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Infineon Sensing Technologies – robust, intelligent, easy-to-use touch sensing solutions
Infineon’s cutting-edge touch sensing technologies have enabled Infineon to be the market leader in capacitive- and inductive-sensing applications. With industry-leading CAPSENSE™ capacitive-sensing and MagSense inductive-sensing, we provides sensing solutions that “just work” and deliver the robustness and intelligence that consumer, industrial, automotive, and Internet of Things (IoT) applications demand.
Inductive sensing
Inductive-sensing supports applications that require metal detection or micrometer measurements of metal deflection. Applications that require detection through high-quality metal overlays, water-proofing, rotary and linear encoder functionality, and proximity sensing can leverage this technology.
CAPSENSE™ – Capacitive sensing
CAPSENSE™ capacitive-sensing supports applications that require touch buttons, sliders, wheels, trackpads, and touchscreens. It delivers features such as proximity sensing, hover and glove touch, liquid tolerance, and advanced sensing techniques like liquid-level sensing. In addition, CAPSENSE™ provides intelligent algorithms that compensate for environmental and manufacturing variations.
| Capacitive-sensing | Inductive-sensing | |
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An Integrated Design Environment (IDE) that enables concurrent hardware and firmware editing, compiling and debugging of PSoC 3, PSoC 4,and PSoC 5 MCUs. Applications are created using schematic capture and over 150 pre-certified, production-ready peripheral Components. More information is available here.
ModusToolbox® is a collection of easy-to-use software and tools enabling rapid development of Infineon MCUs, covering applications from embedded sense and control to wireless and cloud-connected systems using AIROC™ Wi-Fi, AIROC™ Bluetooth® and AIROC™ Wi-Fi and Combo devices.
A powerful software tool that enables development of CapSense® MBR3 solutions. This lightweight Windows® GUI-based tool has been improved to make development of capacitive user-interfaces extremely simple and quick. The tool allows you to setup sensor configuration, apply global system properties, monitor real-time sensor output, and run production-line system diagnostics – all in an intuitive, visually-driven tool, with absolutely no firmware development required!
CAPSENSE™ Capacitive-Sensing Kits
Inductive-Sensing Kits
Expansion Kits
Inductive sensing controllers are the ideal solution for user interfce solutions over metallic surfaces, rotary and linear encoder functionality
Inductive-sensing is a low-cost, robust solution that seamlessly integrates with existing user interfaces, and is also used to detect the presence of metallic or conductive objects.
Inductive-sensing works on the principle of electromagnetic coupling between a sensor coil and the metal target to be detected. When the metal target enters the electromagnetic field induced by a sensor coil, some of the electromagnetic energy is transferred into the metal target.
This transferred energy causes a circulating electrical current called an eddy current. The eddy current flowing in the metal target induces reverse electromagnetic field on the sensor coil, which results in a reduction of the effective inductance of the sensor coil.
The sensor coil is placed in parallel with a capacitor. The parallel combination of sensor inductance and the external capacitor is called a tank circuit. The reduction in the sensor coil inductance causes an upward shift in the resonant frequency of the tank circuit, where this shift in frequency changes the amplitude of the signal across the sensor coil. The change in the amplitude of the sensor coil signal is measured by the PSoC™ MCU to detect the presence of the metal target in the proximity-sensing distance.
Inductive Sensing PSoC™ products
PSoC™ 4700 – Advanced inductive sensing technology for fully waterproof, highly reliable human machine interfaces.
CAPSENSE™ is the world’s best capacitive sensing solution with industry-leading water tolerance and proximity sensing
CAPSENSE™ Controllers subcategories
Capacitive sensing for touch has changed the face of design in consumer and industrial products. Infineon CAPSENSE™ solutions bring elegant, reliable, and easy-to-use capacitive touch sensing functionality to your design, via PSoC™ Creator’s CAPSENSE™ component, ModusToolbox CAPSENSE™ Middleware or our Mechanical Button Replacement (MBR) portfolio. Our capacitive touch sensing solutions have replaced more than four billion mechanical buttons, and it enables hundreds of diverse types of sensing applications.
CAPSENSE™ offers industry leading low power operation, with an average current consumption of 22 μA, and the industry’s widest voltage ranges (1.71-5.5 V). CAPSENSE™ also provides the industry’s best solution for liquid tolerance to prevent false touches in wet/moist environments.
Capacitive Sigma Delta (CSD) sensing algorithm
Infineon CAPSENSE™ technology consists of the Capacitive Sigma Delta (CSD) sensing algorithm, which provides capacitive sensing using a switched capacitor technique with a delta-sigma modulator that converts the sensing current to a digital code. This patented algorithm provides high sensitivity to ensure accurate touch in noisy environments, industry leading proximity distances, and allows for fast scan times.
Auto-tuning algorithms
Infineon has also developed the auto-tuning algorithms, which provide robust noise immunity and adaptation to changing environments, without the need for manual tuning.
