intersil ISL29002 DATA SHEET

®

ISL29002

Data Sheet December 1, 2006

Light-to-Digital I2C Sensor

The ISL29002 is an integrated light sensor with a built-i n
integrating type ADC and a standard I2C interface. The
device transforms illuminance, ambient light level in lux, into
a digital output signal accessible through I

2

C. The sensor
precisely converts illuminance from 1lux to 100,000lux. The
ADC features up to 15-bit effective resolution. The sensor
includes another photodiode covered with metal to reduce
the effects of dark output reading that may be significant in
low lux levels.

The ISL29002 can control display panel backlighting depending
on ambient light conditions, adding artificial intelligence by
approximating the response of a human eye. The ISL29002
can also manage portable peripheral illumination based upon
lighting conditions extending battery life.

In normal operation, the ISL29002 consumes less than 300µA
of supply current. A software power down mode is controlled

2

via the I

C interface and disables all but the I2C interface. The

supply current is then reduced to less than 88µA.
Designed to operate on supplies from 2.5V to 3.3V, the

ISL29002 is specified for operation over the -40°C to +85°C
ambient temperature range. It is packaged in a clear, Pb-free
8 Ld ODFN package.

Block Diagram

VDD

1

PHOTODIODE 1

COMMAND
REGISTER

MUX

PHOTODIODE2

IREF

FOSC

INTEGRATING

ADC

COUNTER

16

2

DATA

REGISTER

2

C

I

7
8

SCL
SDA

FN7465.2

Features

•I2C interface fast mode at 400kHz

• 88µA disabled current

• Adjustable max lux range: 10,000lux to 100,000lux

• Up to 15-bit effective resolution

• Adjustable resolution: 0.15 to 1.65 counts per lux

• Simple output code proportional to lux

• Flicker/noise rejection

• Variable integration time; 50ms to 550ms

• 2.5V to 3.3V supply

• 8 Ld ODFN (3mmx3mm)

• Temperature compensation

• Pb-free available (RoHS compliant)

Applications

• Backlight sensing

• Automatic backlight adjustment

• Backlight linearity adjustments

Ordering Information

TEMP.

PART NUMBER

(Note)

ISL29002IROZ -40 to +85 - 8 Ld 3x3 ODFN MDP0052
ISL29002IROZ-T7 -40 to +85 7” 8 Ld 3x3 ODFN MDP0052

NOTE: Intersil Pb-free ODFN products employ special Pb-free material
sets; molding compounds/die attach materials and 100% matte tin plate
termination finish, which are RoHS compliant and compatible with both
SnPb and Pb-free soldering operations. Intersil Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020.

RANGE

(°C)

TAPE &

REEL

PACKAGE

(Pb-Free)

PKG.

DWG. #

3 2 6 5 4

R

EXT

GND A1A2 A0

1

Pinout

VDD

GND

R

EXT

A0

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774

| Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

Copyright © Intersil Americas Inc. 2006. All Rights Reserved.

ISL29002

(8 LD ODFN)

TOP VIEW

1

2

THERMAL

3

4

PAD

8

SDA

SCL

7

A2

6

A1

5

ISL29002

Absolute Maximum Ratings (T

Maximum Supply Voltage between V

2

I

C Address Pin Voltage (A2, A1, A0) . . . . . . . . . . . . . -0.2V to 3.6V

2

I

C Bus Pin Voltage (SCL, SDA). . . . . . . . . . . . . . . . . -0.2V to 5.5V

2

I

C Bus Pin Current (SCL, SDA) . . . . . . . . . . . . . . . . . . . . . . <10mA

R

Pin Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.2V to 3.6V

EXT

Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C

CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.

IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests
are at the specified temperature and are pulsed tests, therefore: TJ = TC = T

Electrical Specifications V

= +25°C)

A

and GND . . . . . . . . . . 3.6V

DD

= 3V, TA = +25°C, R

DD

Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C

Storage Temperature. . . . . . . . . . . . . . . . . . . . . . . .-45°C to +100°C

ESD, Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2kV

A

= 100kΩ 1%, I2C command = 00(hex) (Note 1), unless otherwise specified.

