ISL29028AIROZ-T7 Intersil, ISL29028AIROZ-T7 Datasheet

ISL29028AIROZ-T7

Manufacturer Part Number

ISL29028AIROZ-T7

Description

IC SENSOR LIGHT-PROXIMITY 8ODFN

Manufacturer

Intersil

Datasheet

1.ISL29028AIROZ-T7.pdf (16 pages)

Specifications of ISL29028AIROZ-T7

Rohs Compliant

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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Low Power Ambient Light and Proximity Sensor with

Intelligent Interrupt and Sleep Modes

ISL29028A

The ISL29028A is an integrated ambient and infrared light-to-

digital converter with a built-in IR LED driver 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 external 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 ISL29028A provides low power operation of ALS and proximity

sensing with a typical 138μA normal operation current (110μA for

sensors and internal circuitry, ~28μA for external LED) with 220mA

current pulses for a net 100μs, repeating every 800ms (or under).

The ISL29028A uses both a hardware pin and software bits to

indicate an interrupt event has occurred. An ALS interrupt is

defined as a measurement which 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 ISL29028A 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 lead ODFN package.

Applications

• Display and Keypad Dimming Adjustment and Proximity Sensing

• Industrial and Medical Light and Proximity Sensing

March 24, 2011

FN7721.2

for:

- Mobile Devices: Smart Phone, PDA, GPS

- Computing Devices: Laptop PC, Netbook

- Consumer Devices: LCD-TV, Digital Picture Frame, Digital

Camera

C Interface

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

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

Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.

Features

• Works Under All Light Sources Including Sunlight

• Dual ADCs Measure ALS/Prox Concurrently

• Intelligent Interrupt Scheme Simplifies μC Code

• 0.5% Typical Nonlinearity

Ambient Light Sensing

• Simple Output Code Directly Proportional to lux

• 50Hz/60Hz Flicker Noise and IR Rejection

• Light Sensor Close to Human Eye Response

• Selectable 125/2000 Lux Range

Proximity Sensing

• Proximity Sensor with Broad IR Spectrum

• IR LED Driver with I

• Ambient IR Noise Cancellation (Including Sunlight)

Intelligent and Flexible Interrupts

• Independent ALS/Prox Interrupt Thresholds

• Adjustable Interrupt Persistency

Ultra Low Power

• 138μA DC Typical Supply Current for ALS/Prox Sensing

• <1.0μA Supply Current When Powered Down

Easy to Use

• Set Registers; Wait for Interrupt

• I

• Temperature Compensated

• Tiny ODFN8 2.0x2.1x0.7 (mm) Package

Additional Features

• 1.7V to 3.63V Supply for I

• 2.25V to 3.63V Sensor Power Supply

• Pb-Free (RoHS Compliant)

• I

- Can Use 850nm and 950nm External IR LEDs

- Net 100μs Pulse with 110mA or 220mA Amplitudes

- Periodic Sleep Time up to 800ms Between Pulses

- 1/4/8/16 Consecutive Triggers Required Before Interrupt

- 110μA for Sensors and Internal Circuitry

- 28μA Typical Current for External IR LED (Assuming 220mA

C (SMBus Compatible) Output

C Address Selection Pin

for 100μs Every 800ms)

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

C Programmable Sink Currents

C Interface

Related parts for ISL29028AIROZ-T7

ISL29028AIROZ-T7 Summary of contents

Page 1

... CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. | 1-888-INTERSIL or 1-888-468-3774 Copyright Intersil Americas Inc. 2010, 2011. All Rights Reserved Intersil (and design trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners Programmable Sink Currents ...

Page 2

... PAD CAN BE CONNECTED TO GND OR ELECTRICALLY ISOLATED Ordering Information PART NUMBER (Notes ISL29028AIROZ-T7 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 ...

Page 3

... ISL29028A Thermal Information (T = +25 C) ° A Thermal Resistance (Typical ODFN Package (Notes Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +90°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp = Ω = 3.0V +25° 499k 1% tolerance. A EXT CONDITION V Rising Edge between 0.4V and 2.25V DD ALS_EN = 0 ...

