Anti-noise and high sensitivity for automotive and industrial environments
With the adoption of touch technology in various different types of electronic hardware, the popularization of the electronic product market with its popularity is continually increasing, and the convenient and intuitive operation mode provides a strong attraction for its marketing. The fast market is the consumer electronics industry, but the applications in other areas are also on the rise, including in the automotive and industrial applications.
It is estimated that by 2022, the overall capacitance sensor market will reach 31.79 billion US dollars, then there will be 21.14 billion units shipped each year (according to the analysis of Markets & Markets Inc.) Although the automotive touch and industrial applications market is only this An integral part of the overall figure has been identified as one of the major drivers of this growth, including touch switches, touch pads and touch screens.
In fact, professional touch solutions are used in automotive or industrial applications and are quite different from those used in portable electronics (such as smartphones) or home appliances because one of the major differences to be addressed is the presence of electromagnetic interference Interference is essentially unavoidable in automotive or industrial equipment from sources such as motors, cable harnesses, alternator coils and other power-assisted units and equipment used in installations, etc. To maintain high and reliable touch performance , Reducing the impact of this noise is critical and will benefit the user experience.In addition, higher ruggedness is required to ensure that the touch sensor continues to be reliable in harsh applications (susceptible to anticipated shocks, vibration and heat) Sex.
ON Semiconductor, the world leader in energy-efficient innovation, recently introduced a new touch / proximity sensing solution, the LC717A30UJ high dynamic range capacitance-to-digital converter, bringing industry-leading performance, price / performance and convenience to a single Chip, a highly integrated capacitor-to-digital converter chip based on the development of enhanced capacitive touch sensor performance. The LC717A30UJ can suppress electromagnetic interference (EMI) due to the integration of new and innovative capacitive noise suppression EMI) and has improved sensitivity over competitive solutions, so it can detect capacitance changes from low to femtofarad fFs with a sensitivity range of up to 150 millimeters, exceeding the range of any competing device on the market, thus Its higher sensitivity supports gestures and offers traditional touch functionality, increasing the user's control options for a wide variety of applications.
With eight capacitive sense input channels, the LC717A30UJ is ideally suited for systems that require a series of switches including an integrated multiplexer for input channel selection, analog-to-digital converters, capacitance changes, and analog output amplitude , Dual-stage amplifier, system clock, power-on reset circuit and all control logic required to create a holistic solution for selecting I2C and SPI interfaces (ON / OFF) based on system application needs. The LC717A30UJ also has an auto-calibration function that allows Electrode, line capacitance, and ambient optimization and self-calibration of the total capacitance, greatly accelerate the system development cycle, and enhance the ruggedness of field applications. LC717A30UJ performance makes it not only supports traditional touch, also supports gesture recognition, which also means When the chip has an air gap between the sensor / printed circuit board and the shield, or when the user wears the multi-layer glove, the engineer does not need to include the light guide in the assembly and can reduce the overall complexity and thereby reduce the correlation Parts and reduce production costs.In summary, it provides engineers with an easy-to-implement single-chip touch / proximity sensing solution The device is also AEC-Q100 compliant to meet automotive application needs such as vehicle entry systems and dashboard controls.
The LC717A30UJ offers fast response with 16 milliseconds (ms) response time on eight sensing channels and low power standby mode of 0.1 microamps (μA) with a 2.6 V to 5.5 V operating supply voltage. High integration means Minimize the need for external components, thereby further reducing bill of materials.It has a high degree of integration and a wide dynamic range can be widely used in industrial and consumer end products touch or gestures man-machine interface, such as induction cooker, refrigerator, Home entertainment systems, building automation equipment, automotive, industrial equipment and lighting control.
ON Semiconductor can provide LC717A30UJGEVK capacitive touch sensor evaluation board, allowing customers to assess the different operating modes of switching mode, interested product developers can work through the evaluation version to further understand the product, and to speed up product development.