Proximity/Ambient Light Sensor - Silicon Laboratories
Description
Si115x Data Sheet
Proximity/Ambient Light Sensor IC with I2C Interface
The Si115x-AB00/AB09/AB9x is an ambient light sensor, proximity, and gesture detector 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 up to three integrated LED drivers with programmable drive levels.
The Si115x offers excellent performance under a wide dynamic range and a variety of light sources, including direct sunlight.
The Si115x 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 Si115x is capable of supporting multiple-axis proximity motion detection.
The Si115x is provided in a 10-lead 2x2 mm DFN package or in a 10-lead 2.
9x4.
9 mm LGA module with integrated LED, and is capable of operation from 1.
62 to 3.
6 V over the –40 to +85 °C temperature range.
940 nm Bandpass Filter.
VDD LIGHT
Regulator ALS Photodiodes
.
.
(Filter Only in AB09 & AB9X versions)
MUX
Internal Osc.
ADC1 ADC2
Signal Processor and Control
LED Drivers
LED1 LED2 * LED3 **
INT
SCL
SDA
I2C Engine
AD
I2C addr sel
* Pull up to VDD with 47 kOhm resistor to select primary I2C address (0x53), or down to GND for alt I2C address 0x52.
LED2 driving capabilities only available on Si1152 and Si1153.
** Pull up to VDD with 47 kOhm resistor.
LED3 driving capabilities only available on Si1153.
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 ...
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