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PDF LX1973 Data sheet ( Hoja de datos )
| Número de pieza | LX1973 | |
| Descripción | Automotive Light Sensor | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LX1973 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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LX1973
www.DataSheet4U.com
TM ® Automotive Light Sensor
PRODUCTION DATA SHEET
DESCRIPTION
The LX1973 is a wide dynamic The LX1973 internal circuitry
range light sensor with a very low consists of a diode array that provides a
dark current that is optimized for nearly perfect photopic light wave-
sensing low level light signals that length response curve. The sensor
typically occur under dark or output feeds into a wide dynamic range
darkening outdoor ambient lighting. compression amplifier that provides
The LX1973 has been optimized for accurate resolution over five decades of
automotive systems such as headlamp ambient light. The integrated dark
brightness control or rear view mirror current cancellation circuit facilitates
contrast control. Its radical (fractional accurate sensing of light below 0.01
exponent) response when interfaced lux. The current source output of the
with an 8 bit DAC can detect levels LX1973 can be gain scaled using one
down to 0.001 lux or levels as high as external resistor.
500 lux.
The LX1973 is internally trimmed to
The spectral response of the an initial accuracy of 5% at room
integrated light sensor closely temperature and a light level of 10lux.
emulates the human eye so it ignores Accuracy of 10% is maintained over the
light such as infrared which emits full temperature range (-40 to +85C).
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: http://www.microsemi.com
Protected by US Patent: 6,787,757; Patents Pending
KEY FEATURES
Human Eye Spectral Response
25C Dark Current < 0.005 lux
5 Decades Compressed Output
10% Accuracy Over
Temperature
Scalable Output Voltage
No Optical Filters Needed
APPLICATIONS
Auto Headlamp Control
Auto Mirror Contrast Control
PRODUCT HIGHLIGHT
LX1973 Response
5V 4.0000
3.0000
NC LXP1a9r7t3
VOUT
10k
2.0000
1.0000
0.0000
0.001
0.01
0.1
1
10 100
Ambient Light (in lux)
Copyright © 2004
Rev. 1.0 2006-01-04
PACKAGE ORDER INFO
TA (°C)
-40 to 85
Plastic MSOP
DU 8-pin
RoHS Compliant / Pb-free
LX1973IDU
Note: Available in Tape & Reel. Append the letters “TR” to the
part number. (i.e. LX1973IDU-TR)
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
1 page  
TM ®
SENSITIVITY
600
500
400
300
200
100
0
0.001 0.01 0.1
1
10 100 1000
Ambient Light (lux)
RESPONSE VS WAVELENGTH
LX1973 Range
MAXIMUM OUTPUT VOLTAGE
VDD =
6 5.5V
VDD = 5V
5
4
3
2
1
0
1 10 100 1000
Output Current (uA)
LX1973
www.DataSheet4U.com
Automotive Light Sensor
PRODUCTION DATA SHEET
DARK CURRENT VS TEMP
10000
1000
100
10
Limit
Typical
1
0 10 20 30 40 50 60 70 80 85
Temperature (°C)
IOUT STEP RESPONSE
16
14
12
10
8
6
4
2
0
0
0.5 1
Time (Seconds)
Load = 3.8kΩ and 1µF
Photo Step = Direct Light Input of 14.6µW/cm2
Copyright © 2004
Rev. 1.0 2006-01-04
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LX1973.PDF ] | |
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