DATASHEET
ISL29011
Digital Ambient Light Sensor and Proximity Sensor with Interrupt Function
The ISL29011 is an integrated ambient and infrared
light-to-digital converter with a built-in IR LED driver and I
2
C
Interface (SMBus Compatible). This device provides not only
ambient light sensing to allow robust backlight/display brightness
control but also infrared sensing to allow proximity estimation
featured with interrupt function.
For ambient light sensing, an internal ADC has been designed
based on the charge-balancing A/D conversion technique. The
ADC conversion time is nominally 90ms and is user adjustable
from 11µs to 90ms, depending on oscillator frequency and ADC
resolution. This ADC is capable of rejecting 50Hz and 60Hz flicker
noise caused by artificial light sources. The lux-range-select
feature allows users to program the lux range for optimized
counts/lux.
For proximity sensing, the ADC is used to digitize the output signal
from the photodiode array when the internal IR LED driver is
turned on and off for the programmed time periods under
user-selected modulation frequency to drive the external IR LED.
As this proximity sensor employs a noise cancellation scheme to
highly reject unwanted IR noise, the digital output of proximity
sensing decreases with distance. The driver output current is user
selectable up to 100mA to drive different types of IR emitter
LEDs.
Six different modes of operation can be selected via the I
2
C
interface: Programmable ALS once with auto power-down,
programmable IR sensing once, programmable proximity sensing
once, programmable continuous ALS sensing, programmable
continuous IR sensing and programmable continuous proximity
sensing. The programmable one-time operation modes greatly
reduce power because an immediate automatic shutdown
reduces overall supply current less than 0.5µA.
The ISL29011 supports both hardware and software interrupts
that remain asserted until the host clears it through the I
2
C
interface for ambient light sensing and proximity detection.
Designed to operate on supplies from 2.25V to 3.63V, the
ISL29011 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.
FN6467
Rev 6.00
May 1, 2014
Features
Proximity Sensing
• Ambient IR cancellation during proximity sensing
- Works under direct sunlight
• IR LED driver with programmable source current
- Adjustable current drive from 100mA to 12.5mA
• Programmable LED current modulation frequency
• Variable conversion resolution
Ambient Light Sensing
• Simple output code directly proportional to lux
• Adjustable sensitivity up to 65 counts per lux
• Selectable range (via I
2
C)
- Range 1 = 0.015 lux to 1,000 lux
- Range 2 = 0.06 lux to 4,000 lux
- Range 3 = 0.24 lux to 16,000 lux
- Range 4 = 0.96 lux to 64,000 lux
• Integrated 50Hz/60Hz noise rejection
• Works under various light sources, including sunlight
Ideal Spectral Response for Light and Proximity Sensor
• Light sensor close to human eye response
- Excellent light sensor IR and UV rejection
• Proximity sensor range from 850nm to 950nm
- Can use either 850nm or 950nm LED solution
Ultra Low Power
• 90µA max operating current
• Software shutdown and automatic shutdown
- 0.5µA max shutdown current
Easy to Use
• I
2
C (SMBus compatible) output
• No complex algorithms needed
• Temperature compensated
• Small form factor
- 8 Ld 2.0mmx2.1mmx0.7mm ODFN package
Additional Features
• I
2
C and SMBus compatible
• 1.7V to 3.63V supply for I
2
C interface
• 2.25V to 3.63V sensor power supply
• Pb-Free (RoHS compliant)
Applications
• Display and keypad dimming adjustment and proximity
sensing for:
- Mobile devices: smart phone, PDA, GPS
- Computing devices: Notebook PC, Webpad
- Consumer devices: LCD-TV, digital picture frame, digital
camera
• Industrial and medical light and proximity sensing
FN6467 Rev 6.00
May 1, 2014
Page 1 of 19
ISL29011
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
ISL29011IROZ-T7
ISL29011IROZ-EVALZ
NOTES:
1. Please refer to
TB347
for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and NiPdAu
plate - e4 termination finish, which is 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.
3. For Moisture Sensitivity Level (MSL), please see device information page for
ISL29011.
For more information on MSL, please see tech brief
TB477.
TEMP. RANGE
(°C)
-40 to +85
Evaluation Board
PACKAGE
Tape and Reel
(Pb-Free)
8 Ld ODFN
PKG.
DWG. #
L8.2.1x2.0
Pin Configuration
ISL29011
(8 LD ODFN)
TOP VIEW)
VDDD 1
VDDA 2
GND 3
REXT 4
8 IRDR
7 INT
6 SDA
5 SCL
EXPOSED PAD CAN BE CONNECTED TO GND OR
ELECTRICALLY ISOLATED
Pin Descriptions
PIN NUMBER
1
2
3
4
5
6
7
8
PIN NAME
VDDD
VDDA
GND
REXT
SCL
SDA
INT
IRDR
Positive digital supply: 2.25V to 3.63V.
