|
|
PDF ISL29030A Data sheet ( Hoja de datos )
| Número de pieza | ISL29030A | |
| Descripción | Low Power Ambient Light and Proximity Sensor | |
| Fabricantes | Intersil | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de ISL29030A (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
Low Power Ambient Light and Proximity Sensor with Intelligent
Interrupt and Sleep Modes - Analog and Digital Out
ISL29030A
The ISL29030A is an integrated ambient and infrared
light-to-digital converter with a built-in IR LED driver
and I2C Interface (SMBus Compatible). This device uses
two independent ADCs for concurrently measuring
ambient light and proximity in parallel. The flexible
interrupt scheme is designed for minimal
microcontroller utilization.
For ambient light sensor (ALS) data conversions, an ADC
converts photodiode current (with a light sensitivity
range of 2000 Lux) in 100ms per sample. The ADC
rejects 50Hz/60Hz flicker noise caused by artificial light
sources. The IALS pin provides an analog output current
proportional to the measured light (420μA FSR).
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 ISL29030A provides low power operation of ALS and
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 ISL29030A uses both a hardware pin and software
bits to indicate an interrupt event has occurred. An ALS
interrupt is defined as a measurement which is outside a
set window. A proximity interrupt is defined as a
measurement over a threshold limit. The user may also
require that both ALS/prox interrupts occur at once, up
to 16 times in a row before activating the interrupt pin.
The ISL29030A 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.
Pin Configuration
ISL29030A
8 LD ODFN (2.0X2.1X0.7MM)
TOP VIEW
Features
• Works Under All Light Sources Including Sunlight
• Dual ADCs Measure ALS/Prox Concurrently
• Intelligent Interrupt Scheme Simplifies μC Code
Ambient Light Sensing
• Simple Output Code Directly Proportional to lux
• 50Hz/60Hz Flicker Noise and IR Rejection
• Light Sensor Close to Human Eye Response
• Selectable 125/2000 Lux Range
• Analog 420μA Output Pin IALS Proportional to Lux
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
• Independent ALS/Prox Interrupt Thresholds
• Adjustable Interrupt Persistency
- 1/4/8/16 Consecutive Triggers Required Before
Interrupt
Ultra Low Power
• 138μA DC Typical Supply Current for ALS/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)
IALS 1
8 IRDR
www.DataSheet4U.coVmDD 2 THERMAL 7 INT
GND 3
PAD
6 SDA
REXT 4
5 SCL
*THERMAL PAD CAN BE CONNECTED TO GND OR
ELECTRICALLY ISOLATED
Applications
• Display and Keypad Dimming Adjustment and
Proximity Sensing for:
- Mobile Devices: Smart Phone, PDA, GPS
- Computing Devices: Laptop PC, Netbook
- Consumer Devices: LCD-TV, Digital Picture Frame,
Digital Camera
• Industrial and Medical Light and Proximity Sensing
November 18, 2010
FN7722.0
1
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. 2010. 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.
1 page  
ISL29030A
I2C Electrical Specifications For SCL and SDA unless otherwise noted, VDD = 3V, TA = +25°C, REXT = 499kΩ 1%
tolerance (Note 10). (Continued)
PARAMETER
DESCRIPTION
CONDITION
MIN TYP MAX UNIT
tLOW
LOW Period of the SCL Clock
Measured at the 30% of VDD
crossing
1300
ns
tHIGH
tSU:STA
HIGH period of the SCL Clock
Set-up Time for a Repeated START
Condition
600 ns
600 ns
tHD:DAT
tSU:DAT
tR
tF
tSU:STO
tBUF
Data Hold Time
Data Set-up Time
Rise Time of both SDA and SCL Signals (Note 11)
Fall Time of both SDA and SCL Signals
(Note 11)
Set-up Time for STOP Condition
Bus Free Time Between a STOP and START
Condition
30
100
20 + 0.1xCb
20 + 0.1xCb
600
1300
ns
ns
ns
ns
ns
ns
Cb Capacitive Load for Each Bus Line
Rpull-up SDA and SCL system bus pull-up resistor Maximum is determined by tR and tF
tVD;DAT Data Valid Time
tVD:ACK Data Valid Acknowledge Time
VnL Noise Margin at the LOW Level
VnH Noise Margin at the HIGH Level
NOTES:
10. I2C limits are based on design/simulation and are not production tested.
11. Cb is the capacitance of the bus in pF.
1
0.1VDD
0.2VDD
400 pF
kΩ
0.9 µs
0.9 µs
V
V
www.DataSheet4U.com
5
FIGURE 1. I2C TIMING DIAGRAM
FN7722.0
November 18, 2010
5 Page 
ISL29030A
back from within. As a result, the proximity count peaks
at contact and monotonically decreases as skin moves
away. The reflective characteristics of skin are very
different from that of paper.
Typical Circuit
A typical application for the ISL29030A is shown in
Figure 5. The ISL29030A’s I2C address is internally
hardwired as 0b1000100. The device can be tied onto a
system’s I2C bus together with other I2C compliant
devices.
Soldering Considerations
Convection heating is recommended for reflow soldering;
direct-infrared heating is not recommended. The plastic
ODFN package does not require a custom reflow
soldering profile, and is qualified to +260°C. A standard
reflow soldering profile with a +260°C maximum is
recommended.
(http://www.intersil.com/data/tb/TB477.pdf)
Suggested PCB Footprint
It is important that users check the “Surface Mount
Assembly Guidelines for Optical Dual FlatPack No Lead
(ODFN) Package” before starting ODFN product board
mounting.
(http://www.intersil.com/data/tb/TB477.pdf)
Layout Considerations
The ISL29030A is relatively insensitive to layout. Like
other I2C devices, it is intended to provide excellent
performance even in significantly noisy environments.
There are only a few considerations that will ensure best
performance.
Route the supply and I2C traces as far as possible from all
sources of noise. A 0.1µF and 1µF power supply decoupling
capacitors need to be placed close to the device.
VDD
R1
10kΩ
R2 R3
10kΩ 10kΩ
VIR-LED
VI2C_PULL-UP
I2C MASTER
MICROCONTROLLER
INT
SDA
SCL
C1
1µF
C2
0.1µF
V SLAVE_0
1 IALS
3.5kΩ
2 VDD
IRDR 8
7
INT
3 GND
4 REXT
SDA 6
SCL 5
REXT ISL29030A
499kΩ
SLAVE_1
SDA
SCL
I2C SLAVE_n
SDA
SCL
FIGURE 5. ISL29030A TYPICAL CIRCUIT
www.DataSheet4U.com
11
FN7722.0
November 18, 2010
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ISL29030A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| ISL29030 | Low Power Ambient Light and Proximity Sensor | Intersil |
| ISL29030A | Low Power Ambient Light and 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 |