Touch Sensing IC is designed for portable products.
Press Release Summary:
Able to sense touch and near proximity through any kind of dielectric such as glass, plastic, stone, ceramic, or wood, Model QT100 single-channel sensing chip requires only 2 capacitors and resistor to complete sensor design. Sense electrode can be any conductive surface, and sensitivity can be is adjusted by changing capacitor values. RoHS compliant charge-transfer device operates from single 2-5 V supply and consumes 10 µA at 2 V in low power mode.
Original Press Release:
Smallest Touch-Sensing IC for Mobile Products
Pittsford, NY: QT100 is a new, economical, single-channel sensing chip in an RoHS-compliant, 6- SOT-23 package- ideal for hand-held products.
Designed primarily for use in portable products such as mobile phones and MP3 players, this is the smallest charge-transfer device available. But there is no compromise with respect to the features provided for stable and reliable operation. QT100 can sense touch, as well as "near proximity" through any kind of dielectric including glass, plastic, stone, ceramic or wood. Designers therefore now have a high degree of flexibility in the physical and aesthetic design of their products. Furthermore, touch sensors famously eliminate the reliability and manufacturing complexity issues associated with electromechanical switches and membrane keypads. That's why touch switches have been used in so many consumer products.
QT100 only needs three external passive components (two capacitors and a resistor) to complete the sensor design. The sense electrode can be any conductive surface, from a simple printed circuit board pad or an area of see-through conductive indium tin oxide (ITO) printed onto a transparent touch screen. Sensitivity is easily adjusted through the design of sense electrodes or by changing capacitor values.
QT100 offers unique, patented features such as self-calibration on power-up with automatic drift compensation. A consensus filter, and the use of spread-spectrum signal acquisition, ensure high noise immunity and low RF emissions.
QT100 operates from a single 2 to 5V supply and consumes only 10µA at 2V in low power mode. Where speed and response time are critical, the chip offers a fast mode with just 1 millisecond between bursts. A sync mode is also available, where the device sleeps after each measurement burst, and enables multiple devices to be synchronized, while preventing cross-interference. The operating mode is selected though the status of the sync pin.
Designed in UK by European capacitive-sensing specialists Quantum Research Group, QT100 is available from stock from Saelig Co. (USA distributor for Quantum Research UK) at less than $1.00 (10K).
Direct Link: www.saelig.com/pr/qt100.htm
Contact Information
email: info@saelig.com
phone / fax: 585-385-1750 / 585-385-1768
web: www.saelig.com
