Description

The SI19013CLU is a low-power, reflectance-based, infrared proximity and ambient light sensor with I2C digital interface and programmable-event interrupt output. It includes an analog-to-digital converter, integrated high-sensitivity visible and infrared photodiodes, digital signal processor, and one, two, or three integrated infrared LED drivers with fifteen selectable drive levels. The SI19013CLU offers excellent performance under a wide dynamic range and a variety of light sources including direct sunlight. It can also work under dark glass covers and provides excellent immunity to artificial light flicker noise and natural light flutter noise. With two or more LEDs, it is capable of supporting multiple-axis proximity motion detection. The SI19013CLU operates from 1.71 to 3.6 V over the –40 to +85 °C temperature range.

Specifications and features

• Integrated infrared proximity detector
• Proximity detection adjustable from under 1 cm up to 200 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/cm2
• High EMI immunity without shielded packaging
• 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
• Accurate lux measurements with IR correction algorithm
• Industrys 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 SI19013CLU supply)
• < 500 nA standby current
• 25.6 µs LED “on” time keeps total power consumption duty cycle low without compromising performance or noise immunity
• Internal and external wake support
• Built-in voltage supply monitor and power-on reset controller
• Serial communications
• Up to 3.4 Mbps data rate
• Slave mode hardware address decoding (0x5A)
• Small-outline 10-lead 2x2 mm QFN
• Temperature Range: –40 to +85 °C

Application Scenarios

The SI19013CLU can be used in various applications such as handsets, heart rate monitoring, pulse oximetry, wearables, audio products, security panels, tamper detection circuits, dispensers, valve controls, smoke detectors, touchless switches, touchless sliders, occupancy sensors, consumer electronics, industrial automation, display backlighting control, and photo-interrupters.

Comparison

• Low-power consumption
• Wide dynamic range
• Works in various light conditions
• Supports multiple-axis proximity motion detection
• High EMI immunity

• Small-outline package may require extra handling care