ISL29043IROMZ-EVALZ INTERSIL [Intersil Corporation], ISL29043IROMZ-EVALZ Datasheet

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ISL29043IROMZ-EVALZ

Manufacturer Part Number
ISL29043IROMZ-EVALZ
Description
Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital Output
Manufacturer
INTERSIL [Intersil Corporation]
Datasheet
Low Power Ambient Light and Proximity Sensor with
Internal IR-LED and Digital Output
ISL29043
The ISL29043 is an integrated ambient and infrared
light-to-digital converter with a built-in IR LED and I
(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 540μs
conversion time.
The ISL29043 provides low power operation of ALS and
proximity sensing with a typical 136μA normal operation
current (110μA for sensors and internal circuitry, ~28μA for
LED) with 220mA current pulses for a net 100μs, repeating
every 800ms (or under).
The ISL29043 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 ISL29043 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 10 Ld ODFN package.
February 9, 2012
FN7935.0
C2
1µF
V
DD
C3
0.1µF
C1
1.0µF
V
LED
R
499kΩ
1 LED+ LED-
2
3 V
4
5
EXT
FIGURE 1. TYPICAL APPLICATION DIAGRAM
ADDR0
GND
REXT
ISL29043
SLAVE_0
DD
IRDR
SDA
SCL
INT
10
9
8
7
6
10kΩ
R1
1
SLAVE_1
R2
10kΩ
SDA
SCL
R3
10kΩ
I
2
C SLAVE_n
V
I2C
2
C Interface
PULL-UP
SDA
SCL
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
µCONTROLLER
INT
SDA
SCL
I
2
C MASTER
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
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
Applications
• Display and Keypad Dimming Adjustment and Proximity
Related Literature
• See AN1436, “Proximity Sensors”
- 1/4/8/16 Consecutive Triggers Required Before Interrupt
Sensing for:
- Mobile Devices: Smart Phone, PDA, GPS
- Computing Devices: Laptop PC, Netbook, Tablet PC
- Consumer Devices: LCD-TV, Digital Picture Frame, Digital
- Industrial and Medical Light and Proximity Sensing
Camera
All other trademarks mentioned are the property of their respective owners.
255
204
153
102
51
0
0
FIGURE 2. PROXIMITY RESPONSE vs DISTANCE
25
|
Copyright Intersil Americas Inc. 2012. All Rights Reserved
110mA (18% GREY CARD)
220mA (18% GREY CARD)
50
110mA (WHITE COPY PAPER)
DISTANCE (mm)
220mA (WHITE COPY PAPER)
75
100
125
150

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ISL29043IROMZ-EVALZ Summary of contents

Page 1

Low Power Ambient Light and Proximity Sensor with Internal IR-LED and Digital Output ISL29043 The ISL29043 is an integrated ambient and infrared light-to-digital converter with a built-in IR LED and I (SMBus Compatible). This device uses two independent ADCs for ...

Page 2

... Ordering Information PART NUMBER (Notes ISL29043IROMZ-T7 ISL29043IROMZ-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, NiPdAu plate (e4 termination finish), which are all RoHS compliant ...

Page 3

Absolute Maximum Ratings V Supply Voltage between V and GND . . . . . . . . . . . . . . . . . . . . . .4. Bus Pin Voltage ...

Page 4

Electrical Specifications 3.0V +25°C, R EXT = 499kΩ 1% tolerance. (Continued) PARAMETER DESCRIPTION t Net I On Time Per PROX Reading PULSE IRDR V Voltage of R Pin REF EXT ...

Page 5

I C Electrical Specifications (Note 11). (Continued) PARAMETER DESCRIPTION t Hold Time (Repeated) START Condition HD:STA t LOW Period of the SCL Clock LOW t HIGH period of the SCL Clock HIGH t Set-up Time for a Repeated START ...

Page 6

Register Map There are ten 8-bit registers accessible via I store the various ALS/IR/Prox thresholds, which trigger interrupt events. Registers 0x8 through 0xA store the results of ALS/IR/Prox ADC conversions. ADDR REG NAME 7 0x00 (n/a) 0x01 CONFIGURE PROX EN ...

Page 7

Register Descriptions BIT # ACCESS DEFAULT 7:0 RO (n/a) TABLE 3. REGISTER 0x01 (CONFIGURE) - PROX/ALS CONFIGURATION BIT # ACCESS DEFAULT NAME PROX_EN 7 RW 0x00 (Prox Enable) PROX_SLP 6:4 RW 0x00 (Prox Sleep) PROX_DR 3 RW 0x00 (Prox Drive) ...

Page 8

TABLE 6. REGISTER 0x04 (PROX_HT) - INTERRUPT HIGH THRESHOLD FOR PROXIMITY SENSOR BIT # ACCESS DEFAULT BIT NAME PROX_HT 7:0 RW 0xFF (Prox Threshold) TABLE 7. REGISTER 0x05 (ALSIR_TH1) - INTERRUPT LOW THRESHOLD FOR ALS/IR BIT # ACCESS DEFAULT 7:0 ...

Page 9

START DEVICE ADDRESS DATA SDA MASTER SDA SLAVE (ISL29043) SDA DRIVEN BY MASTER ...

Page 10

Ambient Light and IR Sensing The ISL29043 is set for ambient light sensing when Register bit ALSIR_MODE = 0 and ALS_EN = 1. The light-wavelength response of the ALS appears as shown in Figure 11. ALS measuring mode (as opposed ...

Page 11

In Equation the calculated lux reading and OUT calc represents the ADC code. The constant α to plug in is determined by the range bit ALS_RANGE (register 0x1 bit 1) and is independent of the light source ...

Page 12

NO BAFFLE, 0.1mm FROM GLASS 200 AGAINST GLASS, NO BAFFLE 150 NO COVER GLASS 100 GLASS W/ BAFFLE DISTANCE (mm) FIGURE 8. PROXIMITY COMPARISON WITHOUT LIGHT BAFFLE (IRDR = 110mA) Typical ...

Page 13

LED SLAVE_0 1 LED+ C1 1.0µF 2 ADDR0 1µF 0.1µF GND 5 REXT REXT ISL29043 499kΩ Typical Performance Curves 1.0 0.9 FLUORESCENT 0.8 0.7 0.6 HALOGEN 0.5 SUN 0.4 0.3 0.2 ...

Page 14

Typical Performance Curves 255 204 110mA (18% GREY CARD) 220mA (18% GREY CARD) 153 110mA (WHITE COPY PAPER) 102 220mA (WHITE COPY PAPER DISTANCE (mm) FIGURE 14. PROX COUNTS vs DISTANCE WITH 10cmx10cm REFLECTORS ...

Page 15

Typical Performance Curves Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you have the latest Rev. DATE REVISION February 9, 2012 ...

Page 16

Package Outline Drawing L10.2.1X3.5E 10 LEAD OPTICAL CO-PACKAGE Rev 2, 1/12 2.10 6 0.36 PIN 1 INDEX AREA ISL29028 0.90 29030 (4X) 0.10 TOP VIEW SEE DETAIL "X" BASE PLANE SEATING PLANE SIDE VIEW REF ...

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