Page 4

Electrical Specifications V DD PARAMETER DESCRIPTION I IRDR Sink Current IRDR_0 I IRDR Sink Current IRDR_1 I IRDR Leakage Current IRDR_LEAK V Acceptable Voltage Range on IRDR Pin IRDR t Net I On Time Per PROX Reading PULSE IRDR V ...

Page 5

I C Electrical Specifications (Note 13). (Continued) PARAMETER DESCRIPTION t Data Hold Time HD:DAT t Data Set-up Time SU:DAT t Rise Time of both SDA and SCL Signals R t Fall Time of both SDA and SCL Signals F ...

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

TABLE 4. REGISTER 0x02 (INTERRUPT) - PROX/ALS INTERRUPT CONTROL BIT # ACCESS DEFAULT BIT NAME PROX_FLAG 7 FLAG 0x00 (Prox Flag) PROX_PRST 6:5 RW 0x00 (Prox Persist) Unused 4 RW 0x00 (Write 0) ALS_FLAG 3 FLAG 0x00 (ALS FLAG) ALS_PRST ...

Page 8

TABLE 11. REGISTER 0x09 (ALSIR_DT1) - ALS/IR SENSOR DATA (LOWER 8 BITS) BIT # ACCESS DEFAULT 7:0 RO 0x00 TABLE 12. REGISTER 0x0A (ALSIR_DT2) - ALS/IR SENSOR DATA (UPPER 4 BITS) BIT # ACCESS DEFAULT 7:4 RO 0x00 3:0 RO ...

Page 9

ALS ACTIVE PROX SENSOR ACTIVE IRDR (CURRENT DRIVER) FIGURE 3. TIMING DIAGRAM FOR PROX/ALS EVENTS - NOT TO SCALE The proximity sensor is an 8-bit ADC which operates in a similar fashion. When proximity sensing is enabled, the IRDR pin ...

Page 10

... DD After power-up the user’s power supply temporarily deviates from our specification (2.25V to 3.63V), Intersil recommends the user write the following: write 0x00 to register 0x01, write 0x29 to register 0x0F, write 0x00 to register 0x0E, and write 0x00 to register 0x0F ...

Page 11

... Guidelines for Optical Dual FlatPack No Lead (ODFN) Package” before starting ODFN product board mounting (http://www.intersil.com/data/tb/TB477.pdf) Layout Considerations The ISL29028A is relatively insensitive to layout. Like other I devices intended to provide excellent performance even in significantly noisy environments. There are only a few considerations that will ensure best performance. ...

Page 12

Typical Performance Curves 1.0 0.9 0.8 0.7 0.6 0.5 SUN 0.4 0.3 0.2 0.1 0 350 550 WAVELENGTH (nm) FIGURE 6. SPECTRUM OF FOUR LIGHT SOURCES NORMALIZED BY LUMINOUS INTENSITY (LUX) 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 ...

Page 13

Typical Performance Curves 240 220mA-MODE (PROX_DR = 1) 220 200 180 160 140 120 110mA-MODE (PROX_DR = 0) 100 0 0.5 1.0 1.5 2.0 2.5 V (V) IRDR FIGURE 12. IRDR PULSE AMPLITUDE vs V FIGURE 14. STABILITY OF ALS ...

Page 14

FIGURE 15 ODFN SENSOR LOCATION OUTLINE - DIMENSIONS ISL29028A 2.10 0. 0.50 5 FN7721.2 March 24, 2011 ...

Page 15

... Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. ...

Page 16

Package Outline Drawing L8.2.1x2.0 8 LEAD OPTICAL DUAL FLAT NO-LEAD PLASTIC PACKAGE (ODFN) Rev 3, 1/11 2.10 6 PIN 1 INDEX AREA (2X) 0.10 TOP VIEW 2.50 2.10 (6x0.50) (8x0.20) (8x0.55) (0.75) TYPICAL RECOMMENDED LAND PATTERN 16 ISL29028A A 0.15 ...

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