1

Integrated Digital Light Sensor with Interrupt

ISL29035

The ISL29035 is an integrated ambient and infrared

Its advanced self-calibrated photodiode array emulates human

eye response with excellent IR rejection. The on-chip ADC is

capable of rejecting 50Hz and 60Hz flicker caused by artificial

light sources. The Lux range select feature allows users to

program the Lux range for optimized counts/Lux.

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

designed based upon the charge-balancing technique. The

ADC conversion time is nominally 90ms and is user adjustable

from 11µs to 90ms, depending on oscillator frequency and

ADC resolution. In normal operation, typical current

consumption is 57µA. In order to further minimize power

consumption, two power-down modes have been provided. If

polling is chosen over continuous measurement of light, the

auto-power-down function shuts down the whole chip after

each ADC conversion for the measurement. The other

interface. The power consumption can be reduced to less than

0.3µA when powered down.

The ISL29035 supports a software brownout condition

detection. The device powers up with the brownout bit asserted

The ISL29035 supports a software and hardware interrupt that

interface. Function of ADC conversion continues without

stopping after interrupt is asserted.

supply from 1.7V to 3.63V, the ISL29035 is specified for

operation over the -40°C to +85°C ambient temperature range.

Features

• Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-bits ADC

• Wide dynamic range . . . . . . . . . . . . . . . . . . . . . . .1:4,200,000

• Integrated noise reduction . . . . . . . . . . . . . . . . . . . . . 50/60Hz

• Close to human eye response with excellent IR/UV rejection

• Shutdown modes . . . . . . . . . . . . . . . .Software and Automatic

• Programmable interrupt threshold with persistence filter

• Supply current (typ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57µA

• Shutdown current (max) . . . . . . . . . . . . . . . . . . . . . . . . . .0.3µA

• Sensor power supply . . . . . . . . . . . . . . . . . . . . . 2.25V to 3.63V

• Operating temperature range. . . . . . . . . . . . . -40°C to +85°C

• Small form factor package . . . . . . . 6 Ld 1.5x1.6x0.75 ODFN

Applications

• Mobile devices: smart phone, PDA, GPS

• Computing devices: notebook PC, MacBook, tablets

• Consumer devices: LCD-TV, digital camera

• Industrial and medical light sensing

FIGURE 1. ISL29035 TYPICAL APPLICATION DIAGRAM

ISL29035

MCU

1µF

SCL

SDA

6

5

1

2

4

VDD

GND

SCL

SDA

GPIO

4.7k

Ω

INT

VDD_PULLUP

3

NC

4.7k

Ω 4.7kΩ

VDD

100

Ω

September 18, 2013

FN8371.0

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

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

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