Quantum Research Group, the charge-transfer (QT) capacitive touch company, has developed a 10-key touch sensor chip that it claims will enable reliable and rugged touch control panels to be produced at lower cost than using mechanical switches.
The QT1100A-ISG is the latest in the QTouch series of charge-transfer sensing devices comprising digital controllers capable of detecting near proximity or touch. Each key is operated through a channel that projects an independent sense field through over 10 mm thickness of glass or plastic. The channels can be individually tuned for sensitivity via its serial interface. They can also be user-configured to suit the application. Cost is minimised because only a few low-cost passive components are needed for each channel. A control panel using the technology can be easily sealed, making it very rugged. The company says it is more reliable in operation than those using traditional capacitive sensors due to a number of patented features within the integrated circuit design. Reliable operation is ensured through automatic calibration for life, adjacent key suppression (AKS) and burst-mode spread-spectrum modulation.
The QT1100A-ISG recalibrates each channel automatically every time it is powered up, compensating for gradual environmental changes and product ageing. AKS compares the signal received from each channel to ensure that only the dominant touch registers as a key touch, thereby eliminating false multiple key presses, especially on tightly-packed key panels such as those found on small mobile devices. Spread-spectrum modulation provides effective noise rejection to eliminate false triggering while also reducing RF emissions. An external synchronisation pin can be used to suppress mains-frequency noise.
The device has SPI and UART serial interfaces along with a scanport output that simulates a membrane keyboard. It self-detects faults for FMEA compliance, making it suited to applications in domestic appliances, television controls, instrument panels, pointing devices and gaming machines.
The QT1100A-ISG operates from a single 3,3 V to 5,0 V supply and is housed in a 48-pin SSOP, lead-free package. An evaluation board is also available.
1 GHz crossover MCU with Arm Cortex Cores Future Electronics
DSP, Micros & Memory
i.MX RT1170 Crossover MCUs, from NXP Semiconductor, are dual-core devices featuring an Arm Cortex-M7 and Arm Cortex-M4 for real-time microcontroller (MCU) performance and high integration for automotive, industrial and IoT applications.
Read more...NECTO studio update 7.5.0
DSP, Micros & Memory
MIKROE have continued their collaboration with Renesas by introducing support for the RL78 architecture in NECTO Studio, expanding the IDE beyond its existing MCU platforms.
Read more...Introducing Aurata CST Electronics
Telecoms, Datacoms, Wireless, IoT
Antenova has launched Aurata SR4L112: a compact, high efficiency embedded 4G/LTE antenna engineered for long, narrow PCB designs.
Read more...UFS 5.0 flash for on-device AI EBV Electrolink
DSP, Micros & Memory
UFS 5.0 embedded flash memory solutions, designed to deliver the performance, efficiency and capacity required for the next generation of AI-enabled mobile and edge devices.
Read more...Accelerate development of physical AI deployments Altron Arrow
DSP, Micros & Memory
With Avocado OS now available on the HummingBoard RZ-V2N-
AIoT and SolidSense AIoT V2N from SolidRun, teams can move from prototype to deployed fleet in weeks.
Read more...AI-ready edge MPU for HMIs Future Electronics
DSP, Micros & Memory
The Renesas RZ/G3E MPU is a high-performance microprocessor designed to enable advanced HMI systems with integrated artificial intelligence capabilities at the edge.
Read more...Industrial-grade ESP32-S3 controller
DSP, Micros & Memory
Erqos Technologies has introduced the EQSP32CE, a CE-certified, industrial-grade ESP32-S3 controller designed for developers who want the flexibility of the ESP32 ecosystem in hardware that can be deployed directly into real-world automation.
Read more...Universal NFC device Altron Arrow
DSP, Micros & Memory
Delivering high-end performance in a compact 4 x 4 mm package, the multipurpose NFC reader from ST Microelectronics, enables the convenience of contactless interaction and features for various end applications.
Read more...Compact low-power 32-bit platform EBV Electrolink
DSP, Micros & Memory
Microchip’s PIC32CM PL10 microcontroller family expands the company’s Arm Cortex-M0+ portfolio, delivering a compact, low-power 32-bit platform designed for cost-sensitive embedded applications.
While every effort has been made to ensure the accuracy of the information contained herein, the publisher and its agents cannot be held responsible for any errors contained, or any loss incurred as a result. Articles published do not necessarily reflect the views of the publishers. The editor reserves the right to alter or cut copy. Articles submitted are deemed to have been cleared for publication. Advertisements and company contact details are published as provided by the advertiser. Technews Publishing (Pty) Ltd cannot be held responsible for the accuracy or veracity of supplied material.
printer friendly version