SI1145-M01 Datasheet, PDF (1/70 Pages) Silicon Laboratories – High reflectance sensitivity

Si1145/46/47-M01
PROXIMITY/UV/AMBIENT LIGHT SENSOR MODULE WITH
I²C INTERFACE
Features
 Integrated infrared proximity detector Accurate lux measurements with IR
Proximity detection adjustable from
correction algorithm
under 1 cm to over 50 cm
 Industry's lowest power consumption
Three independent LED drivers
1.71 to 3.6 V supply voltage
15 current settings from 5.6 mA to 9 µA average current (LED pulsed
360 mA for each LED driver
25.6 µs every 800 ms at 180 mA
25.6 µs LED driver pulse width
plus 3 µA Si1145/46/47-M01
50 cm proximity range with single
supply)
pulse (<3 klx)
< 500 nA standby current
15 cm proximity range with single
Internal and external wake support
pulse (>3 klx)
Built-in voltage supply monitor and
Operates at up to 128 klx (direct
power-on reset controller
sunlight)
25.6 µs LED “on” time keeps total
High reflectance sensitivity
power consumption duty cycle low
< 1 µW/cm²
without compromising performance
High EMI immunity without shielded
or noise immunity
packaging
 IR LED integrated inside the module
 Integrated UV index sensor
 I²C Serial communications
 Integrated ambient light sensor
Up to 3.4 Mbps data rate
100 mlx resolution possible,
Slave mode hardware address
allowing operation under dark glass
decoding (0x60)
1 to 128 klx dynamic range possible  Small-outline 10-lead
across two ADC range settings
4.9x2.85x1.2 mm QFN
 Temperature Range
–40 to +85 °C
Applications
 Handsets
 Heart rate monitoring
 Pulse oximetry
 Wearables
 E-book readers
 Notebooks/Netbooks
Description
 Portable consumer electronics
 Touchless switches
 Touchless sliders
 Consumer electronics
 Display backlighting control
The Si1145/46/47-M01 is a low-power, reflectance-based, proximity, UV Index 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 Si1145/46/47-
M01 offers excellent performance under a wide dynamic range and a variety of light
sources including direct sunlight. The Si1145/46/47-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 Si1145/46/47-M01 is capable of supporting multiple-axis
proximity motion detection. The Si1145/46/47-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
Si114x-M01
DNC 1
SDA 2
SCL 3
VDD 4
INT 5
10 LEDA
9 LED1
8 GND
7 LED3/CVDD
6 LED2/CVDD
Rev. 1.0 11/14
Copyright © 2014 by Silicon Laboratories
Si1145/46/47-M01