAGE ORDER INFO
Plastic MSOP
DU
T
(°C)
8-Pin
A
RoHS Compliant / Pb-free
-40 to 85
LX1971IDU
Note: Available in Tape & Reel. Append the letters “TR” to the
part number. (i.e. LX1971IDU-TR)
Microsemi
Integrated Products
LX1971
P
D
S
RODUCTION
ATA
HEET
K E Y F E A T U R E S
Approximate Human Eye
Spectral Response
Low IR Sensitivity
Highly Accurate &
Repeatable Output Current
vs. Light
Square root transfer function
Temperature Stable
Integrated High Gain Photo
Current Amplifiers
Complementary Current
Outputs
No Optical Filters Needed
B E N I F I T S
• Requires no wavelength
filters
• Insensitive to UV and IR
• More than 4 decades usable
light range
• Enables accurate lighting
control systems
0.60V Typ
0.45V Typ
Ambient
Light
Page 1

LX1971IDU Summary of contents

  • Page 1

    ... GND PACKAGE ORDER INFO Plastic MSOP DU T (°C) 8-Pin A RoHS Compliant / Pb-free - LX1971IDU Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1971IDU-TR) Microsemi Integrated Products LX1971 RODUCTION ATA HEET Approximate Human Eye Spectral Response Low IR Sensitivity Highly Accurate & ...

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    ................................................................................................................. -0 SNK/SRC ...

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    ...

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    The LX1971 is a light sensor with a spectral response that resembles the human visual system packaged in clear MSOP package with the same pin out and same ...

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    The following examples present both fully automatic (no user input) and semi-automatic, to fully manual override implementations. These general guidelines are applicable to a wide variety of potential light control ...

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    ...

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    120 100 0.1 ...

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    8-Pin Miniature Shrink Outline Package (MSOP) D Top View Side Views Recommended light footprint pattern Copyright © 2003 Rev. 1.1b,2005-08-10 ...

  • Page 9

    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 ...