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.
MCU for noisy environments EBV Electrolink
DSP, Micros & Memory
The MCX?E24X is a high-performance microcontroller family from NXP, engineered for industrial, automotive-like, and energy-focused environments.
Read more...SmartRAID 4300 Series Altron Arrow
DSP, Micros & Memory
Microchip’s disaggregated architecture leverages host CPU and PCIe infrastructure to overcome traditional storage bottlenecks in scalable, secure NVMe RAID storage solutions.
Read more...High-performance SDR range RFiber Solutions
DSP, Micros & Memory
Epiq Solutions offers high-performance RF tuners and software-defined radios with various specifications for diverse applications in congested environments.
Read more...High performance SDR design considerations RFiber Solutions
Editor's Choice DSP, Micros & Memory
As the spectrum gets increasingly crowded, and adversaries more capable, the task of examining wide bands and making sense of it all, while not missing anything, gets harder.
Read more...Direct RF converters and FPGAs boost EW applications RFiber Solutions
DSP, Micros & Memory
The latest boost to electronic warfare designs comes from emerging FPGA architectures that combine advanced RF converters and high-performance processing engines in a single package.
Read more...1-Wire EEPROM with secure authenticator Altron Arrow
DSP, Micros & Memory
The DS28E54 secure authenticator combines FIPS 202-compliant secure hash algorithm (SHA-3) challenge and response authentication with secured electrically erasable programmable read-only memory.
Read more...MCX C Series development board Avnet Silica
DSP, Micros & Memory
The FRDM-MCXC444 is a compact and scalable development board for rapid prototyping of MCX C444 MCU from NXP Semiconductors.
Read more...Redefining entry-level MCUs NuVision Electronics
DSP, Micros & Memory
The company positions the GD32C231 series as a ‘high-performance entry-level’ solution designed to offer more competitive options for multiple applications.
Read more...Robust PoE module CST Electronics
Power Electronics / Power Management
The Ag59800-LPB high power, IEEE 802.3bt compliant, PD module from Silvertel offers typical efficiency of 95% making it an ideal choice for higher power, space-constrained 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