lx1973a Microsemi Corporation, lx1973a Datasheet

no-image

lx1973a

Manufacturer Part Number
lx1973a
Description
Automotive Light Sensor
Manufacturer
Microsemi Corporation
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
lx1973aIDU-TR
Manufacturer:
MSC
Quantity:
21 820
Copyright © 2005
Rev. 1.1, 2006-12-15
range light sensor with a very low
dark current that is optimized for
sensing low level light signals that
typically
darkening outdoor ambient lighting.
The LX1973A has been optimized 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
The LX1973A is a wide dynamic
The
TM
spectral
occur
light
response
under
-40 to 85
sensor
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
T
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1973AIDU-TR)
A
(°C)
LX1973A
dark
D E S C R I P T I O N
Part
of
5V
closely
DR
the
or
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
LX1973A can be gain scaled using one
external resistor.
to an initial accuracy of 5% at room
temperature and a light level of 10lux.
Accuracy of 10% is maintained over the
full temperature range (-40 to +85°C).
Plastic MSOP Reversed Form
8-Pin
The LX1973A internal circuitry
The LX1973A is internally trimmed
RoHS Compliant / Pb-free
P R O D U C T H I G H L I G H T
R
P A C K A G E O R D E R I N F O
LX1973AIDR
LOAD
V
Integrated Products Division
OUT
of
®
Microsemi
http://www.microsemi.com
a
4.0
3.0
2.0
1.0
0.0
0.001
diode
LX1973A Response
0.01
Ambient Light (in lux)
array
0.1
Automotive Light Sensor
DU
with
P
RODUCTION
1
RoHS Compliant / Pb-free
LX1973AIDU
Plastic MSOP
8-pin
10
100
Nearly Perfect Best Eye™
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
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
S
HEET
LX1973A
Page 1

Related parts for lx1973a

lx1973a Summary of contents

Page 1

... LX1973A DR T (° Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1973AIDU-TR) Copyright © 2005 Rev. 1.1, 2006-12-15 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Automotive Light Sensor The LX1973A internal circuitry ...

Page 2

... Photopic Com- Pre Sensor with pression Amplifier Dark Current Amplifier Cancellation Figure 1 – Simplified block Diagram Microsemi Integrated Products Division LX1973A RODUCTION ATA HEET N.C. ...

Page 3

... EL ⎣ ⎦ I REF = 5824µA. = 5985µA REF Microsemi Integrated Products Division LX1973A RODUCTION ATA HEET ≤ ≤ T 85°C except where A LX1973A Min Typ Max 4.5 5.5 0.2 0.25 = 0.1µ OUT 580 - 570 0. 103 114 125 183 203 ...

Page 4

... Part LX1973A LX1800 SCL V DD SCD REF 2.5V Part AIN GND ADR AOUT DAC/ADC BRT HEADLAMP CONTROLLER Figure 4 – Typical Application Microsemi Integrated Products Division LX1973A D S ATA HEET OUT Part V OUT 810nm GND R LOAD LX1973A 10K 1µF LAMP Page 4 ...

Page 5

... ENERAL ESCRIPTION The LX1973A produces an output current that is sensitive to the level of ambient light that falls onto the photosensitive area of the IC package. The sensitivity is amplified and compressed to provide ratio metric accuracy across several decades. The sensitivity function is ref = × ...

Page 6

... 450 400 350 300 250 200 150 100 50 Photo Step = Direct Light Input of 1 lux to 0.01 lux. Microsemi Integrated Products Division LX1973A RODUCTION ATA HEET Temperature (C) 5.0V 5.5V ...

Page 7

... Ø L Ø Note: Dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006”) on any side. E1 Lead dimension shall not include solder coverage. Microsemi Integrated Products Division LX1973A RODUCTION ATA HEET M I ILLIMETERS NCHES MIN MAX MIN MAX – ...

Page 8

... Automotive Light Sensor 4.8 mm (0.189 in.) 0.65 mm (0.023 in.) 0.41 mm 1.02 mm (0.016 in.) ( 0.04 in.) DU Package 4.8 mm (0.189 in.) 0.65 mm (0.023 in.) 0.41 mm 1.02 mm (0.016 in.) ( 0.04 in.) DR Package Microsemi Integrated Products Division LX1973A D S RODUCTION ATA HEET V SS N.C. N.C. N. N.C. N.C. OUT Page 8 ...

Page 9

... Ref 0.4mm DU Package Tape and Reel Information 2mm ±0.1 REF 3.3mm ±0.1 8mm ±0.1 0.15mm Ref 0.4mm DR Package Tape and Reel Information Microsemi Integrated Products Division LX1973A RODUCTION ATA HEET 4mm ±0.1 Pin 1 12mm ±0.3 3.3mm ±0.1 Ø 1.6mm ± ...

Page 10

... Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2005 Rev. 1.1, 2006-12-15 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 ® Automotive Light Sensor P RODUCTION Microsemi Integrated Products Division LX1973A D S ATA HEET Page 10 ...

Related keywords