ISL29035 Datasheet, PDF (1/2 Pages) Cooper Bussmann, Inc. – Integrated Digital Light Sensor with Interrupt

Integrated Digital Light Sensor with Interrupt
ISL29035
The ISL29035 is an integrated ambient and infrared
light-to-digital converter with I²C (SMBus Compatible) Interface.
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
power-down mode is controlled by software via the I²C
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
until the host clears it through the I²C interface.
The ISL29035 supports a software and hardware interrupt that
remains asserted until the host clears it through the I²C
interface. Function of ADC conversion continues without
stopping after interrupt is asserted.
Designed to operate on supplies from 2.25V to 3.63V with an I²C
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
• I²C (SMB compatible) power supply . . . . . . . . . 1.7V to 3.63V
• 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
VDD_PULLUP
100Ω
VDD
1µF
4.7kΩ 4.7kΩ 4.7kΩ
1
SDA
6 SDA
VDD
MCU ^SCL
5 SCL ISL29035 NC 3
GPIO
4 INT
GND
2
FIGURE 1. ISL29035 TYPICAL APPLICATION DIAGRAM
September 18, 2013
1
FN8371.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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