Silicon Labs Si1151 & Si1152 Proximity/Ambient Light Sensors
Silicon Labs Si1151 and Si1152 Proximity/Ambient Light Sensors combine an ambient light sensor, a proximity sensor, and a gesture detector into a compact, single-chip solution. The low-power, long-range Si1151 and Si1152 sensors feature an I2C digital interface and programmable-event interrupt output. These touchless sensor ICs include dual 23-bit analog-to-digital converters, an integrated high-sensitivity array of visible and infrared photodiodes, a digital signal processor, and one (Si1151) or two (Si1152) integrated LED drivers with programmable drive levels.
Features
Proximity detectorFrom under 1cm to 50cm without additional lensing.From under 1cm to 200cm with additional lensing (e.g., 5mm hemispherical lens).Independent LED drivers:Si1151: 1 LED driverSi1152: 2 LED drivers30 current settings from 5.6mA to 360mA for each LED driverOperates in direct sunlight with optional on-die 940nm passband filterOn die 940 bandpass filter that rejects unwanted visible light and IR from daylight and other sources (Si115x-AB09/AB9X)Ambient light sensor<100 mlx resolution possible, allowing operation under dark glassUp to 128klx dynamic range possible across two ADC range settings
Applications
WearablesHandsets
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