LX1972AIBC Datasheet

IC型號：
LX1972AIBC
PDF描述：
Ambient Light Detector
文件大小：
278.02KB
PDF頁數(shù)：
9頁
芯片廠家：
MICROSEMI

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LX1972A

廬

Ambient Light Detector

RODUCTION

ATA

HEET

DESCRIPTION

KEY FEATURES

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

APPLICATIONS

The LX1972A is a low cost silicon

light sensor with a spectral response

that closely emulates the human eye.

Patented circuitry produces peak

spectral response at 580nm, with an IR

response less than 鹵5% of the peak

response, above 900nm.

The photo sensor is a PIN diode

array with Microsemi鈥檚

Best Eye鈩?/div>

processing that provides a nearly

perfect photopic light wavelength

response curve. LX1972A provides 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.

Dynamic range is determined by the

resistors (typically in the range of 5K to

100K) and the power supply values.

Typically the LX1972A needs only

2.7V 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擄C to +85擄C),

providing high accuracy at low light

levels. Usable ambient light conditions

range is from 1 to more than 5000 Lux.

The LX1972A is optimized for

controlling back lighting systems in low

cost consumer products such as LCD

TV, portable computers, and digital

cameras.

WWW .

Microsemi

Portable Electronic Displays

LCD TV Backlight Systems

Digital Still Cameras (DSC)

Desk Top Monitors

Notebook Computers

IMPORTANT:

For the most current data, consult

MICROSEMI鈥檚

website:

http://www.microsemi.com

Protected By U.S. Patents: 6,787,757; Patents Pending

PRODUCT HIGHLIGHT

1.7V Typical

@ 100 Lux

LX1972A

Ambient Light

PACKAGE ORDER INFO

LX1972A

(擄C)

-40 to 85

Plastic 1206

2-Pin

LX1972AIBC

RoHS Compliant / Pb-free

Note: Available in Tape & Reel. Append the letters 鈥淭R鈥?to

the part number. (i.e. LX1972AIBC-TR)

漏

2005

Rev. 1.0, 2006-09-18

Microsemi

Integrated Products Group

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 1

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