S i 11 4 5 / 4 6 / 4 7 - M 0 1
P
ROXIMITY
/ U V / A
MBIENT
L
I G H T
S
ENSOR
M
ODU LE WITH
I
2
C I
NTERFACE
Features
Integrated infrared proximity detector
Proximity detection adjustable from
under 1 cm to over 50 cm
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
50 cm proximity range with single
pulse (<3 klx)
15 cm proximity range with single
pulse (>3 klx)
Operates at up to 128 klx (direct
sunlight)
High reflectance sensitivity
< 1 µW/cm
2
High EMI immunity without shielded
packaging
Integrated UV index sensor
Integrated ambient light sensor
100 mlx resolution possible,
allowing operation under dark glass
1 to 128 klx dynamic range possible
across two ADC range settings
lux measurements with IR
correction algorithm
Industry's lowest power consumption
1.71 to 3.6 V supply voltage
9 µA average current (LED pulsed
25.6 µs every 800 ms at 180 mA
plus 3 µA Si1145/46/47-M01
supply)
< 500 nA standby current
Internal and external wake support
Built-in voltage supply monitor and
power-on reset controller
25.6 µs LED “on” time keeps total
power consumption duty cycle low
without compromising performance
or noise immunity
IR LED integrated inside the module
I
2
C Serial communications
Up to 3.4 Mbps data rate
Slave mode hardware address
decoding (0x60)
Small-outline 10-lead
4.9x2.85x1.2 mm QFN
Temperature Range
–40 to +85 °C
Accurate
Pin Assignments
Si114x-M01
DNC 1
SDA 2
SCL 3
VDD 4
INT 5
10 LEDA
9 LED1
8
GND
7 LED3/CV
DD
6 LED2/CV
DD
Applications
Handsets
Heart rate monitoring
Pulse oximetry
Wearables
E-book readers
Notebooks/Netbooks
Portable consumer electronics
Touchless switches
Touchless sliders
Consumer electronics
Display backlighting control
Description
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, I
2
C 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.
Rev. 1.0 11/14
Copyright © 2014 by Silicon Laboratories
Si1145/46/47-M01
Si1145/46/47-M01
Functional Block Diagram
Si114x-M01
Si114x Proximity/Ambient Light Sensor IC
VDD
Regulator
Temp
A
M
U
X
LED
Drivers
LED1
LEDA
LED1
ADC
Filter
LED3
LED2
LED3
Note2
LED2
Note1
Visible
Infrared
Digital Sequencer & Control Logic
INT
SCL
SDA
I
2
C
Registers
Oscillator
GND
Notes:
1.
Si1146-M01 and Si1147-M01 only. Must be tied to V
DD
with Si1145-M01.
2.
Si1147-M01 only. Must be tied to V
DD
with Si1145-M01 and Si1146-M01.
Figure 1. Si114x-M01 Sensor Module
3.3 V
30 Ohm
5%, 1/16 W
Host
SDA
SCL
SDA
Si1145
SCL
VDD
INT
0.1 uF
INT
Si1145-M01
LED1
LEDA
LED1
LED3
LED2
LED3
LED2
22 µF, 20%, >6 V
GND
Figure 2. Si1145-M01 Module Basic Application Schematic for 1 LED
2
Rev. 1.0
Si1145/46/47-M01
3.3 V
V
BAT
(3.3 to 4.3V)
No
Pop
Host
SDA
SCL
SDA
Si1147
SCL
VDD
INT
0.1 uF
INT
Si1147-M01
LED1
30 Ohm
5%, 1/16 W
LEDA
LED1
LED3
LED2
LED3
LED2
22 µF, 20%, >6 V
GND
Figure 3. Si1147-M01 Module Application Schematic for Long-Range Proximity Detection
Note:
For more application examples, refer to “AN498: Si114x Designer’s Guide”.
V
BAT
(3.3 to 4.3V)
3.3 V
No
Pop
Host
SDA
SCL
SDA
Si1147
SCL
VDD
INT
0.1 uF
INT
Si1147-M01
LED1
5 Ohm
5%, 1/16 W
LEDA
LED1
LED3
LED2
LED3
LED2
47 µF, 20%, >6 V
GND
Figure 4. Si1147-M01 Module Application Schematic with Three LEDs and
Separate LED Power Supply
Rev. 1.0
3
Si1145/46/47-M01
T
ABLE O F
C
ONTENTS
Section
Page
1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.1. Performance Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
1.2. Typical Performance Graphs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
2.2. Proximity Sensing (PS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3. Ambient Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
2.4. Ultraviolet (UV) Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.5. Host Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3. Operational Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.1. Off Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.2. Initialization Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3. Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.4. Forced Conversion Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
3.5. Autonomous Operation Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
4. Programming Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.1. Command and Response Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
4.2. Command Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4.3. Resource Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.4. Signal Path Software Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
4.5. I2C Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
4.6. Parameter RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48
5. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
6. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
7. Package Outline: 10-Pin QFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
8. Suggested PCB Land Pattern . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
9. Top Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67
9.1. Si1145-M01-GMR Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
9.2. Si1146-M01-GMR Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
9.3. Si1147-M01-GMR Top Marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
9.4. Top Marking Explanation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70
4
Rev. 1.0
Si1145/46/47-M01
1. Electrical Specifications
1.1. Performance Tables
Table 1. Recommended Operating Conditions
Parameter
V
DD
Supply Voltage
V
DD
OFF Supply Voltage
V
DD
Supply Ripple Voltage
Operating Temperature
SCL, SDA, Input High Logic
Voltage
SCL, SDA Input Low Logic
Voltage
PS Operation under
Direct Sunlight
IrLED Emission Wavelength
IrLED Supply Voltage
IrLED Supply Ripple Voltage
T
I
2
C
VIH
I
2
C
VIL
Edc
l
VLED
IrLED V
F
= 1.0 V nominal
Applies if IrLEDs use
separate supply rail
0–30 kHz
30 kHz–100 MHz
V
DD
above 1.71 V
Start-up
Symbol
V
DD
V
DD_OFF
OFF mode
V
DD
= 3.3 V
1 kHz–10 MHz
Test Condition
Min
1.71
–0.3
—
–40
V
DD
x0.7
0
—
750
V
DD
—
25
—
—
—
850
—
Typ
—
Max
3.6
1.0
50
85
V
DD
V
DD
x0.3
128
950
4.3
Unit
V
V
mVpp
°C
V
V
klx
nm
V
—
—
25
V
DD
x0.77
—
—
—
—
250
100
—
—
mVpp
mVpp
ms
V
Start-Up Time
LED3 Voltage
Rev. 1.0
5
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