Mechanical Button Replacement (MBR) products
CAPSENSE™ Enabled PSoC™ products
PSoC™ 6 Table
| Features/Devices | PSoC™ 61 | PSoC™ 62 | PSoC™ 63 |
| CapSense I/Os | 104 | 104 | 78 |
| CapSense Blocks | 1 | 1 | 1 |
| Liquid Tolerance | Y | Y | Y |
| SmartSense | Y | Y | Y |
| Digital | 9 x SCB 32 x TCPWM |
9 x SCB 32 x TCPWM 12 UDB |
9 x SCB 32 x TCPWM 12 x UDB |
| Analog | 1 x 12-bit SAR ADC 1 x 12-bit VDAC 2 x Opamp 2 x LP comarator |
1 x 12-bit SAR ADC 1 x 12-bit VDAC 2 x Opamp 2 x LP comarator |
1 x 12-bit SAR ADC 1 x 12-bit VDAC 2 x Opamp 2 x LP comarator |
| Comm Int | I2C/SPI/UART | I2C/SPI/UART/FS USB | I2C/SPI/UART/BLE |
PSoC™ 4 Table
| Features/Devices | PSoC™ 4100M | PSoC™ 4200 BLE | PSoC™ 4200L | PSoC™ 4000S |
| CapSense I/Os | 54 | 35 | 97 | 35 |
| CapSense Blocks | 2 | 1 | 2 | 1 |
| Liquid Tolerance | Y | Y | Y | Y |
| SmartSense | Y | Y | Y | Y |
| Digital | 8 x TCPWM 4 x SCB |
4 x TCPWM 2 x SCB 4 x UDB |
8 x TCPWM 4 x SCB 8 x UDB |
5 x TCPWM 2 x SCB |
| Analog | 1 x 12-bit SAR ADC 2 x 8-bit DAC 2 x 7-bit DAC 6 x Comparator 4 x Opamp |
1 x 12-bit SAR ADC 1 x 8-bit DAC 1 x 7-bit DAC 4 x Comparator 4 x Opamp |
1 x 12-bit SAR ADC 2 x 8-bit DAC 2 x 7-bit DAC 6 x Comparator 4 x Opamp |
1 x 10-bit Slope ADC 2 x 7-bit DAC 3 x Comparator |
| Comm Int | I2C/SPI/UART | I2C/SPI/UART/BLE | I2C/SPI/UART | I2C/SPI/UART |
PSoC™ 5 Table
| Features/Device | CY8C56XX | CY8C58XX |
| CapSense I/Os | 62 | |
| CapSense Blocks | 2 | |
| Liquid Tolerance | Y | |
| SmartSense | Y | |
| FS USB | Y | |
| CAN2.0 | Y | Y |
| Digital | 4 x TCPWM 24 x UDB 1 x DFB |
4 x TCPWM1 24 x UDB3 1 x DFB4 |
| Analog | 2 x 12-bit SAR ADC or 1 x 12-bit DelSig ADC and 1 x 12-bit SAR ADC 4 x 8-bit DAC 4 x Comparator 4 x Opamp 4 x SC/ST Analog Block |
2 x 12-bit SAR ADC 1 x 20-bit DelSig ADC 4 x 8-bit DAC 4 x Comparator 4 x Opamp 4 x SC/ST Analog Block5 |
| Comm Int | I2C/UART/SPI/I2S/LIN2.0 | I2C/UART/SPI/I2S/LIN2.0 |
PSoC™ 3 Table
| Features/Device | CY8C366X | CY8C386X |
| CapSense I/Os | 62 | |
| CapSense Blocks | 2 | |
| Liquid Tolerance | Y | |
| SmartSense | Y | |
| FS USB | Y | |
| CAN2.0 | Y | Y |
| Digital | 4 x TCPWM 24 x UDB 1 x DFB |
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| Analog | 1 x 20-bit DelSig ADC 4 x 8-bit DAC 4 x Comparator 4 x SC/ST Analog Block |
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| Comm Int | I2C/UART/SPI/I2S/LIN2.0 | |
PSoC™ 1 Table
| Features/Device | CY8C20XX7/S | CY8C21X34/B | CY8C24X94 | CY8C22X45 | CY8C28XXX |
| CapSense I/Os | 31 | 24 | 44 | 37 | 41 |
| CapSense Blocks | 1 | 1 | 1 | 2 | 2 |
| Liquid Tolerance | Y | Y | Y | Y | Y |
| SmartSense | Y (only S-parts) | Y (only B-parts) | N | Y | Y |
| Digital | 3 x 16-bit timer | 1 x 8- to 32-bit timer/counter 1 x 8- to 32-bit PWM 4 x Digital Block |
1 x 8- to 32-bit timer/counter 1 x 8- to 32-bit PWM 4 x Digital Block |
1 x 8- to 32-bit timer/counter 1 x 8- to 16-bit PWM 6 x Digital Block |
1 x 8- to 32-bit timer/counter 1 x 8- to 16-bit PWM 12 x Digital Block |
| Analog | 2 x LP Comparator 1 x 10-bit incremental ADC |
2 x Comparator 8- and 10-bit ADC 4 x Analog Block |
2 x Comparator 2 x 6- to 9-bit DAC 2 x 6- to 14-bit ADC 2 x Amplifier 6 x Analog Block |
4 x Comparator 1 x 8-bit DAC 1 x 10-bit SAR ADC 8 x Analog Block |
6 x Comparator 4 x 6- to 9-bit DAC 4 x 6- to 14-bit ADC 1 x 10-bit SAR ADC 4 x Amplifier 12 x Analog Block |
| Comm Int | I2C/SPI/UART(TXSW) | I2C/SPI/UART | I2C/SPI/UART/USB | I2C/SPI/UART | I2C/SPI/UART |
How does CAPSENSE™ capacitive sensing work?
