DESCRIPTION
These digital charge-transfer (“QT”) QMatrix™ ICs are designed to detect human touch on up 48 keys when used with a scanned, passive X-Y matrix. They will project touch keys through almost any dielectric, e.g. glass, plastic, stone, ceramic, and even wood, up to thicknesses of 5 cm or more. The touch areas are defined as simple 2-part interdigitated electrodes of conductive material, like copper or screened silver or carbon deposited on the rear of a control panel. Key sizes, shapes and placement are almost entirely arbitrary; sizes and shapes of keys can be mixed within a single panel of keys and can vary by a factor of 20:1 in surface area. The sensitivity of each key can be set individually via simple functions over the SPI or UART port, for example via Quantum’s QmBtn program, or from a host microcontroller. Key setups are stored in an onboard eeprom and do not need to be reloaded with each powerup.
These devices are designed specifically for appliances, electronic kiosks, security panels, portable instruments, machine tools, or similar products that are subject to environmental influences or even vandalism. It can permit the construction of 100% sealed, watertight control panels that are immune to humidity, temperature, dirt accumulation, or the physical deterioration of the panel surface from abrasion, chemicals, or abuse. To this end the device contains Quantum-pioneered adaptive auto self-calibration, drift compensation, and digital filtering algorithms that make the sensing function robust and survivable.
The parts can scan matrix touch keys over LCD panels or other displays when used with clear ITO electrodes arranged in a matrix. They do not require 'chip on glass' or other exotic fabrication techniques, thus allowing the OEM to source the matrix from multiple vendors. Materials such as such common PCB materials or flex circuits can be used.
External circuitry consists of a resonator and a few passive parts, all of which can fit into a 6.5 sq cm footprint (1 sq inch). Control and data transfer is via either an SPI or UART port.
These devices make use of an important new variant of charge-transfer sensing, transverse charge-transfer, in a matrix format that minimizes the number of required scan lines. Unlike older methods, it does not require one IC per key.

FEATURES
*Advanced second generation QMatrix™ controller
*Keys individually adjustable for sensitivity, response time, and many other critical parameters
*Panel thicknesses to 50mm through any dielectric
*32 and 48 key versions
*100% autocal for life - no in-field adjustments
*SPI Slave and UART interfaces
*Sleep mode with wake pin
*Adjacent key suppression feature
*Synchronous noise suppression pin
*Spread-spectrum modulation: high noise immunity
*Mix and match key sizes & shapes in one panel
*Low overhead communications protocol
*FMEA compliant design features
*Negligible external component count
*Extremely low cost per key
*44-pin Pb-free TQFP package

APPLICATIONS
*Automotive panels
*Machine tools
*ATM machines
*Touch-screens
*Appliance controls
*Outdoor keypads
*Security keypanels
*Industrial keyboards

QT60486, QT60486-AS-G, QT60326-AS-G, QT60486-AG, QT60326-AG

DESCRIPTION
The QT60320 digital charge-transfer (“QT”) QMatrix™ IC is designed to detect touch on up to 32 keys in a scanned X-Y matrix. It will project the keys through almost any dielectric, like glass, plastic, stone, ceramic, and even most kinds of wood, up to thicknesses of 5 cm or more. The touch areas are defined as simple 2-part interdigitated electrodes of conductive material, like copper, Indium-Tin-Oxide (ITO), or screened silver or carbon deposited on the rear of the control panel. Key sizes, shapes and placement are almost entirely arbitrary; sizes and shapes of keys can be mixed within a single panel of keys and can vary by a factor of 20:1 or more in area. The gain (sensitivity) and threshold of each key can be set individually via simple commands over the UART port, for example via the freeware QmBtn program. Key setups are stored internally in an onboard eeprom and do not need to be reloaded.
The IC is designed specifically to work with appliances, ATM machines, security panels, portable instruments, machine tools, or similar products that are subject to environmental 'challenges' or even physical attack. It permits the construction of 100% sealed, watertight keypanels that are immune to environmental factors such as humidity and condensation, temperature, dirt accumulation, or the physical deterioration of the panel surface from abrasion, chemicals, or abuse. To this end the QT60320 contains Quantum-pioneered self-calibration, drift compensation, and digital filtering algorithms that make the sensing function extremely robust and survivable.
The device can readily control keys over graphical LCD panels or LEDs when used with clear, conductive ITO electrodes. It does not require 'chip on glass' or other exotic fabrication techniques, thus allowing the OEM to source the keymatrix from multiple vendors.
External circuitry consists of an opamp, a common PLD, and a quad fet switch, which can fit into a footprint of roughly 1 square inch (6.5 sq. cm). The device also can control two status LEDs, and includes in addition 8 addressable output drive lines and 4 readable spare input lines which can be used to control LEDs, LCDs, or other panel functions without requiring additional control lines from the host CPU. It also makes available to the user 86 bytes of onboard writeable and readable eeprom via the serial interface, thus helping to reduce system cost by eliminating extra components.
QT60320 technology makes use of an important new variant of charge-transfer sensing, transverse charge-transfer, in an XY format that minimizes the number of required scan lines. Unlike older technologies it does not require one IC per key, and is cost competitive even with some membrane technologies. In many cases it can also replace resistive XY sense elements commonly used in touch screens, at a fraction of the price.
This part is not recommended for new designs. Consult Quantum for advice on alternatives.

