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SI1142-A10-GM

更新时间： 2024-11-25 09:26:15
品牌 Logo 应用领域
芯科 - SILICON 传感器
页数 文件大小 规格书
66页 492K
描述
PROXIMITY/AMBIENT LIGHT SENSOR IC WITH I2C INTERFACE

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Si1141/42/43  
2
PROXIMITY/AMBIENT LIGHT SENSOR IC WITH I C INTERFACE  
Features  
Pin Assignments  
QuickSense™ integrated infrared  
proximity detector  
Accurate lux measurements  
possible with IR correction  
algorithm  
DNC  
10  
Proximity detection adjustable from  
under 1 cm to over 1 m  
25.6 µs measurement cycle keeps  
total power consumption duty cycle  
low without compromising  
performance or noise immunity  
Industry's lowest power consumption  
1.8 to 3.6 V supply voltage  
9 µA average current (LED pulsed  
25.6 µs every 800 ms at 180 mA  
plus 3 µA Si114x supply)  
< 500 nA standby current  
Internal and external wake support  
Built-in voltage supply monitor and  
power-on reset controller  
Three independent LED drivers  
15 current settings from 5.6 mA to  
360 mA for each LED driver  
25.6 µs LED driver pulse width  
500 mm proximity range with single  
pulse (<2.5 klx)  
150 mm proximity range with single  
pulse (>2.5 klx)  
Operates at up to 128 klx (direct  
sunlight)  
1
2
3
4
9
8
7
6
SDA  
SCL  
LED1  
GND  
QFN-10  
LED3  
LED2  
VDD  
INT  
5
NC  
Minimum reflectance sensitivity  
2
< 1 µW/cm  
High EMI immunity without shielded  
packaging  
Serial communications  
Up to 3.4 Mbps data rate  
Slave mode hardware address  
decoding  
Small-outline 10-lead 2x2 mm QFN  
Temperature Range  
QuickSense™ integrated ambient  
light sensor  
10 mlx resolution possible, allowing  
operation under dark glass  
1 to 128 klx dynamic range possible  
across two ADC range settings  
17-bit resolution  
–40 to +85 °C  
Applications  
Handsets  
E-book readers  
Notebooks/Netbooks  
Portable consumer electronics  
Audio products  
Security panels  
Tamper detection circuits  
Dispensers  
Valve controls  
Smoke detectors  
Touchless switches  
Touchless sliders  
Occupancy sensors  
Consumer electronics  
Industrial automation  
Display backlighting control  
Photo-interrupters  
Description  
The Si1141/42/43 is a low-power, reflectance-based, infrared proximity and ambient  
2
light sensor with I C digital interface and programmable-event interrupt output. This  
touchless sensor IC includes an analog-to-digital converter, integrated high-  
sensitivity visible and infrared photodiodes, digital signal processor, and one, two, or  
three integrated infrared LED drivers with fifteen selectable drive levels. The Si1141/  
42/43 offers excellent performance under a wide dynamic range and a variety of light  
sources including direct sunlight. The Si1141/42/43 can also work under dark glass  
covers. The photodiode response and associated digital conversion circuitry provide  
excellent immunity to artificial light flicker noise and natural light flutter noise. With  
two or more LEDs, the Si1142/43 is capable of supporting multiple-axis proximity  
motion detection. The Si1141/42/43 devices are provided in a 10-lead 2x2 mm QFN  
package and are capable of operation from 1.8 to 3.6 V over the –40 to +85 °C  
temperature range.  
Preliminary Rev. 0.5 1/11  
Copyright © 2011 by Silicon Laboratories  
Si1141/42/43  
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.  
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