CAPSENSE™ capacitive touch sensing technology measures changes in the capacitance between a plate (the sensor) and its environment to detect the presence of a finger on or near a touch surface.
A typical capacitive sensor consists of a copper pad of proper dimensions etched on the surface of a PCB, where a nonconductive overlay serves as the touch surface for the button.
Self-capacitive sensing
In a self-capacitance sensing system, the GPIO pin is connected to a sensor pad by traces and vias. Typically, a ground hatch (GND) surrounds the sensor pad to isolate it from other sensors and traces.
When a finger is present on the overlay, the conductive nature and large mass of the human body forms a grounded, conductive plane parallel to the sensor pad, where a parallel plate capacitor is formed. The capacitance between the sensor pad and the finger is measured with this formula: CF=(Ɛ0ƐA)/d
PSoC™ converts the capacitance into equivalent digital counts called raw counts. Because a finger touch increases the total capacitance of the sensor pin, an increase in the raw counts indicates a finger touch.
Mutual-capacitive sensing
Mutual-capacitance measures the capacitance between two electrodes, the transmit (Tx) and receive (Rx) electrodes. In a mutual-capacitive sensing system, a digital voltage signal switching between a VDDIO or VDDD (if VDDIO is not supported in the device) and GND is applied to the Tx pin and the amount of charge received on the Rx pin is measured. The amount of charge received on the Rx electrodes is directly proportional to the mutual capacitance (CM) between the two electrodes.
When a finger is placed between the Tx and Rx electrodes, the CM decreases. Because of the reduction in CM. the charge received on the Rx electrodes also decreases. The capacitive-sensing system measures the amount of charge received on the Rx electrode to detect a touch/no touch condition.
New standard for performance with TrueTouch™
Today’s touchscreen devices face tough environments. With form factors becoming smaller, displays becoming noisier, and devices being used in harsher conditions, providing high touch performance demands a tougher touchscreen controller. TrueTouch™ touchscreen controllers leverage the industry’s broadest capacitive touch IP portfolio to deliver a new standard for performance to automotive, home appliance and industrial touchscreens.
Expanding possibilities with Gen 6 TrueTouch™ controllers
With the industry’s highest signal-to-noise ratio (SNR), best waterproofing capability, and largest portfolio of proprietary noise immunity solutions, TrueTouch™-powered devices enable a new era of touch interaction and creativity. The Gen 6 family delivers unmatched noise immunity performance and advanced feature support for various touch input modes, making it the first choice touchscreen solution for your Automotive, Home Appliance and Industrial designs.
Best-in-Class performance from the leader in touch
The TrueTouch™ family offers solutions for single touch, two-finger touch, and full multi-touch capability for screen sizes from 1.5 to 12.6-inches diagonal. TrueTouch™ controllers deliver a best-in-class user experience:
Unrivaled touch leadership
Infineon provides the world’s broadest portfolio of touchscreen solutions. Our patents cover categories from panel construction and self- and mutual-capacitance sensing to scanning methods, noise immunity, and finger tracking, spanning every major area of touch sensing innovation. Our continued leadership in the touchscreen space means that we respond to new challenges and market trends with truly innovative solutions.
Transform your automotive infotainment experience with TrueTouch™ controllers
Automotive TrueTouch™ subcategories
Today’s touchscreen devices face tough environments. With displays becoming noisier and devices being used in harsher conditions, providing high touch performance demands a tougher touchscreen controller. Automotive TrueTouch™ touchscreen controllers leverage the industry’s broadest capacitive touch IP portfolio to deliver a new standard for performance to automotive touchscreens.
Best-in-Class performance from the leader in touch
The Automotive TrueTouch™ family offers solutions for single touch, two-finger touch, and full multi-touch capability for screen sizes up to 15-inches diagonal. TrueTouch™ controllers deliver a best-in-class user experience:
Unrivaled touch leadership
Infineon provides the world’s broadest portfolio of touchscreen solutions. Our patents cover categories from panel construction and self- and mutual-capacitance sensing to scanning methods, noise immunity, and finger tracking, spanning every major area of touch sensing innovation. Our continued leadership in the touchscreen space means that we respond to new challenges and market trends with truly innovative solutions.
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