FEATURES
*Creates 32 ‘touch buttons’ through any dielectric
*100% autocal for life - no adjustments required
*'N' key rollover: senses all 32 keys in parallel
*Keys individually adjustable for sensitivity
*Mix 'n match key sizes & shapes in one panel
*Tolerates a 20:1 variance in key sizes on a panel
*Panel thicknesses to 5 cm or more
*Back lit keys possible with ITO electrodes
*LED status function drives
*User-addressable multifunction drive pins
*User-addressable internal eeprom
*Simple, universal serial interface
*5V single supply operation
*44-pin TQFP package
*One square inch (6.5 square cm) of PCB required

APPLICATIONS
*Automotive panels
*Machine tools
*ATM machines
*Touch-screens
*Appliance controls
*Outdoor keypads
*Security keypanels
*Industrial keyboards

QT60320C-AS, QT60320C-A

DESCRIPTION
The QT114 QuickLevel™ charge-transfer (“QT”) sensor IC is specifically designed to detect point level in fluids and powders. It will project a sense field through almost any dielectric, like glass, plastic, or ceramic, to sense level on the inside of a vessel, from its exterior. It has the unique capability of independently sensing two trip points when used with structured electrodes having two tiers.
The QT114 does not have sensing timeouts, drift compensation, or other functions which would interfere with level sensing. Its threshold levels are fixed, and the amount of signal required to exceed a threshold is dependent on circuit gain and electrode size and loading, all of which are under the control of the designer.
The QT114 requires only a single inexpensive capacitor in order to function. One or two LEDs can also be added to provide a visual sensing indication.
Power consumption is under 20mA in most applications, allowing operation from Lithium cells for many years. In most cases the power supply needs only minimal regulation.
The QT114 employs numerous signal acquisition and processing techniques pioneered by Quantum. No external switches, opamps, or other analog components aside from CS are required.
A unique feature is the ’slosh filter’, a detection integrator which averages detections over a rolling 15 second interval before activating or deactivating the OUT pins. This filter allows use of the QT114 with violently moving fluids, for example in a moving vehicle, that would otherwise cause the outputs to flicker between two states.
The device also includes selectable output polarity, allowing both output lines to be made either active-high or active-low. It also includes the Quantum-pioneered HeartBeat™ signal, allowing a host controller to monitor the health of the QT114 continuously if desired. By using the charge transfer principle, the IC delivers a level of performance clearly superior to older technologies. It is specifically designed to replace electromechanical devices like float switches, thermistors, and conductance probes.

FEATURES
*Limit sensing of almost any fluid or powder
*2-Tier level sensor - Hi / Low limits with one probe
*Only one external part required - a 5¢ capacitor
*Uses internal probes or external electrodes
*Active high or active low outputs
*Slosh filter averages response of moving fluids
*LED drive capable on both outputs
*2.5 to 5V 20µA single supply operation
*HeartBeat™ health indicator on both outputs

APPLICATIONS
*Consumer appliances
*Medical fluid sensing
*Soil moisture sensing
*Process controls
*Vending machines
*Automotive fluids