Positive analog supply: 2.25V to 3.63V, VDDA and VDDD should be externally shorted.
Ground. The thermal pad is also connected to the GND pin.
External resistor pin setting the internal reference current and the conversion time. 499kΩ with a 1% tolerance resistor
is recommended.
I
2
C serial clock line
I
2
C serial data line
Interrupt pin; LO for interrupt/alarming. The INT pin is an open drain.
IR LED driver pin connecting to the anode of the external IR LED. The source current of the IR LED driver can be
programmed through I
2
C.
Exposed pad connected to ground or electrically isolated.
The I
2
C bus lines can be pulled from 1.7V to above V
DD
, 3.63V max.
DESCRIPTION
FN6467 Rev 6.00
May 1, 2014
Page 2 of 19
ISL29011
Block Diagram
VDDA
2
PHOTODIODE
ARRAY
COMMAND
REGISTER
LIGHT DATA
PROCESS
ALS AND IR
INTEGRATION
ADC
DATA
REGISTER
6
IR PHOTODIODE
ARRAY
IREF
INTERRUPT
FOSC
7
INT
I
2
C
5
SDA
SCL
VDDD
1
ISL29011
4
REXT
3
GND
IR DRIVER
8
IRDR
FN6467 Rev 6.00
May 1, 2014
Page 3 of 19
ISL29011
Absolute Maximum Ratings
(T
A
= +25°C)
V
SUP(VDDD,VDDA)
Supply Voltage between V
DD
and GND . . . . . . . . . . . . 4V
V
DDA
Supply Voltage between V
DDA
and GND . . . . . . . . . . . . . V
DDD
± 0.5V
I
2
C Bus (SCL, SDA) and INT Pin Voltage . . . . . . . . . . . . . . . . . . . -0.2V to 4V
I
2
C Bus (SCL, SDA) and INT Pin Current . . . . . . . . . . . . . . . . . . . . . . <10mA
IRDR Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.2V to V
DD
+ 0.5V
R
EXT
Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-0.2V to VDD + 0.5V
ESD Rating
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3kV
Thermal Information
Thermal Resistance (Typical) . . . . . . . . . . . . .
JA
(°C/W)
JC
(°C/W)
8 Ld ODFN (Notes 4, 5) . . . . . . . . . . . . . . . .
88
14
Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +90°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Pb-Free Reflow Profile (*) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see
TB477
*Peak temperature during solder reflow +235°C max
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product
reliability and result in failures not covered by warranty.
NOTE:
4.
JA
is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech
Brief
TB379.
5. For
JC
, the “case temp” location is the center of the exposed metal pad on the package underside.
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: T
J
= T
C
= T
A
Electrical Specifications
specified.
PARAMETER
V
SUP
SR_V
DD
I
SUP(OFF)
I
SUP(ON)
f
OSC
t
int
F
I2C
DATA_0
DATA_FS
DATA
DATA
DATA_1
DATA_2
DATA_3
DATA_4
DATA_IR1
DATA_IR2
DATA_IR3
DATA_IR4
V
REF
DESCRIPTION
V
SUP(VDDD,VDDA)
= 3V, T
A
= +25°C, R
EXT
= 499kΩ 1% tolerance, 16-bit ADC operation, unless otherwise
MIN
(Note 10)
2.25
0.5
0.1
70
675
16-bit ADC data
750
90
1 to 400
E = 0 lux
1
5
65535
Ambient light sensing
±10
0.5
90
825
MAX
(Note 10)
3.63
TEST CONDITIONS
(Note 6)
VDD rising edge between 0.4V and 2.25V
Software disabled or auto power-down
TYP
UNITS
V
V/ms
µA
µA
kHz
ms
kHz
Counts
Counts
%
Power Supply Range for V
DDD
, V
DDA
Required Input Power-up Slew Rate
Supply Current when Powered Down
Supply Current of Ambient Light and
IR Sensing
Internal Oscillator Frequency
ADC Integration/Conversion Time
I
2
C Clock Rate Range
Count Output When Dark
Full Scale ADC Code
Count Output Variation Over Three
Light Sources: Fluorescent,
Incandescent and Sunlight
Light Count Output With LSB of
0.015 lux/count
Light Count Output With LSB of
0.06 lux/count
Light Count Output With LSB of
0.24 lux/count
