SI1141-M01 Datasheet, PDF (1/79 Pages) Silicon Laboratories – High reflectance sensitivity

Si1141/42/43-M01
PROXIMITY/AMBIENT LIGHT SENSOR MODULE WITH I²C INTERFACE
Features
 Integrated infrared proximity detector  Industry's lowest power consumption
Proximity detection adjustable from 1.71 to 3.6 V supply voltage
under 1 cm to over 50 cm
25.6 µs LED “on” time keeps total
Three independent LED drivers
power consumption duty cycle low
15 current settings from 5.6 mA to
without compromising performance
360 mA for each LED driver
or noise immunity
25.6 µs LED driver pulse width
9 µA average current (LED pulsed
50 cm proximity range with single
25.6 µs every 800 ms at 180 mA
pulse (<3 klx)
plus 3 µA Si1141/42/43-M01 supply)
15 cm proximity range with single
< 500 nA standby current
pulse (>3 klx)
Internal and external wake support
Operates at up to 128 klx (direct
Built-in voltage supply monitor and
sunlight)
power-on reset controller
High reflectance sensitivity
 Single IR LED integrated inside the
< 1 µW/cm²
module
High EMI immunity without shielded ^{ Serial communications}
packaging
Up to 3.4 Mbps data rate
 Integrated ambient light sensor
Slave mode hardware address
100 mlx resolution possible, allowing
decoding (0x5A)
operation under dark glass
 Small-outline 10-lead
1 to 128 klx dynamic range possible ^{4.9x2.85x1.2 mm QFN}
across two ADC range settings
 Temperature Range
Accurate lux measurements with IR ^{–40 to +85 °C}
correction algorithm
Applications
 Handsets
 Heart rate monitoring
 Pulse oximetry
 E-book readers
 Notebooks/Netbooks
 Portable consumer electronics
 Audio products
 Security panels
 Tamper detection circuits
Description
 Dispensers
 Valve controls
 Smoke detectors
 Touchless switches
 Touchless sliders
 Occupancy sensors
 Consumer electronics
 Industrial automation
 Display backlighting control
The Si1141/42/43-M01 is a low-power, reflectance-based, infrared proximity and
ambient light module with integrated single IR LED, two additional LED driver outputs,
I²C digital interface, and programmable-event interrupt output. This touchless sensor
module includes an analog-to-digital converter, integrated high-sensitivity visible and
infrared photodiodes, digital signal processor, and three integrated infrared LED
drivers with fifteen selectable drive levels. The Si1141/42/43-M01 offers excellent
performance under a wide dynamic range and a variety of light sources including direct
sunlight. The Si1141/42/43-M01 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 Si1141/42/43-M01 is capable of supporting multiple-axis proximity motion
detection. The Si1141/42/43-M01 devices are provided in a 10-lead 4.9x2.85x1.2 mm
QFN package and are capable of operation from 1.71 to 3.6 V over the –40 to +85 °C
temperature range.
Pin Assignments
Si1141/42/43-M01
DNC 1
SDA 2
SCL 3
VDD 4
INT 5
10 LEDA
9 LED1
8 GND
7 LED3/CVDD
6 LED2/CVDD
Rev. 1.1 12/14
Copyright © 2014 by Silicon Laboratories
Si1141/42/43-M01