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EVALUATION KIT AVAILABLE

AVAILAB

LE

MAX44000

Ambient and Infrared Proximity Sensor

General Description

Features

S

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

S

V

DD

= 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

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

I

2

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

DD

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.

Ordering Information

PART

MAX44000GDT+

TEMP RANGE

-40NC to +105NC

PIN-PACKAGE

6 OTDFN-EP*

Applications

Smartphones

Accessories

Industrial Sensors

Presence Detection

+Denotes

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

*EP = Exposed pad.

Typical Application Circuit appears at end of data sheet.

Functional Diagrams

V

LED

V

DD

Simplified Block Diagram

V

DD

VIS + IR

(ALS)

ALS

PGA

14-BIT

MICROCONTROLLER

SDA

MAX44000

IR LED

IR (ALS)

ALS

PGA

14-/8-BIT

AMBIENT

CANCELLATION

PRX

PGA

I

2

C

SCL

INT

GND

IR (PRX)

DRV

Pin Configurations appear at end of data sheet.

Functional Diagrams continued at end of data sheet.

GND

UCSP is a trademark of Maxim Integrated Products, Inc.

For pricing, delivery, and ordering information, please contact Maxim Direct

at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.

19-5859; Rev 0; 10/11

MAX44000

Ambient and Infrared Proximity Sensor

ABSOLUTE MAXIMUM RATINGS

All Pins to GND ....................................................-0.3V to +4.0V

Output Short-Circuit Current Duration .......................Continuous

Continuous Input Current into Any Terminal ...................

Q20mA

Continuous Power Dissipation (T

A

= +70NC)

6-Pin OTDFN (derate 11.9mW/NC above +70NC) ............ 953mW

Operating Temperature Range ........................ -40NC to +105NC

Soldering Temperature (reflow) ......................................+260NC

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute

maximum rating conditions for extended periods may affect device reliability.

ELECTRICAL CHARACTERISTICS

(V

DD

= 1.8V, T

MIN

– T

MAX

= -40°C to +105°C, T

A

= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

Maximum Ambient Light

Sensitivity

Ambient Light Saturation Level

Gain Error

Light Source Matching

Infrared Transmittance

Ultraviolet Transmittance

Dark Current Level

Green LED 538nm response, T

A

= +25NC

(Note 2)

Fluorescent/incandescent light

850nm vs. 538nm, T

A

= +25NC

363nm vs. 538nm, T

A

= +25NC

100ms conversion time, 0 lux, T

A

= +25NC

14-bit resolution, has 50Hz/60Hz rejection

ADC Conversion Time

12-bit resolution

10-bit resolution

8-bit resolution

ADC Conversion Time Accuracy

T

A

= -40NC to +105NC

T

A

= +25NC

10

0.5

2

0

100

25

6.25

1.56

6

0.7

%

ms

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

AMBIENT LIGHT RECEIVER CHARACTERISTICS

Fluorescent light (Note 2)

0.03

65,535

15

Lux/LSB

Lux

%

Count

INFRARED PROXIMITY RECEIVER CHARACTERISTICS

Maximum Proximity Detection

Sensitivity

Sunlight Rejection Offset

Sunlight Rejection Gain Error

850nm IR LED, 60µW/cm

2

No reflector 0 to 100k lux

With reflector 0 to 100k lux

1.5

0

0.1

mW/cm2/

LSB

Counts

Counts/

klux

2

Maxim Integrated

MAX44000

Ambient and Infrared Proximity Sensor

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= 1.8V, T

MIN

– T

MAX

= -40°C to +105°C, T

A

= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

IR LED TRANSMITTER

Minimum IR LED Drive Current

Sink

Maximum IR LED Drive Current

Sink

Current Control Step

I

OUT

= 110mA, V

DRV

= 1.5V

Current Control Accuracy

DRV Leakage Current

Voltage Compliance of DRV Pin

Internal Transmit Pulse Width

POWER SUPPLY

Power-Supply Voltage

Quiescent Current

(Ambient Mode)

Software Shutdown Current

Quiescent Current Proximity

Quiescent Current (ALS +

Proximity, Time Average)

Power-Up Time

t

ON

V

DD

Is

I

SHDN

T

A

= +25NC

T

A

= -40NC to +105NC

During IR LED pulsed operation

With proximity and ALS sensing on

375

6.8

100

0.06

0.01

V

IL_I2C

V

IH_I2C

SDA, SCL

1.6

3

0.4

1000

0.4

1.7

5

0.1

3.6

10

0.3

0.6

600

V

FA

ms

V

nA

V

pF

I

OUT

= 50mA, V

DRV

= 1.5V

I

OUT

= 10mA, V

DRV

= 1.5V

I

OUT

= 0mA, V

DRV

= 3.6V

I

DRV

= 110mA,

DI

OUT

= 10%; V

DRV

= 3.6V

I

DRV

= 100mA,

DI

OUT

= 2%, V

DRV

= 3.6V

100

10

110

10

12

10

12

0.1

0.5

0.6

FA

V

Fs

%

mA

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DIGITAL CHARACTERISTICS (SDA, SCL,

INT)

I

SINK

= 6mA

V

OL

Output Low Voltage (SDA,

INT)

