LX1971IDUT/R MICROSEMI, LX1971IDUT/R Datasheet

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LX1971IDUT/R

Manufacturer Part Number
LX1971IDUT/R
Description
Manufacturer
MICROSEMI
Datasheet

Specifications of LX1971IDUT/R

Lead Free Status / Rohs Status
Compliant
Copyright © 2003
Rev. 1.1b,2005-08-10
sensor
emulates the human eye; it is pin to pin
compatible
visible light sensor however with a wider
dynamic range.
ambient light for the control of artificial
lighting,
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.
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
The LX1971 is a new technology light
This device is ideal for monitoring
The photo sensor is a PIN diode array
with
operation
I N T E G R A T E D
to
spectral
Microsemi’s
V
LX1971
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
of
DD
response
shades,
D E S C R I P T I O N
LX1970
4.7uF
4.7uF
P R O D U C T S
LED
that
Note: Available in Tape & Reel. Append the letters “TR” to the
-40 to 85
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.
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.
and square root transfer function, design
complexity and cost are greatly reduced.
pin MSOP package.
T
25K
25K
P R O D U C T H I G H L I G H T
part number. (i.e. LX1971IDU-TR)
Photo current is first multiplied by an
These currents can easily be converted
With accurate internal gain amplifiers
The LX1971 is available in the Clear 8-
SRC
A
SNK
(°C)
PACKAGE ORDER INFO
Integrated Products
GND
Microsemi
V
V
OUT
DD
DU
http://www.microsemi.com
SNK
SRC
RoHS Compliant / Pb-free
Plastic MSOP
8-Pin
LX1971IDU
Wide Range Visible Light Sensor
Ambient
P
RODUCTION
Light
D
• Requires no wavelength
• Insensitive to UV and IR
• More than 4 decades usable
• Enables accurate lighting
ATA
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
filters
light range
control systems
K E Y F E A T U R E S
S
HEET
0.60V Typ
0.45V Typ
B E N I F I T S
LX1971
Page 1

Related parts for LX1971IDUT/R

LX1971IDUT/R Summary of contents

Page 1

... 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 © ...

Page 2

... 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 0. θ A 206°C/W MBIENT JA , θ C 39°C/W ASE ESCRIPTION SNK SRC Microsemi Integrated Products LX1971 RODUCTION ATA HEET VDD SRC ACKAGE (Top View) ...

Page 3

... No Light, 25°C DARK5.5V DD λ PS θ ½ PSRR 5. Minimum usable resolution MIN Current responsivity change with I ∆ IR additional direct light input of 584µW/cm SRC at 910nm 25° Photodiode Area Microsemi Integrated Products LX1971 RODUCTION ATA HEET LX1971 Min Typ Max 3¹ 5 100 ≤ ...

Page 4

... 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 supply voltage range as Microsemi’s LX1970 light sensor. The LX1971 responsiveness however differs from that of the LX1970. In general the LX1971 has lower sensitivity and a wider dynamic range ...

Page 5

... For example since there is also a complimentary sink output a resistor from VDD to SNK could develop a hysteresis fixed (or adjustable) reference voltage and develop a logic signal. operation of shades such a signal would engage the function when reaching the correct ambient light level. Microsemi Integrated Products LX1971 RODUCTION ...

Page 6

... Wide Range Visible Light Sensor 1000 100 10 1 -40 4.5 5 5.5 1.15 1.1 1.05 1 0.95 0.9 0.85 0.8 10000 100000 -50 Microsemi Integrated Products LX1971 RODUCTION ATA HEET 0.5 1 1.5 Tim e (Seconds 3.0V 25K & 4.7uF DD SRC 3V 5V 5.5V - Temperature (º 25K & 4.7uF ...

Page 7

... Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Wide Range Visible Light Sensor 100 0.4 0.5 0 12000 15000 18000 0 Microsemi Integrated Products LX1971 RODUCTION ATA HEET 0.2 0.3 0.4 0.5 0.6 0.7 Source Com pliance Voltage (VDD-SRC 3.0V 25K & 4.7µF DD SRC Incandescent ...

Page 8

... Note: P1 represents a possible light footprint and its dimensions are not subject to strict tolerances. Only the active area of the device is required to be covered with light. This larger footprint is designed to ensure P1 coverage of the device’s active area. Microsemi Integrated Products LX1971 RODUCTION ATA ...

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 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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