|
|
PDF ISL29021 Data sheet ( Hoja de datos )
| Número de pieza | ISL29021 | |
| Descripción | Digital Proximity Sensor | |
| Fabricantes | Intersil Corporation | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ISL29021 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
|
No Preview Available !
®
Data Sheet
March 3, 2009
ISL29021
FN6732.0
Digital Proximity Sensor with Interrupt
Function
www.TdahteasISheLe2t94u0.2c1omis an integrated proximity and infrared sensor
with a built-in IR LED driver and I2C Interface (SMBus
Compatible). This device provides infrared sensing to allow
proximity estimation featured with interrupt function.
For infrared and proximity sensing, an internal ADC has
been designed based on the charge-balancing A/D
conversion technique.
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.
Four different modes of operation can be selected via the I2C
interface: programmable IR sensing once, programmable
proximity sensing once, 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 0.5µA.
The ISL29021 supports both hardware and software
interrupts that remain asserted until the host clears it through
I2C interface for proximity detection.
Designed to operate on supplies from 2.5V to 3.63V, the
ISL29021 is specified for operation over the -40°C to +85°C
ambient temperature range. It is packaged in a clear, Pb-free
8 Ld ODFN package.
Ordering Information
PART NUMBER
(Note)
TEMP. RANGE PACKAGE PKG.
(°C) (Pb-Free) DWG. #
ISL29021IROZ-T7*
-40 to +85 8 Ld ODFN L8.2.1x2.0
ISL29021IROZ-EVALZ Evaluation Board
*Please refer to TB347 for details on reel specifications.
NOTE: 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.
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
• Selectable Range (via I2C)
• Works Under Various Light Sources, Including Sunlight
Ideal Spectral Response for Proximity Sensor
• Proximity sensor range from 850nm to 950nm
- Can use either 850nm or 950nm LED solution
Ultra Low Power
• 90μA Max Operating Current
• Software Shutdown and Automatic Shutdown
- 0.5μA Max Shutdown Current
Easy to Use
• I2C (SMBus Compatible) Output
• No Complex Algorithms Needed
• Temperature Compensated
• Small Form Factor
- 8 Ld 2.0mmx2.1mmx0.7mm ODFN Package
Additional Features
• I2C and SMBus Compatible
• 1.7V to 3.63V Supply for I2C Interface
• 2.25V to 3.63V Sensor Power Supply
• Pb-Free (RoHS compliant)
Applications
• Display and Keypad 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 Proximity Sensing
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2009. All Rights Reserved.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL29021
of the interrupt. An unexpected camera flash, for example,
can be ignored by setting the persistency to 8 integration
cycles.
I2C Interface
There are eight 8-bit registers available inside the ISL29021.
The two command registers define the operation of the device.
www.Tdahteaschoemetm4ua.ncdomregisters do not change until the registers are
overwritten. The two 8-bit data Read Only registers are for the
ADC output and the Timer output. The data registers contain
the ADC's latest digital output, or the number of clock cycles in
the previous integration period. The four 8-bit interrupt registers
hold 16-bit interrupt high and low thresholds.
The ISL29021’s I2C interface slave address is internally hard-
wired as 1000100. When 1000100x with x as R or W is sent
after the Start condition, this device compares the first seven
bits of this byte to its address and matches.
Figure 1 shows a sample one-byte read. Figure 2 shows a
sample one-byte write. The I2C bus master always drives
the SCL (clock) line, while either the master or the slave can
drive the SDA (data) line. Figure 2 shows a sample write.
Every I2C transaction begins with the master asserting a
start condition (SDA falling while SCL remains high). The
following byte is driven by the master, and includes the slave
address and read/write bit. The receiving device is
responsible for pulling SDA low during the
acknowledgement period. Every I2C transaction ends with
the master asserting a stop condition (SDA rising while SCL
remains high).
For more information about the I2C standard, please consult
the Philips™ I2C specification documents.
I2C DATA START
DEVICE ADDRESS W A REGISTER ADDRESS
STOP START DEVICE ADDRESS
A
DATA BYTE0
I2C SDA
IN
I2C SDA
OUT
A6 A5 A4 A3 A2 A1 A0 W A R7 R6 R5 R4 R3 R2 R1 R0 A
SDA DRIVEN BY MASTER
A SDA DRIVEN BY MASTER A
A6 A5 A4 A3 A2 A1 A0 W A
SDA DRIVEN BY ISL29021
SDA DRIVEN BY MASTER
A D7 D6 D5 D4 D3 D2 D1 D0
I2C CLK
12 3456 789123456 789
123 45 67 89123456789
FIGURE 1. I2C READ TIMING DIAGRAM SAMPLE
I2C DATA
I2C SDA IN
I2C SDA OUT
I2C CLK IN
START
DEVICE ADDRESS
W A REGISTER ADDRESS
A FUNCTIONS
A STOP
A6 A5 A4 A3 A2 A1 A0 W A R7 R6 R5 R4 R3 R2 R1 R0 A B7 B6 B5 B4 B3 B2 B1 B0 A
SDA DRIVEN BY MASTER
A SDA DRIVEN BY MASTER A SDA DRIVEN BY MASTER
A
1 234 5 67 8 9 1234 56 7 8 9 12 345 67 89
FIGURE 2. I2C WRITE TIMING DIAGRAM SAMPLE
5 FN6732.0
March 3, 2009
5 Page 
ISL29021
Typical Performance Curves VSUP (VDDD, VDDA) = 3V, REXT = 499kΩ (Continued)
www.datasheet4u.com
105.0
104.5
104.0
PROXIMITY SENSING
IS<1:0> = 0
103.5
103.0
102.5
102.0
101.5
101.0
100.5
100.0
-40 -20
0 20 40 60 80
TEMPERATURE (¬×C
100 120
FIGURE 11. OUTPUT CURRENT vs TEMPERATURE IN PROXIMITY SENSING
2.10
1
2.00
2
0.40
3
4
8
7
6
0.54
5
0.37
FIGURE 12. 8 LD ODFN SENSOR LOCATION OUTLINE
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems.
Intersil Corporation’s quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without
notice. 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.
For information regarding Intersil Corporation and its products, see www.intersil.com
11 FN6732.0
March 3, 2009
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet ISL29021.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ISL29020 | A Low Power High Sensitivity / Light-to Digital Sensor | Intersil Corporation |
| ISL29021 | Digital Proximity Sensor | Intersil Corporation |
| ISL29023 | Ntegrated Digital Ambient Light Sensor | Intersil Corporation |
| ISL29027 | Proximity Sensor |  Intersil |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |