Vishay’s New Automotive Grade Proximity Sensors Deliver High Resolution Up to 20 µm for Force Sensing

17 November, 2020

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The Optoelectronics group of Vishay Intertechnology, Inc. today introduced two new fully integrated Automotive Grade proximity sensors with high resolution up to 20 µm for force sensing applications. They each combine a photodiode, amplifier, and ADC circuitry in a 4 mm by 2.36 mm surface-mount package with a low 0.75 mm profile. The VCNL3030X01 features an on-board infrared emitter (IRED) while the VCNL3036X01 is designed to be used with up to three external IREDs, for which an onboard driver with internal logic is provided.

Ideally suited for use in automotive, consumer, smart home, industrial, office, and toy products, the AEC-Q101 qualified devices released today provide higher resolution compared to previous-generation sensors at a lower cost. When used for force sensing applications in steering wheel controls, laptop smart power buttons and multi-force trackpads, and touchpads for IoT devices and kitchen appliances, the VCNL3030X01 and VCNL3036X01 prevent false triggers and even allow users to wear gloves. Designed to work with external IREDs, the VCNL3036X01 provides increased flexibility for product design.

How it works

The devices support the I²C bus communication interface, while their programmable interrupt function allows designers to specify high and low thresholds, which reduces the continuous communication with the microcontroller. Featuring selectable 12-bit and 16-bit outputs, the proximity sensors use intelligent cancellation to eliminate cross-talk, while a smart persistence scheme ensures accurate sensing and faster response time. The VCNL3030X01’s emitter wavelength peaks at 940 nm and has no visible “red-tail.”

Features

Interrupt
- Programmable interrupt function for PS with upper and lower thresholds
- Adjustable persistence to prevent false triggers for PS
Surface-mount 4.0mm x 2.36mm x 0.75mm (L x W x H) package
AEC-Q101 qualified
Infrared emitter (IRED), proximity sensor (PS), and signal conditioning IC Integrated modules
Low power consumption I²C (SMBus compatible) interface
Proximity function
- Immunity to red glow (940nm IRED)
- Programmable IRED sink current
- Intelligent cancellation to reduce cross talk phenomenon
- Smart persistence scheme to reduce PS response time
- Selectable for 12-/16-bit PS output data
I²C bus (PS) Output type
2.5V to 3.6V Operation voltage
168h, MSL 3, according to J-STD-020 floor life

The VCNL3030X01 and VCNL3036X01 feature IRED / LED pulse current of 200 mA, a supply voltage range of 2.5 V to 3.6 V, and an I²C bus voltage range from 1.8 V to 5.5 V. For force sensing applications, the sensors offer the flexibility to fine-tune the current for short displacements. The devices are RoHS-compliant, halogen-free, and Vishay Green.

Samples and production quantities of the new proximity sensors are available now, with lead times of six to 12 weeks for large orders.

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