Summary of VISHAY’S NEW VCNL4040 FULLY INTEGRATED PROXIMITY AND AMBIENT LIGHT SENSOR
Vishay's VCNL4040 is a compact, fully integrated sensor combining proximity and ambient light detection. It utilizes Filtron™ technology to mimic human eye response with flicker immunity. The device features a 16-bit ADC, I²C interface, and interrupt capabilities within a tiny 4mm x 2mm package. Ideal for home automation, tablets, and industrial applications, it operates the ALS and PS in parallel while minimizing microprocessor resource usage through programmable thresholds.
Parts used in the VCNL4040 Sensor:
- IR emitter
- Photo detectors for proximity
- Photo detectors for ambient light
- Signal processing IC
- 16-bit ADC
Features Filtron™ technology; three-in-one design combines IR emitter, photo detectors, signal processing IC, 16-bit ADC
Vishay’s new VCNL4040 fully integrated proximity and ambient light sensor is now available from TTI, Inc., a world leading specialist distributor of electronic components. Featuring Filtron™ technology, the VCNL4040 combines an IR emitter, photo detectors for proximity and ambient light, a signal processing IC and a 16-bit ADC. The new device is offered in one of the market’s smallest surface-mount packages, at only 4mm x 2mm x 1.1mm. The three-in-one sensor features an interrupt function and supports an I²C bus communications interface, which significantly simplifies window and sensor placement. Suitable applications for the VCNL4040 include home automation, consumer devices, industrial applications, handheld devices, notebooks and tablets.
Block Diagram
The highly accurate ambient light sensor (ALS) offers 16-bit high resolution with sufficient selections to suit the demands of most applications, whether dark or high transparency lens design. Patented Filtron™ technology achieves ambient light spectrum sensitivity close to real human eye responses, with fluorescent light flicker immunity. The proximity function offers immunity to red glow (940nm IRED) and has an intelligent cancellation scheme that effectively reduces crosstalk and a smart persistence scheme to reduce response time. Both the ALS and proximity sensor (PS) operate in parallel, and can be programmed for high and low interrupt thresholds, so only using minimal amount of microprocessor resource.
Features
- Detection range up to 20cm
- 12-bit or 16-bit proximity sensor resolution
- 16-bit ambient light sensor resolution
- Elimination of cross-talk
- Tiny package of 4.0×2.0×1.1mm height
- I2C protocol (SMBus compatible) interface
- Emitter forward current
- Proximity resolution
- Four selectable lux ranges
- Interrupt with upper and lower thresholds
- Power on, shutdown
Read more: VISHAY’S NEW VCNL4040 FULLY INTEGRATED PROXIMITY AND AMBIENT LIGHT SENSOR
- What technology does the VCNL4040 use for light sensitivity?
The device uses patented Filtron technology which achieves ambient light spectrum sensitivity close to real human eye responses. - Does the VCNL4040 support fluorescent light flicker immunity?
Yes, the Filtron technology provides immunity to fluorescent light flicker. - How large is the surface-mount package of this sensor?
The package measures 4mm x 2mm x 1.1mm. - Can the ambient light sensor and proximity sensor operate simultaneously?
Both sensors operate in parallel and can be programmed independently. - What communication interface does the VCNL4040 support?
The device supports an I²C bus communications interface which is SMBus compatible. - Does the proximity function offer protection against red glow?
Yes, the proximity function offers immunity to red glow at 940nm IRED. - What is the maximum detection range of the proximity sensor?
The detection range is up to 20cm. - How does the device reduce microprocessor resource usage?
It allows programming of high and low interrupt thresholds so only minimal resources are used.
