Firmenblog über Recycle TI Sensing MCU:Capacitive Touch,Signal Monitoring And Measurement,Ultrasonic Sensing

Recycle TI Sensing MCU:Capacitive Touch,Signal Monitoring And Measurement,Ultrasonic Sensing

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I. Capacitive Touch: A reliable and convenient human-machine interaction solution

TI’s CapTIvate™ capacitive touch technology, integrated into TI’s sensing microcontrollers, is an industry-leading, low-power, high-reliability touch solution. It replaces traditional mechanical buttons, sliders and scroll wheels, delivering a cleaner device design and a smoother human-machine interaction experience. The technology’s core lies in detecting capacitance changes caused by human touch to achieve precise touch recognition, whilst offering exceptional environmental adaptability and interference resistance.

In terms of technical features, TI’s capacitive touch sensing MCUs support both self-capacitance and mutual-capacitance detection modes. They can be flexibly configured with up to 64 touch points, covering various touch forms such as buttons, sliders and scroll wheels. They also support proximity sensing, enabling early wake-up before the user makes direct contact with the device, thereby enhancing user convenience. Its built-in spread-spectrum, auto-tuning, noise filtering and debouncing algorithms provide excellent interference immunity, capable of withstanding 10V RMS common-mode noise, 4kV electrical fast transients and 15kV electrostatic discharge. Compliant with the IEC-61000 series of standards, it maintains stable touch response even in harsh environments such as those with humidity, oil or dust.

At the product level, TI has launched a range of dedicated capacitive touch MCUs, represented by the MSP430FR2522. This series of devices utilises a 16-bit RISC architecture, supports clock frequencies of up to 16 MHz, and features ultra-low power consumption—with a touch wake-up current of less than 4 µA for two sensors and a current of just 36 nA in shutdown mode, making it ideal for battery-powered portable devices. Furthermore, the integrated low-power ferroelectric RAM (FRAM) offers high endurance with 10¹⁵ write cycles, enabling rapid data storage with minimal power consumption. To streamline the development process, TI provides the CapTIvate Design Centre GUI tool, allowing engineers to perform real-time debugging of touch parameters and generate code through visual operations without the need for complex coding. Combined with free software libraries and evaluation boards, this significantly reduces development time.

In practical applications, TI’s capacitive touch sensing MCUs are widely used in smart home applications (such as smart switches and home appliance control panels), consumer electronics (such as side buttons on mobile phones and tablets), and industrial control (such as touch operation panels for industrial equipment). They not only meet the demand for a minimalist device design but also enhance the product’s technological appeal and durability.

II. Signal Monitoring and Measurement: The Core of High-Precision, Multi-Scenario Sensing

Signal monitoring and measurement are core requirements in fields such as industrial control, medical equipment and smart metering. By integrating high-precision analogue front-ends (AFEs) and advanced Sigma-Delta analogue-to-digital converters (ADCs), TI’s sensing microcontrollers enable the precise acquisition and analysis of physical quantities such as electrical signals, power and energy. Their measurement accuracy, response speed and power consumption control are all at the forefront of the industry.

For signal monitoring and measurement applications, TI’s sensing MCUs offer 16-bit and 24-bit Sigma-Delta ADC options, featuring exceptional conversion accuracy and noise immunity. These enable the precise capture of subtle signal variations, making them suitable for a wide range of applications including instrumentation, medical devices and test and measurement equipment. Taking the MSP430 series MCUs as an example, their integrated high-performance ADCs support output data rates of up to 8 Msps. Combined with a programmable gain amplifier (PGA), they offer gain adjustment ranging from -6.5 dB to 30.8 dB, enabling flexible adaptation to signal measurement requirements of varying amplitudes. Whether dealing with minute bioelectric signals or power signals in industrial settings, they ensure precise acquisition.

In addition to high-precision ADCs, TI’s sensing MCUs integrate a wealth of digital peripherals and signal processing modules, such as hardware multipliers, DMA controllers and low-power accelerators (LEA), enabling real-time signal processing and data transmission. This eliminates the need for additional signal processing chips, significantly enhancing system integration. Furthermore, their wide supply voltage range (1.8V to 3.6V) and optimised low-power modes enable them to adapt to a variety of power supply environments, including industrial sites and medical devices. This is particularly beneficial in battery-powered portable measurement devices, where it effectively extends the device’s operational life.

In terms of application scenarios, TI’s signal monitoring and measurement sensor MCUs can be used for energy metering in smart electricity and water meters, physiological signal monitoring in medical devices (such as heart rate and blood pressure signal acquisition), and equipment condition monitoring in industrial control (such as current, voltage and temperature signal monitoring). For example, in smart metering applications, their high-precision ADCs enable accurate measurement of electricity and water consumption, complying with international accuracy standards such as ISO 4064 and OIML R49, thereby providing reliable data support for energy management.

III. Ultrasonic Sensing: A Low-Power, High-Precision Non-Contact Measurement Solution

TI’s sensing microcontrollers integrate ultrasonic sensing technology. Through a built-in ultrasonic analogue front-end (USS) and unique waveform capture technology, they enable precise non-contact measurement of physical quantities such as distance and flow rate. Furthermore, they maintain measurement accuracy without compromising power efficiency, making them suitable for a wide range of applications including gas and water flow measurement.

Technically, TI’s ultrasonic sensing MCUs utilise the differential time-of-flight (dTOF) measurement principle, delivering exceptional accuracy—with a differential time-of-flight precision of less than 25 ps and a time measurement resolution of less than 5 ps. They can detect flow rates as low as 1 litre per hour, meeting the demands of high-precision metering. Its integrated ultrasonic analogue front-end can be directly connected to standard ultrasonic sensors (up to 2.5 MHz). It features a built-in programmable pulse generator (PPG) module and a low-impedance output driver, allowing flexible control over the transmission and reception of ultrasonic signals. Combined with a low-power accelerator (LEA), it enables rapid signal processing, significantly enhancing measurement efficiency.

In terms of representative products, the MSP430FR604x and MSP430FR603x series of MCUs are devices designed by TI specifically for ultrasonic sensing applications. These series feature ferroelectric RAM (FRAM), offering up to 256KB of non-volatile storage with high endurance of 10¹⁵ write cycles, as well as fast write speeds for rapid storage of measurement data. Their ultra-low power consumption is particularly noteworthy: at a measurement frequency of once per second, total current consumption is only approximately 3 µA; in standby mode, the real-time clock operating current is as low as 450 nA, and the shutdown current is just 30 nA, making them ideal for long-running metering equipment.

To simplify the development of ultrasonic sensing systems, TI provides comprehensive development tools and software support, including the Ultrasonic Sensing Design Centre GUI, a free software library (containing time-of-flight algorithms) and evaluation boards (such as the EVM430-FR6047). Engineers can use the GUI tool to quickly adjust measurement parameters and complete customised designs without modifying the application code. In practical applications, TI’s ultrasonic sensing MCUs are widely used in smart metering devices such as water meters, heat meters and flow transmitters, as well as in industrial distance measurement and liquid level detection applications. Thanks to their high precision and low power consumption, they are driving the modernisation of the smart metering industry.