LX1972IBC-TR Microsemi Analog Mixed Signal Group, LX1972IBC-TR Datasheet

LX1972IBC-TR

Manufacturer Part Number

LX1972IBC-TR

Description

IC AMBIENT LIGHT DETECTOR 1206

Manufacturer

Microsemi Analog Mixed Signal Group

Datasheet

1.LX1972IBC-TR.pdf (9 pages)

Specifications of LX1972IBC-TR

Wavelength

520nm

Output Type

Current

Package / Case

1206 (3216 Metric)

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

LX1972IBCTR

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LX1972IBC-TR

Manufacturer:

HRS

Quantity:

397

Current page: 1 of 9
Download datasheet (338Kb)

Rev. 1.1b, 2005-10-31

light sensor with spectral response that

closely emulates the human eye.

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:

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

The LX1972 is a low cost silicon

Patented circuitry produces peak

LX1972

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

D E S C R I P T I O N

Note: Available in Tape & Reel. Append the letters “TR” to

resistors (typically in the range of 10K

to 100K) and power supply values.

Typically the LX1972 needs only 1.8V

of headroom to operate at 1000 Lux

illumination.

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.

controlling back lighting systems in low

cost consumer products such as LCD

TV, portable computers, and digital

cameras.

-40 to 85

Dynamic range is determined by the

Internal temperature compensation

The

P R O D U C T H I G H L I G H T

P A C K A G E O R D E R I N F O

the part number. (i.e. LX1972IBC-TR)

(°C)

Integrated Products Division

LX1972

Microsemi

http://www.microsemi.com

1.2V Typical

@ 100 Lux

RoHS Compliant / Pb-free

Ambient Light

Plastic 1206

2-Pin

LX1972IBC

optimized

Ambient Light Detector

RODUCTION

for

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

Portable Electronic Displays

LCD TV Backlight Systems

Digital Still Cameras (DSC)

Desk top Monitors

Notebook Computers

PECIFICATION

K E Y F E A T U R E S

A P P L I C A T I O N S

LX1972 Top View

LX1972

Page 1

Related parts for LX1972IBC-TR

LX1972IBC-TR Summary of contents

Page 1

... Plastic 1206 BC 2-Pin T (°C) A RoHS Compliant / Pb-free - LX1972IBC Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1972IBC-TR) Microsemi Integrated Products Division LX1972 S PECIFICATION Near Human Eye Spectral Response Very Low IR Sensitivity Highly Accurate & Repeatable Output Current vs ...

Page 2

Supply Input Voltage ...........................................................................-0. Ground Current ..........................................................................Internally Limited Operating Temperature Range .........................................................-40°C to 85°C Maximum ...

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TM Unless otherwise specified, the following specifications apply over the operating ambient temperature -40°C otherwise noted and the following test conditions: See Note 1, V Parameter RESPONSE Peak Spectral Response Infrared Response Minimum Operational Voltage Light Current Gain Linearity Dark ...

Page 5

TM L IGHT UNITS 2 In converting from W/cm to lux it is necessary to µ define the light source. Lux is a unit for the measurement of illuminance, which is the photometric flux density or visible light flux density. ...

Page 6

TM The following examples present both fully automatic (no user input) and semi-automatic to fully manual override implementations. These general guidelines are applicable to a wide variety of potential light control applications. The LX1972 can be used to control the ...

Page 7

TM VIN R1 100K GND SHDN 3.3V LX1972 VSS Figure 7 – Typical Application with Microsemi’s LX1995 LED Driver 2.0V to 5.5V IN PWM Dimming Input LX1972 3.3V MMBT2907 VDD VSS 100K 178K Figure 8 – Typical ...

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TM 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 ...

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