Vishay VCNL36687S proximity sensor with VCSEL in single package

With a range of up to 20 cm (7.9 in.), the VCNL36687S greatly simplifies the use and design-in of the proximity sensing capability in consumer and industrial applications, because no mechanical barriers are required to optically isolate the emitter from the detector. The VCNL36687S features a miniature, surface-mount 3.05 mm by 2 mm leadless package (LLP) with a low profile of 1 mm. The device’s small footprint and low height make it ideal for space-constrained applications, such as smartphones, VR/AR headsets, and other battery-powered, space-constrained applications. 

Key features

• Integrated modules: vertical cavity surface emitting laser, proximity sensor & IC
• Smallest light hole opening design
• Interrupt function
• Communication via I2C interface

Additional features

• Package type: surface-mount (SMT)
• Dimensions (L x W x H in mm): 3.05 x 2 x 1.0
• Integrated modules:
  • Vertical-cavity surface-emitting laser (VCSEL)
  • Proximity sensor (PS)
  • Signal conditioning ASIC
• Interrupt function
• Smallest light hole opening design
• Supply voltage range VDD: 1.65...1.95 V
• Communication: I²C interface
• I²C bus H-level range: 1.65...3.6 V
• Floor life: 168 h, MSL 3, according to J-STD-020
• Material categorization:
  • For definitions of compliance please see www.vishay.com/doc?99912

PROXIMITY FUNCTION

• Immunity to red glow (940 nm VCSEL)
• Programmable IVCSEL sink current
• Intelligent cancellation to reduce cross-talk phenomenon
• Smart persistence scheme to reduce PS response time
• 12-bit PS output data
• Programmable interrupt function for PS with upper and lower thresholds
• Adjustable persistence to prevent false triggers for PS

Applications

• Proximity sensor especially for battery operated devices
• VR/AR headsets to detect
• Mobile devices/touch screen locking

Additional Info

VCNL36687S integrates proximity and a high power VCSEL (vertical-cavity surface-emitting laser) into one small package. It incorporates photodiodes, amplifiers, and analog to digital converting circuits into a single chip by CMOS process. PS programmable interrupt features of individual high and low thresholds offers the best utilization of resource and power saving on the microcontroller. With just a 20 mA pulse current, the VCNL36687S can detect the Kodak Gray Card at a distance of 20 cm, where other sensors need 200 mA. The 12 bits proximity sensing function uses an intelligent cancellation scheme, so that cross talk is eliminated effectively. To accelerate the PS response time, smart persistence prevents the misjudgment of proximity sensing but also allows for a fast response time. Active force mode, one time trigger by one instruction, is a feature offering more power saving. PS functions are easily operated via the simple command format of the I²C (SMBus compatible) interface protocol.

Operating voltage ranges from 1.65 V to 1.95 V. VCNL36687S is packaged in a lead (Pb)-free 8 pin molding package, which offers the best market-proven reliability quality.