QT114-IS, QT114-S, QT114-D

DESCRIPTION
The QT60040 digital charge-transfer (“QT”) QMatrix™ IC is designed to detect touch on up to 4 keys in a scanned 4x1 matrix.
It will project the keys through almost any dielectric, like glass, plastic, stone, ceramic, and even most kinds of wood, up to thicknesses of 6mm. The touch areas are defined as simple 2-part interdigitated electrodes of conductive material, like copper, Indium-Tin-Oxide (ITO), or screened silver or carbon deposited on the rear of a control panel. Alternatively the keys can be implemented on a stick-on flex circuit that can be adhered to the rear of most panels.
The IC is designed specifically for domestic appliances, computer and peripheral control buttons, ATM machines, security panels, portable instruments, machine tools, or similar products that are subject to environmental challenges or physical attack. It permits the construction of 100% sealed, watertight keypanels that are immune to environmental factors such as humidity and condensation, temperature, dirt accumulation, or the physical deterioration of the panel surface from abrasion, chemicals, or abuse. The QT60040 contains Quantum-pioneered self-calibration, drift compensation, and digital filtering algorithms that make its sensing function extremely robust and survivable.
The device can easily control keys over graphical LCD panels or LEDs when used with clear, conductive ITO electrodes.
does not require 'chip on glass' or other exotic fabrication techniques, thus allowing the OEM to source the keymatrix from multiple vendors.
External circuitry consists only of a single, inexpensive capacitor. The sensitivity of the keys can be set by simply changing the value of this capacitor. The device has 4 outputs which indicate detection on the keys; up to 2 keys can be sensed at any one time.
The QT60040 features automatic recalibration timeouts which will cause the device to recalibrate keys on an individual basis when they are 'stuck on' for intervals of either 10s or 60s, depending on a jumper option.
QT60040 technology makes use of an important new variant of charge-transfer sensing, transverse charge-transfer, in an XY format that minimizes the number of required scan lines and external components. Unlike older technologies it does not require one IC per key, and is cost competitive even with some rubber membrane technologies. A distinct advantage is an accelerated time to market due to the fact that custom molded membranes are not required; the entire system can be designed using common PCB materials.

FEATURES
*Creates 4 ‘touch buttons’ through any dielectric
*Only 1 inexpensive capacitor required
*Simple 4x1 matrix key geometry
*100% drift compensation for lifetime reliability
*'2' key rollover: senses any 2 keys at same time
*Back-lit keys possible with ITO electrodes
*Simple direct 'per key' active-high drive outputs
*Auto recalibration after 10 or 60 seconds of touch
*2.5 - 5.5V single power supply operation
*CMOS design - very low power consumption
*14-pin SOIC package
*E604 Evaluation reference design board available

APPLICATIONS
*Automotive controls
*PC / peripheral controls
*ATM machines
*Touch-screens
*Appliance controls
*Vandal-proof keypads
*Security keypanels
*Industrial keyboards

QT60040-IS, QT60040-D

DESCRIPTION
 These digital charge-transfer (“QT”) QMatrix™ ICs are designed to detect human touch on up to 16 or 24 keys when used with a scanned, passive X-Y matrix.
They will project touch keys through almost any dielectric, e.g. glass, plastic, stone, ceramic, and even wood, up to thicknesses of 5 cm or more.
The touch areas are defined as simple 2-part interdigitated electrodes of conductive material,
like copper or screened silver or carbon deposited on the rear of a control panel.
Key sizes, shapes and placement are almost entirely arbitrary; sizes and shapes of keys can be mixed within a single panel of keys and can vary by a factor of 20:1 in surface area.
The sensitivity of each key can be set individually via simple functions over the serial port by a host microcontroller.
Key setups are stored in an onboard eeprom and do not need to be reloaded with each powerup.
These devices are designed specifically for appliances, electronic kiosks, security panels, portable instruments, machine tools, or similar products that are subject to environmental influences or even vandalism.
They permit the construction of 100% sealed, watertight control panels that are immune to humidity, temperature, dirt accumulation, or the physical deterioration of the panel surface from abrasion, chemicals, or abuse.
To this end they contain Quantum-pioneered adaptive auto self-calibration, drift compensation, and digital filtering algorithms that make the sensing function robust and survivable.
These devices feature continuous FMEA self-test and reporting diagnostics, to allow their use in critical consumer appliance applications, for example ovens and cooktops.
Common PCB materials or flex circuits can be used as the circuit substrate; the overlying panel can be made of any non-conducting material.
External circuitry consists of only a few passive parts.
Control and data transfer is via an SPI port.
These devices makes use of an important new variant of charge-transfer sensing, transverse charge-transfer, in a matrix format that minimizes the number of required scan lines.
Unlike older methods, it does not require one IC per key.

FEATURE
* Second generation charge-transfer QMatrix technology
* Keys individually adjustable for sensitivity, response time, and many other critical parameters
* Panel thicknesses to 50mm through any dielectric
* 16 and 24 touch key versions
* 100% autocal for life - no adjustments required
* SPI slave interface
* Adjacent key suppression feature
* Synchronous noise suppression feature
* Spread-spectrum modulation - high noise immunity
* Mix and match key sizes & shapes in one panel
* Low overhead communications protocol C FMEA compliant design features
* Negligible external component count
* Extremely low cost per key
* +3 to +5V single supply operation
* 32-pin lead-free TQFP package

APPLICATIONS
* Automotive panels
* Machine tools
* ATM machines
* Touch-screens
* Appliance controls
* Outdoor keypads
* Security keypanels
* Industrial keyboards

QT60248