參數(shù)資料
型號(hào)： LX1974IBC
廠商： MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP
元件分類(lèi)： 光電元器件
英文描述： Ambient Light Detector
中文描述： LOGIC OUTPUT PHOTO DETECTOR
封裝： ROHS COMPLIANT, PLASTIC, 1206, 2 PIN
文件頁(yè)數(shù)： 1/9頁(yè)
文件大?。?/td> 352K
代理商： LX1974IBC
LX1974
P
RODUCTION
D
ATA
S
HEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
W
M
.
C
Ambient Light Detector
Copyright
2005
Rev. 1.0, 2006-05-09
TM
D E S C R I P T I O N
The LX1974 is a low cost silicon
light sensor with spectral response that
closely emulates the human eye.
Patented circuitry produces peak
spectral response at 520nm, with IR
response less than ±5%, of the peak
response, above 900nm.
The photo sensor is a PIN diode array
with a linear, accurate, and very
repeatable current transfer function.
High gain current mirrors on the chip
multiply the PIN diode photo-current
to a sensitivity level that can be
voltage scaled with a standard value
external resistor
.
Output current from
this simple to use two-pin device can
be used directly or converted to a
voltage by placing it in series with a
single resistor at either of its two pins.
IMPORTANT:
For the most current data, consult
MICROSEMI
’s website:
http://www.microsemi.com
Protected By U.S.Patents: 6,787,757; Patents Pending
Dynamic range is determined by the
resistors (typically in the range of 10K
to 100K) and power supply values.
Typically the LX1974 needs only 1.8V
of headroom to operate at 1000 Lux
illumination.
Internal temperature compensation
allows dark current to be kept below
200nA over the full specification
temperature range (-40 to +85°C),
providing high accuracy at low light
levels. Usable ambient light conditions
range is from 1 to more than 5000 Lux.
The LX1974 is optimized for
controlling back lighting systems in low
cost consumer products such as LCD
TV, portable computers, and digital
cameras.
K E Y F E A T U R E S
Near Human Eye Spectral
Response
Very Low IR Sensitivity
Highly Accurate & Repeatable
Output Current vs. Light
Scalable Output Voltage
Temperature Stable
Integrated High Gain Photo
Current Amplifiers
No Optical Filters Needed
A P P L I C A T I O N S
Portable Electronic Displays
LCD TV Backlight Systems
Digital Still Cameras (DSC)
Desktop Monitors
Notebook Computers
P R O D U C T H I G H L I G H T
LX1974
LIGHT
P A C K A G E O R D E R I N F O
Plastic 1206
2-Pin
T
A
(
°
C)
RoHS Compliant / Pb-free
-40 to 85
Note: Available in Tape & Reel. Append the
letters “TR” to the part number.
(i.e. LX1974IBC-TR)
BC
LX1974IBC
L
X
1
9
7
4
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