MUX Si115x Data Sheet 2 Proximity/Ambient Light Sensor IC with I C Interface KEY FEATURES The Si115x-AB00/AB09/AB9x is an ambient light sensor, proximity, and gesture detector Proximity detector with I2C digital interface and programmable-event interrupt output. From under 1 cm, to 50 cm without This touchless sensor IC includes dual 23-bit analog-to-digital converters, an integrated additional lensing. high-sensitivity array of visible and infrared photodiodes, a digital signal processor, and From under 1 cm, to 200 cm with up to three integrated LED drivers with programmable drive levels. The Si115x offers ex- additional lensing (e.g., 5 mm hemispherical lens as in our EVB). cellent 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 re- Up to three independent LED drivers. sponse and associated digital conversion circuitry provide excellent immunity to artificial 30 current settings from 5.6 mA to 360 light flicker noise and natural light flutter noise. With two or more LEDs, the Si115x is mA for each LED driver. capable of supporting multiple-axis proximity motion detection. The Si115x is provided in Operates in direct sunlight with optional a 10-lead 2x2 mm DFN package or in a 10-lead 2.9x4.9 mm LGA module with integra- on-die 940 nm passband filter. ted LED, and is capable of operation from 1.62 to 3.6 V over the 40 to +85 C tempera- On die 940 bandpass filter that rejects ture range. unwanted visible light and IR from daylight and other sources (Si115x- AB09/AB9X). VDD Regulator Internal Osc. Ambient light sensor <100 mlx resolution possible, allowing operation under dark glass. ALS Photodiodes Up to 128 klx dynamic range possible LIGHT across two ADC range settings. ADC1 Industrys lowest power consumption LED1 1.62 to 3.6 V supply voltage LED ADC2 9 A average current (LED pulsed 24.4 . LED2 * Drivers s every 800 ms at 180 mA plus 3 A Signal Si115x supply). LED3 ** Processor and <500 nA standby current. (Filter Only in Control 24.4 s LED on time keeps total power AB09 & AB9X consumption duty cycle low without versions) compromising performance or noise community. Internal and external wake support. INT Built-in voltage supply monitor and SCL power-on reset controller. I2C SDA Engine APPLICATIONS I2C addr sel AD Wearables Handsets * Pull up to VDD with 47 kOhm resistor to select primary I2C address (0x53), Display backlighting control or down to GND for alt I2C address 0x52. LED2 driving capabilities only available on Si1152 and Si1153. Consumer electronics ** Pull up to VDD with 47 kOhm resistor. LED3 driving capabilities only available on Si1153. silabs.com Building a more connected world. Rev. 1.3 940 nm Bandpass Filter.Table of Contents 1. Feature List................................4 2. Ordering Guide ..............................5 3. Functional Description............................6 3.1 Ambient Light Sensing ...........................8 3.2 Proximity Sensing.............................8 3.3 Power Consumption ............................10 3.4 Host Interface ..............................11 4. Operational Modes ............................ 13 4.1 Off Mode................................13 4.2 Initialization Mode.............................13 4.3 Standby Mode..............................13 4.4 Forced Conversion Mode ..........................13 4.5 Automated Operation Mode .........................13 5. User to Sensor Communication ....................... 14 2 5.1 Basic I C Operation ............................14 2 5.2 Relationship Between I C Registers and Parameter Table ...............15 2 5.3 I C Command Register Operation .......................17 5.3.1 Accessing the Parameter Table (PARAM QUERY & PARAM SET Commands) ......19 5.3.2 Sensor Operation Initiation Commands ....................19 5.3.3 RESET CMD CTR Command.......................19 5.3.4 RESET Command ...........................19 2 5.4 I C Register Summary ...........................20 5.4.1 PART ID ..............................20 5.4.2 HW ID ...............................21 5.4.3 REV ID...............................21 5.4.4 INFO0 ...............................21 5.4.5 INFO1 ...............................21 5.4.6 HOSTIN0 ..............................22 5.4.7 COMMAND .............................22 5.4.8 IRQENABLE .............................22 5.4.9 RESPONSE1.............................22 5.4.10 RESPONSE0 ............................23 5.4.11 IRQ STATUS ............................24 5.4.12 HOSTOUTx.............................24 6. Measurement: Principle of Operation ..................... 25 6.1 Output Field Utilization ...........................25 6.2 Autonomous and Forced Modes........................27 6.3 Burst Mode ...............................29 silabs.com Building a more connected world. Rev. 1.3 2