LX1970IDU Visible Light Sensor0 pages

LX1970
I N T E G R A T E D

Visible Light Sensor

P R O D U C T S

P RODUCTION D ATA S HEET

KEY FEATURES

DESCRIPTION

Photo current is multiplied by
integrated high gain amplifiers and is
made available at two output pins; one a
current source and the other a current sink.
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 10KΩ to 50KΩ range.
With accurate internal gain amplifiers,
design complexity and cost are greatly
reduced.
The LX1970 is available in the 8-pin
MSOP.

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
Protected By U.S. Patents: 6,787,757; Patents Pending

Approximate Human Eye
Spectral Response
Low IR Sensitivity
Highly Accurate &
Repeatable Output Current
vs. Light
Voltage Scalable
Temperature Stable
Integrated High Gain Photo
Current Amplifiers
Complementary Current
Outputs
No Optical Filters Needed

WWW . Microsemi .C OM

The LX1970 is a new technology light
sensor with spectral response that
emulates the human eye.
This device is ideal for monitoring
ambient light for brightness control
systems in flat panel displays. It has a
unique photo diode arrangement (patents
pending) with a peak response at 520 nm
while sharply attenuating both ultra violet
and infrared wavelengths.
The photo sensor is a PIN diode array
with an accurate, linear, and very
repeatable current transfer function.

APPLICATIONS
PDA
Notebook PC
LCD TV
Tablet PC
Cell phones

PRODUCT HIGHLIGHT

V DD
4.7uF

V DD
50K

I

SNK

LX1970

SNK

0.3V T yp

V OUT
SRC
4.7uF

I

50K

G ND

0.3V T YP

SRC

LX1970
LX1970

Am bient
Light

PACKAGE ORDER INFO
Plastic MSOP
DU 8-Pin
TA (°C)
RoHS Compliant / Pb-free

-40 to 85

LX1970IDU

Note: Available in Tape & Reel. Append the letters “TR” to
the part number. (i.e. LX1970IDU-TR)

Copyright © 2007
Rev. 1.5b, 2008-01-25

Microsemi
Analog Mixed Signal Group
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

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