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ISL29027 Folha de dados(PDF) 1 Page - Intersil Corporation

Nome de Peças ISL29027
Descrição Electrónicos  Proximity Sensor with Intelligent Interrupt and Sleep Modes
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Fabricante Electrônico  INTERSIL [Intersil Corporation]
Página de início  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL29027 Folha de dados(HTML) 1 Page - Intersil Corporation

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Proximity Sensor with Intelligent Interrupt and Sleep Modes
ISL29027
The ISL29027 is an integrated infrared light-to-digital converter
with a built-in IR LED driver and I2C Interface (SMBus Compatible).
The flexible interrupt scheme is designed for minimal
microcontroller utilization.
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 ISL29027 provides 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 ISL29027 uses both a hardware pin and software bits to
indicate an interrupt event has occurred. A proximity interrupt is
defined as a measurement over a threshold limit. The user may
also require that proximity interrupts occur at once, up to 16
times in a row before activating the interrupt pin.
The ISL29027 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
- Mobile Devices: Smart Phone, PDA, GPS
- Computing Devices: Laptop PC, Netbook
- Consumer Devices: LCD-TV, Digital Picture Frame, Digital
Camera
Features
• Works Under All Light Sources Including Sunlight
• Intelligent Interrupt Scheme Simplifies μC Code
Proximity Sensing
• Proximity Sensor with Broad IR Spectrum
- Can Use 850nm and 950nm External IR LEDs
•IR LED Driver with I2C Programmable Sink Currents
-Net 100μs Pulse with 110mA or 220mA Amplitudes
- Periodic Sleep Time up to 800ms Between Pulses
• Ambient IR Noise Cancellation (Including Sunlight)
Intelligent and Flexible Interrupts
• Proximity Interrupt Thresholds
• Adjustable Interrupt Persistency
- 1/4/8/16 Consecutive Triggers Required Before Interrupt
Ultra Low Power
•138μA DC Typical Supply Current for Prox Sensing
-110μA for Sensors and Internal Circuitry
-28μA Typical Current for External IR LED (Assuming 220mA
for 100μs Every 800ms)
•<1.0μA Supply Current When Powered Down
Easy to Use
• Set Registers; Wait for Interrupt
•I2C (SMBus Compatible) Output
• Temperature Compensated
• Tiny ODFN8 2.0x2.1x0.7 (mm) Package
Additional Features
• 1.7V to 3.63V Supply for I2C Interface
• 2.25V to 3.63V Sensor Power Supply
• Pb-Free (RoHS Compliant)
•I2C Address Selection Pin
REXT
GND
SCL
IR PHOTODIODE
LIGHT DATA
4
3
5
2
FOSC
IREF
IRDR
ARRAY
PROCESS
ALS AND IR
CHANNEL
ADC
8
INT
7
COMMAND
REGISTER
DATA
REGISTER
I2C
IR DRIVER
INTERRUPT
SDA
6
ADDR0
1
FIGURE 1. BLOCK DIAGRAM
February 7, 2011
FN7815.0
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. 2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.


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