1

®

FN6522.0

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

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Copyright © Intersil Americas Inc. 2008. All Rights Reserved.

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ISL29015

Integrated Digital Ambient Light Sensor

and Proximity Sensor

The ISL29015 is an integrated ambient and infrared light to

interface. This device provides not only ambient light sensing

to allow robust backlight/display brightness control but also

infrared sensing to allow proximity estimation.

For ambient light sensing, an internal 16-bit ADC has been

designed based on the charge-balancing A/D conversion

technique. The ADC conversion time is nominally 100ms

and is user adjustable from 25µs to 100ms depends 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 emitters LEDs.

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 1µA.

Designed to operate on supplies from 2.25V to 3.3V, the

ISL29015 is specified for operation over the -40°C to +85°C

ambient temperature range. It is packaged in a clear, Pb-free

6 Ld ODFN package.

Pinout

ISL29015

(6 LD ODFN)

TOP VIEW

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 up to 16-bits

Ambient Light Sensing

• Simple Output Code Directly Proportional to lux

• Adjustable Sensitivity up to 65 Counts per lux

- 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 50/60Hz 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

-1.0μA Max Shutdown Current

• Software Shutdown and Automatic Shutdown

Easy to Use

• No Complex Algorithms Needed

• Temperature Compensated

• Small Form Factor

- 2.0x2.1x0.7mm 6 Ld ODFN Package

Additional Features

• 2.25V to 3.3V 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

1

2

3

6

5

4

VDD

GND

REXT

IRDR

SDA

SCL

*EXPOSED PAD CAN BE CONNECTED TO GND OR

ELECTRICALLY ISOLATED

Data Sheet

October 31, 2008