EXT

PARAMETER DESCRIPTION CONDITION MIN TYP MAX UNIT

V

DD

I

DD

I

DD1

t

UPD

f

OSC

F

I2C

DATA0 Dark ADC Code E = 0lux

Power Supply Range 2.25 3.63 V
Supply Current 0.3 0.375 mA
Supply Current Software disabled 88 110 µA
Internal Update Time/Conversion Time 85 110 135 ms
Internal Oscillator Frequency 300 kHz
I2C Clock Rate (Note 2) 1 400 kHz

1 Counts

E = 0lux, integration time = 550ms 4
DATA1 ADC Code ADC full scale count value 32,768 Counts
DATA2 ADC Code E = 25,000lux, Fluorescent light

13,500 16,000 18,500 Counts

(Note 3)
V
V
V
I

SDA

I

IL

I

IH

REF
TL
TH

Voltage of R
SCL, SDA, A0, A1, and A2 Threshold LO (Note 4) 1.05 V
SCL, SDA, A0, A1, and A2 Threshold HI (Note 4) 1.95 V
SDA Current Sinking Capability 3 5 mA
A0, A1, and A2 Input Current LO A0 = A1 = A2 = GND 0.1 µA
A0, A1, and A2 Input Current HI A0 = A1 = A2 = V

Pin 0.45 0.51 0.53 V

EXT

DD

0.1 µA

NOTES:

2

1. For I

2. Minimum I

C command = 00H, the ADC converts the current of (photo) diode 1 into a 16 bit data with an internally timed integration of 110ms for

R

= 100kΩ, 1% tolerance.

EXT

2

C Clock Rate is guaranteed by design.

3. Fluorescent light is substituted by an LED at production.

4. The voltage threshold levels of the SDA and SCL pins are VDD dependent: V

= 0.35*VDD. VTH = 0.65*VDD.

TL

2

FN7465.2

December 1, 2006

ISL29002

Pin Descriptions

PIN NUMBER PIN NAME DESCRIPTION

1 VDD Positive supply. Connect to a clean 2.25V to 3.3V supply
2 GND Ground. The thermal pad is connected to the GND pin
3R

EXT

4 A0 Bit 0 of the I
5 A1 Bit 1 of the I
6 A2 Bit 2 of the I
7SCLI
8SDAI

External resistor pin is for the ADC reference current, the integration time adjustment in internal timing
mode, and lux range/resolution adjustment. 100kΩ 1% tolerance resistor recommended.

2

C address. The address pins have an open gate equivalent circuit. These are the

2

C address.

2

C address.

2

C serial clock line The I2C bus lines can pulled above VDD, 5.5V max.

2

C serial data line

least-significant bits of the I
40(hex) through 48(hex).

2

C address. The eight possible addresses are

Typical Performance Curves R

320

TA = +27°C

Ta= 27oC

COMMAND = 00H

COMMAND = 00H

306

25000 lux

292

278

1000 lux

264

SUPPLY CURRENT (μA)

250

2.0 2.3 2.6 2.9 3.2 3.5 3.8
SUPPLY VOLTAGE (V)

EXT

= 100kΩ

10

TA = +27°C

Ta = 27oC

COMMAND = 00H

COMMAND = 00H

0 lux

8

0 lux

6

4

2

OUTPUT CODE (COUNTS)

0

2.0 2.3 2.6 2.9 3.2 3.5 3.8
SUPPLY VOLTAGE (V)

FIGURE 1. SUPPLY CURRENT vs SUPPLY VOLTAGE FIGURE 2. OUTPUT CODE FOR 0LUX vs SUPPLY VOLTAGE

1.015

1.010

Ta= 27oC

TA = +27°C

COMMAND = 00H

COMMAND = 00H

25000 lux

320.0

319.5

TA = +27°C

Ta = 27oC

1.005

319.0

1.000

(% FROM 3V)

0.995

OUTPUT CODE RATIO

0.990

2.0 2.3 2.6 2.9 3.2 3.5 3.8

1000 lux

SUPPLY VOLTAGE (V)

318.5

318.0

OSCILLATOR FREQUENCY (kHz)

2.0 2.3 2.6 2.9 3.2 3.5 3.8
SUPPLY VOLTAGE (V)

FIGURE 3. OUTPUT CODE vs SUPPLY VOLTAGE FIGURE 4. OSCILLATOR FREQUENCY vs SUPPLY VOLTAGE

3

December 1, 2006

FN7465.2