Rainbow-electronics MAX44000 Uživatelský manuál stáhnout pdf

_______________________________________________________________ Maxim Integrated Products 1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX44000

Ambient and Infrared Proximity Sensor

General Description

The MAX44000 combines a wide-dynamic range ambient

light sensor with an integrated infrared proximity sensor. The

IC is a perfect solution for touch-screen portable devices.

The IC can consume as low as 11µA (time averaged) in

ambient light sensing plus proximity sensing, including

external IR LED current.

The on-chip ambient sensor has the ability to make wide

dynamic range 0.03 lux to 65,535 lux measurements. An

on-chip IR proximity detector is matched with an inte-

grated IR LED driver. All readings are available on an

C communication bus. A programmable interrupt pin

minimizes the need to poll the device for data, freeing

up microcontroller resources, reducing system software

overhead, and ultimately, reducing power consumption.

The IC is designed to drive an external IR LED and can

operate from a V

of 1.7V to 3.6V. It consumes just 5µA

operating current when only the ambient light sensor is

enabled and 7µA when the proximity receiver and driver

are enabled.

Applications

Smartphones

Accessories

Industrial Sensors

Presence Detection

Features

S Tiny, 2mm x 2mm x 0.6mm UTDFN-Opto Package

S V

= 1.7V to 3.6V

S Low-Power Operation

5µA in Ambient Mode

7µA in Ambient Plus Proximity Mode

70µA in Ambient Plus Proximity Mode,

Including 100mA LED Current

S Excellent Light Source Matching

Programmable Green and IR Channel Gains

S Integrated Single-Pulse IR LED Driver

10mA to 110mA Programmable Range

Internal Ambient Cancellation

S -40NC to +105NC Temperature Range

19-5859; Rev 0; 10/11

Typical Application Circuit appears at end of data sheet.

Simplified Block Diagram

+Denotes a lead(Pb)-free/RoHS-compliant package.

*EP = Exposed pad.

Ordering Information

14-/8-BIT

IR LED

DRV

VIS + IR

(ALS)

IR (ALS)

IR (PRX)

LED

14-BIT

ALS

PGA

AMBIENT

CANCELLATION

ALS

PGA

SDA

SCL

INT

MAX44000

GND

MICROCONTROLLER

GND

PRX

PGA

PART TEMP RANGE PIN-PACKAGE

MAX44000GDT+

-40NC to +105NC

6 OTDFN-EP*

1 2 3 4 5 6 ... 23 24

MAX44000 1

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_______________________________________________________________ Maxim Integrated Products 1For pricing, delivery, and ordering information, please

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10 _____________________________________________________________________________________MAX44000Ambient and Infrared Proximity Sensor

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______________________________________________________________________________________ 11MAX44000Ambient and Infrared Proximity SensorProximity Inter

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12 _____________________________________________________________________________________MAX44000Ambient and Infrared Proximity SensorProximity Inter

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______________________________________________________________________________________ 13MAX44000Ambient and Infrared Proximity SensorAmbient ADC Con

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14 _____________________________________________________________________________________MAX44000Ambient and Infrared Proximity SensorThe 2 bytes her

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16 _____________________________________________________________________________________MAX44000Ambient and Infrared Proximity SensorProximity Thres

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18 _____________________________________________________________________________________MAX44000Ambient and Infrared Proximity SensorInterrupt Pin V

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______________________________________________________________________________________ 19MAX44000Ambient and Infrared Proximity SensorBit TransferOne

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2 ______________________________________________________________________________________MAX44000Ambient and Infrared Proximity SensorStresses beyond

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20 _____________________________________________________________________________________MAX44000Ambient and Infrared Proximity SensorWrite Data Form

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______________________________________________________________________________________ 21MAX44000Ambient and Infrared Proximity SensorFigure 8. Readi

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22 _____________________________________________________________________________________MAX44000Ambient and Infrared Proximity Sensor

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Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

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_______________________________________________________________________________________ 3MAX44000Ambient and Infrared Proximity SensorELECTRICAL CHAR

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4 ______________________________________________________________________________________MAX44000Ambient and Infrared Proximity SensorNote 2: All de

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8 ______________________________________________________________________________________MAX44000Ambient and Infrared Proximity SensorFigure 1. Spect

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_______________________________________________________________________________________ 9MAX44000Ambient and Infrared Proximity Sensor

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