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Renesas Electronics Components Datasheet

ISL29044 Datasheet

Low Power Ambient Light and Proximity Sensor

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ISL29044
NORETCROEMCMOMENMDEENISDDLER2DE90PF4LO4AARCNEEMWENDTEPSAIGRNTS
Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital
Output
DATASHEET
FN8305
Rev 2.00
April 28, 2016
The ISL29044 is an integrated ambient and infrared
light-to-digital converter with a built-in IR LED and I2C Interface
(SMBus Compatible). This device uses two independent ADCs
for concurrently measuring ambient light and proximity in
parallel. The flexible interrupt scheme is designed for minimal
microcontroller utilization.
For ambient light sensor (ALS) data conversions, an ADC
converts photodiode current (with a light sensitivity range up to
2000 Lux) in 100ms per sample. The ADC rejects 50Hz/60Hz
flicker noise caused by artificial light sources.
For proximity sensor (Prox) data conversions, the built-in driver
turns on an internal infrared LED and the proximity sensor ADC
converts the reflected IR intensity to digital. This ADC rejects
ambient IR noise (such as sunlight) and has a 547μs
conversion time.
The ISL29044 provides low power operation of ALS and
proximity sensing with a typical 133μA normal operation
current (108μA for sensors and internal circuitry, ~25μA for
LED) with 220mA current pulses for a net 100μs, repeating
every 800ms (or under).
The ISL29044 uses both a hardware pin and software bits to
indicate an interrupt event has occurred. An ALS interrupt is
defined as a measurement that is outside a set window. A
proximity interrupt is defined as a measurement over a
threshold limit. The user may also require that both ALS/Prox
interrupts occur at once, up to 16 times in a row before
activating the interrupt pin.
The ISL29044 is designed to operate from 2.25V to 3.63V over
the -40°C to +85°C ambient temperature range. It is
packaged in a clear, lead-free 8 Ld ODFN package.
Features
• Internal LED + Sensor = Complete Solution
• Works under all light sources including sunlight
• Dual ADCs measure ALS/Prox concurrently
• <1.0μA Supply current when powered down
• Temperature compensated
• Pb-Free (RoHS compliant)
Intelligent and Flexible Interrupts
• Independent ALS/Prox interrupt thresholds
• Adjustable interrupt persistency
- 1/4/8/16 consecutive triggers required before interrupt
Applications
• Display and keypad dimming adjustment and proximity
sensing for:
- Mobile devices: Smart phone, PDA, GPS
- Computing devices: Laptop PC, Netbook, Tablet PC
- Consumer devices: LCD-TV, digital picture frame, digital
camera
- Industrial and medical light and proximity sensing
Related Literature
• See AN1436, “Proximity Sensors”
V_LED
V_PULLUP
I2C SLAVE 0
5 LED- LED+ 4
6 IRDR GND 3
7 INT SCL 2
8 SDA VDD 1
ISL29044 C1
0.1µF
C3
0.1µF
R1
RES1
VDD
I2C SLAVE 1 I2C SLAVE_n
C2
1µF
SCL
SCL
SDA
SDA
I2C-DIAGRAM I2C-DIAGRAM
R2
RES1
R3
RES1
I2C MASTER
SCL
SDA
INT
CONTROLLER
FIGURE 1. TYPICAL APPLICATION
100
90
80
70
60
50
40
30
20
10
00
110mA GREY
20 40
220mA WHITE
110mA WHITE
220mA GREY
60 80 100 120 140
DISTANCE (mm)
FIGURE 2. PROXIMITY RESPONSE vs DISTANCE
160
FN8305 Rev 2.00
April 28, 2016
Page 1 of 19


Renesas Electronics Components Datasheet

ISL29044 Datasheet

Low Power Ambient Light and Proximity Sensor

No Preview Available !

ISL29044
ISL29044 Block Diagram
ALS PHOTODIODE
ARRAY
VDD
1
LIGHT DATA
PROCESS
ALS AND IR
DUAL CHANNEL
ADCs
IR PHOTODIODE
ARRAY
IREF
FOSC
3
GND
4
LED+
5
LED-
COMMAND
REGISTER
DATA
REGISTER
I2C
INTERRUPT
IR DRIVER
2 SCL
8 SDA
7 INT
6 IRDR
Pin Configuration
ISL29044
(8 LD 2.36X3.94 (mm) OPTICAL CO-PACKAGE)
TOP VIEW
LED- 5
IRDR 6
INT 7
SDA 8
4 LED+
3 GND
2 SCL
1 VDD
Pin Descriptions
PIN# PIN NAME
DESCRIPTIONS
1 VDD Voltage supply 2.25V to 3.63V.
2 SCL I2C clock line can be pulled from 1.7V to above VDD,
3.63V max.
3 GND Ground
4 LED+ Anode of IR LED
5 LED- Cathode of IR LED
6 IRDR IR-LED driver pin - current flows into ISL29044 from
LED cathode.
7 INT Interrupt pin; Logic output (open-drain) for interrupt.
8 SDA I2C data line can be pulled from 1.7V to above VDD,
3.63V max.
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
TEMP. RANGE
(°C)
PACKAGE
Tape & Reel
(Pb-free)
PKG.
DWG. #
ISL29044IROMZ-T7
-40 to +85
8 Ld Optical Co-package
L8.2.36x3.94
ISL29044IROMZ-EVALZ
Evaluation Board
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, NiPdAu plate
(e4 termination finish), which are all RoHS compliant. The ISL29044 is compatible with limited SnPb and Pb-free soldering operations. The ISL29044
is MSL classified. See Tech Brief TB487 (Surface Mount Assembly Guidelines for Optical Co-Package Sensor and LED) for reflow profile and more
information.
3. For more information on MSL please see tech brief TB477.
FN8305 Rev 2.00
April 28, 2016
Page 2 of 19


Part Number ISL29044
Description Low Power Ambient Light and Proximity Sensor
Maker Renesas
Total Page 19 Pages
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