Light Count Output With LSB of
0.96 lux/count
Infrared Count Output
Infrared Count Output
Infrared Count Output
Infrared Count Output
Voltage of R
EXT
Pin
E = 300 lux, Fluorescent light (Note 7), Ambient
light sensing, Range 1 (1k lux)
E = 300 lux, Fluorescent light (Note 7), Ambient
light sensing, Range 2 (4k lux)
E = 300 lux, Fluorescent light (Note 7), Ambient
light sensing, Range 3 (16k lux)
E = 300 lux, Fluorescent light (Note 7), Ambient
light sensing, Range 4 (64k lux)
E = 210 lux, Sunlight (Note 8), IR sensing, Range 1
E = 210 lux, Sunlight (Note 8), IR sensing, Range 2
E = 210 lux, Sunlight (Note 8), IR sensing, Range 3
E = 210 lux, Sunlight (Note 8), IR sensing, Range 4
15000
20000
5000
1250
312
25000
Counts
Counts
Counts
Counts
15000
20000
5000
1250
312
0.52
25000
Counts
Counts
Counts
Counts
V
FN6467 Rev 6.00
May 1, 2014
Page 4 of 19
ISL29011
Electrical Specifications
specified. (Continued)
PARAMETER
I
INT
I
IRDR1
I
IRDR2
I
IRDR3
I
IRDR4
V
IRLED
t
r
t
f
f
IRLED1
f
IRLED2
DESCRIPTION
V
SUP(VDDD,VDDA)
= 3V, T
A
= +25°C, R
EXT
= 499kΩ 1% tolerance, 16-bit ADC operation, unless otherwise
MIN
(Note 10)
4
IS<1:0> = 0
(Note 9)
IS<1:0> = 1
(Note 9)
IS<1:0> = 2
(Note 9)
IS<1:0> = 3
(Note 9)
IRDR = 90mA, IS<1:0> = 0 (Note 9)
R
LOAD
= 15Ω at IRDR pin, 20% to 80%
R
LOAD
= 15Ω at IRDR pin, 80% to 20%
Frequency = 0 (Note 9)
Frequency = 1 (Note 9)
IS<1:0> = 0, Frequency = 0 (Note 9)
IS<1:0> = 0, Frequency = 1 (Note 9)
15Ω at IRDR pin
44
MAX
(Note 10)
TEST CONDITIONS
TYP
5
100
50
25
12.5
V
DD
- 1.0
35
10
DC
360
101
51
50
UNITS
mA
mA
INT Current Sinking Capability
IRDR Source Current
IRDR Source Current
IRDR Source Current
IRDR Source Current
Voltage Head Room of IRDR Pin
Rise Time for IRDR Source Current
Fall Time for IRDR Source Current
IR LED Modulation Frequency
IR LED Modulation Frequency
58
mA
mA
mA
V
ns
ns
kHz
kHz
mA
mA
%
%
I
SUP (IRLED1)
Supply Current of Proximity Sensing
I
SUP (IRLED2)
Supply Current of Proximity Sensing
Duty Cycle
PROX-IR
PROX
NOTES:
Duty Cycle of IR LED Modulation
Differential ADC Output of IR and
Proximity Sensing With Object Far
Away to Provide No Reflection
IR and proximity sensing with Range 2 and
Scheme 0; 15Ω @ IRDR pin, IS<1:0> = 0,
Frequency = 0; E = 210 lux, Sunlight.
1.0
6. V
SUP
is the common voltage to V
DDD
and V
DDA.
7. 550nm green LED is used in production test. The 550nm LED irradiance is calibrated to produce the same DATA count against an illuminance level
of 300 lux fluorescent light.
8. 850nm infrared LED is used in production test. The 850nm LED irradiance is calibrated to produce the same DATA_IR count against an illuminance
level of 210 lux sunlight at sea level.
9. See “Register Set” on page 10.
I
2
C Electrical Specifications
tolerance, 16-bit ADC operation.
PARAMETER
V
I
2
C
f
SCL
V
IL
V
IH
V
hys
V
OL
I
i
t
SP
t
AA
DESCRIPTION
For SCL and SDA unless otherwise noted, V
SUP(VDDD,VDDA)
= 3V, T
A
= +25°C, R
EXT
= 499kΩ 1%
MIN
(Note 10)
1.7
MAX
(Note 10)
3.63
400
0.55
1.25
0.05V
DD
0.4
-10
10
50
900
TEST CONDITIONS
TYP
UNITS
V
kHz
V
V
V
V
µA
ns
ns
Supply Voltage Range for I
2
C Interface
SCL Clock Frequency
SCL and SDA Input Low Voltage
SCL and SDA Input High Voltage
Hysteresis of Schmitt Trigger Input
Low-Level Output Voltage (Open-drain) at
4mA Sink Current
Input Leakage for Each SDA, SCL Pin
Pulse Width of Spikes that must be
Suppressed by the Input Filter
SCL Falling Edge to SDA Output Data Valid
FN6467 Rev 6.00
May 1, 2014
Page 5 of 19
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