SI1153 Datasheet, PDF (1/58 Pages) Silicon Laboratories – Proximity/Ambient Light Sensor IC with IC Interface

Si1153 Data Sheet
Proximity/Ambient Light Sensor IC with I²C Interface
The Si1153-AA00/AA09/AA9x is an ambient light sensor, proximity, and gesture detec-
tor with I2C digital interface and programmable-event interrupt output.
This touchless sensor IC includes dual 23-bit analog-to-digital converters, an integrated
high-sensitivity array of visible and infrared photodiodes, a digital signal processor, and
three integrated LED drivers with programmable drive levels. The Si1153 offers excel-
lent performance under a wide dynamic range and a variety of light sources, including
direct sunlight. The Si1153 can also work under dark glass covers. The photodiode re-
sponse and associated digital conversion circuitry provide excellent immunity to artificial
light flicker noise and natural light flutter noise. With two or more LEDs, the Si1153 is
capable of supporting multiple-axis proximity motion detection. The Si1153 is provided in
a 10-lead 2x2 mm DFN package or in a 10-lead 2.9x4.9 mm LGA module with integra-
ted LED, and is capable of operation from 1.62 to 3.6 V over the –40 to +85 °C tempera-
ture range.
VDD
LIGHT
Regulator
ALS Photodiodes
.
.
(Filter Only in
AA09 & AA9X
versions)
Internal Osc.
ADC1
ADC2
Signal
Processor
and
Control
LED
Drivers
INT
SCL
SDA
I2C
Engine
AD
I2C addr sel
LED1
LED2 *
LED3 **
* Pull up to VDD with 47 kOhm resistor to select primary I2C address (0x53),
or down to GND for alt I2C address 0x52.
** Pull up to VDD with 47 kOhm resistor
KEY FEATURES
• Proximity detector
• From under 1 cm, to 50 cm without
additional lensing.
• From under 1 cm, to 200 cm with
additional lensing (e.g., 5 mm
hemispherical lens as in our EVB).
• Up to three independent LED drivers.
• 30 current settings from 5.6 mA to 360
mA for each LED driver.
• Operates in direct sunlight with optional
on-die 940 nm passband filter.
• On die 940 bandpass filter that rejects
unwanted visible light and IR from
daylight and other sources (Si1153-
AA09/AA9X).
• Ambient light sensor
• <100 mlx resolution possible, allowing
operation under dark glass.
• Up to 128 klx dynamic range possible
across two ADC range settings.
• Industry’s lowest power consumption
• 1.62 to 3.6 V supply voltage.
• 9 μA average current (LED pulsed 25.6
μs every 800 ms at 180 mA plus 3 μA
Si1153 supply).
• <500 nA standby current.
• 25.6 μs LED “on” time keeps total power
consumption duty cycle low without
compromising performance or noise
community.
• Internal and external wake support.
• Built-in voltage supply monitor and
power-on reset controller.
APPLICATIONS
• Wearables
• Handsets
• Display backlighting control
• Consumer electronics
silabs.com | Smart. Connected. Energy-friendly.
Rev. 0.9