INT

Leakage Current

SDA, SCL Input Current

I

2

C Input Low Voltage

I

2

C Input High Voltage

Input Capacitance

Maxim Integrated

3

MAX44000

Ambient and Infrared Proximity Sensor

ELECTRICAL CHARACTERISTICS (continued)

(V

DD

= 1.8V, T

MIN

– T

MAX

= -40°C to +105°C, T

A

= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

I

2

C TIMING CHARACTERISTICS

Serial-Clock Frequency

Bus Free Time Between STOP

and START

Hold Time (Repeated) START

Condition

Low Period of the SCL Clock

High Period of the SCL Clock

Setup Time for a REPEATED

START

Data Hold Time

Data Setup Time

SDA Transmitting Fall Time

Setup Time for STOP Condition

Pulse Width of Suppressed Spike

f

SCL

t

BUF

t

HD,STA

t

LOW

t

HIGH

t

SU.STA

t

HD,DAT

t

SU,DAT

t

F

t

SU,STO

t

SP

I

SINK

P

6mA, t

R

and t

F

between 0.3 x V

DD

and 0.7 x V

DD

0.6

0

50

1.3

0.6

1.3

0.6

0

100

0.9

400

kHz

Fs

ns

Fs

ns

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Note 1:

All devices are 100% production tested at T

A

= +25NC. Temperature limits are guaranteed by design.

Note 2:

Guaranteed by design. Green 538nm LED chosen for production so that the IC responds to 100 lux flourescent light with

100 lux.

Typical Operating Characteristics

(V

DD

= 1.8V, T

MIN

– T

MAX

= -40°C to +85°C, unless otherwise noted. All devices are 100% production tested at

T

A

= +25°C.

Temperature limits are guaranteed by design.)

SPECTRUM RESPONSE

GREEN CHANNEL

RED CHANNEL

CIE CURVE

MAX44000 toc01

ADC COUNT vs. DISTANCE

vs. LED DRIVE CURRENT

MAX44000 toc02a

ADC COUNT vs. DISTANCE vs. OBJECT

MAX44000 toc02b

120

100

NORMALIZED OUTPUT

80

60

40

20

0

300

250

200

300

250

200

150

100

50

0

ADC COUNT

I

OUT

= 110mA

150

100

50

0

WHITE CARD

I

OUT

= 50mA

I

OUT

= 20mA

GREY CARD

270 370 470 570 670 770 870 970 1070

WAVE LENGTH (nm)

0

20

40

60

80

100

120

140

0

DISTANCE (mm)

10 20 30 40 50 60 70 80 90 100

DISTANCE (mm)

4

Maxim Integrated

MAX44000

Ambient and Infrared Proximity Sensor

Typical Operating Characteristics (continued)

(V

DD

= 1.8V, T

MIN

– T

MAX

= -40°C to +85°C, unless otherwise noted. All devices are 100% production tested at

T

A

= +25°C.

Temperature limits are guaranteed by design.)

LIGHT SENSITIVITY vs. LUX LEVEL

1600

1400

ADC COUNT

1200

1000

800

600

400

200

0

0 100 200 300 400 500 600 700 800 900 1000

REFERENCE METER READING (LUX)

0

INCANDESCENT

ALSTIM[1:0] = 00

ALSPGA[1:0] = 10

FLUORESCENT

MAX44000 toc03

SUNLIGHT REJECTION

MAX44000 toc03b

RADIATION PATTERN

90

RELATIVE SENSITIVITY (% FROM 0°)

80

70

60

50

40

30

20

10

0

-90 -70 -50 -30 -10 10 30 50 70 90

-80 -60 -40 -20 0 20 40 60 80

LUMINOSITY ANGLE (°)

ROTATED WITH AXIS BETWEEN

PIN 1/2/3 AND 4/5/6

MAX44000 toc04

1800

150

100

NO REFLECTOR

ADC COUNT

100

PRXTIM, PRXPGA : 0x02 = 1111 xxxx

LED CURRENT: 0x03 = xxxx 1110 for 100mA

WITH NO REFLECTOR, PROX COUNT STAYED

AT 0 AT ALL lux LEVEL

WITH A BLACK GLASS AS REFLECTOR AND

lux LEVEL CHANGED FROM 50 TO 75000 lux

PROX COUNTS DROPPED BY 7% AT MID-ADC RANGE

PROX COUNT DROPPED BY 35% AT QUARTER

ADC RANGE

BLACK GLASS REFLECTOR

50

10k 20k 30k 40k 50k 60k 70k 80k

SUNLIGHT (LUX)

SUPPLY CURRENT vs. SUPPLY VOLTAGE

vs. TEMPERATURE

MAX44000 toc05

OUTPUT ERROR vs. TEMPERATURE

10

9

8

COUNTS (UNITS)

7

6

5

4

3

2

1

0

-40

-15

10

35

60

85

110

TEMPERATURE (°C)

9

8

SUPPLY CURRENT (µA)

7

6

5

4

3

2

1

0

T

A

= +85°C

T

A

= +105°C

STANDARD AMBIENT MODE

DARKROOM CONDITION

V

DD

= 1.7 V TO 3.6V

T

A

= +25°C

T

A

= -40°C

STANDARD AMBIENT MODE

DARKROOM CONDITION

1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 3.5 3.7

SUPPLY VOLTAGE (V)

Maxim Integrated

MAX44000 toc06

10

11

5

MAX44000EDT+T

MAX44000EDT+T概述

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