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Touch screen light switch panel - Touch Screen Controllers

Touch screen interfaces are a highly effective medium of operating personal devices (like smartphones, tablets, etc.) or public informational devices (ATMs and ticket vending machines, for example) because of their highly interactive and user-friendly nature. Touch screen switch panels are also gaining popularity and can be seen in the control panel of cars, smart washing machines, and many other appliances. A variety of touch screen light switch is being used today in different types of applications, each having their own advantages and drawbacks. The two main types of touch screens used today are the resistive touch screens and the capacitive touch screens.

The resistive touch screen senses a touch when the pressure applied by the touch leads to contact between the two conductive layers of the screen. A capacitive touch screen, on the other hand, detects a touch when static charge from the screen is transferred to the human skin or stylus. Due to low prices, the resistive touch screens are preferred over other touch screens in areas where image quality can be compromised for low prices.

When a touch screen is touched at a given point on the touch screen, it creates an analog signal that containing some noise, which needs to be filtered and converted into digital signals, which is known as Data Acquisition. Also, when a touch screen is pressed, it leads to vibrations in the conductive layers and inductive and capacitive effects due to the drivers. The reading can be taken only when the voltage has settled. The time elapsed until this happens is called the settling-time. This settling-time also needs to be taken into account while taking the readings. Be

cause of such challenges, sensing and interpreting the touch signals requires a very advanced and sophisticated system which is generally called Touch Screen Controllers. These systems are available in the form of small chips (ICs).

As soon as the screen is touched, a series of processes are triggered inside the touch screen controllers. First of all, a few readings for the X-coordinate of the touched region are taken. After this, several readings are taken for the Y-coordinates as well. Similar happens for Z-values (if the system supports three-dimensional analysis). After this is done, the values of X, Y, and Z readings are averaged to reduce the noise in the signal. Then, the touch screen controller checks if the variation between different readings doesn’t fall outside a particular range or else, the readings are discarded and the whole process is repeated from the beginning.

The whole process involved in determining the position of the touch is carried out by the intelligent touch screen controller and no involvement is required from the CPU but the CPU just receives the final result and then processes it.

Data Acquisition - Touch Screen Controllers

Records 356
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Image Part Number Description Package In Stock Quantity
CG8494AA CG8494AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 48QFN-In Stock: 417 piece(s)
CG8496AAT CG8496AATCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 132 piece(s)
CG8475AAT CG8475AATCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 238 piece(s)
CG8496AA CG8496AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 275 piece(s)
CG8475AA CG8475AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 308 piece(s)
CG8513AAT CG8513AATCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 331 piece(s)
CG8513AA CG8513AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 375 piece(s)
CG8522AAT CG8522AATCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 459 piece(s)
CG8522AA CG8522AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 173 piece(s)
CG8548AAT CG8548AATCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 48QFN-In Stock: 316 piece(s)
CG8548AA CG8548AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 48QFN-In Stock: 465 piece(s)
CG8529AAT CG8529AATCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 155 piece(s)
CG8529AA CG8529AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 315 piece(s)
CG8498AAT CG8498AATCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 143 piece(s)
CG8498AA CG8498AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 239 piece(s)
CG8526AAT CG8526AATCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 453 piece(s)
CG8526AA CG8526AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 491 piece(s)
CG8515AAT CG8515AATCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 48QFN-In Stock: 439 piece(s)
CG8515AA CG8515AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 48QFN-In Stock: 208 piece(s)
CG8549AAT CG8549AATCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 248 piece(s)
CG8549AA CG8549AACypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL PSOC 44QFN-In Stock: 345 piece(s)
ATMXT640T-CCU050 ATMXT640T-CCU050Microchip TechnologyData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL 84UFBGA84-BGAIn Stock: 253 piece(s)
CY8CTMA616LTI-12T CY8CTMA616LTI-12TCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC TRUETOUCH CAPSENSE QFN-In Stock: 285 piece(s)
CY8CTMA616LTI-12 CY8CTMA616LTI-12Cypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC TRUETOUCH CAPSENSE QFN-In Stock: 102043 piece(s)
CY8CTMA616LTI-13 CY8CTMA616LTI-13Cypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC TRUETOUCH CAPSENSE QFN-In Stock: 3021 piece(s)
hotCY8CTMA884LTI-13T CY8CTMA884LTI-13TCypress Semiconductor CorpData Acquisition - Touch Screen Controllers, IC TRUETOUCH CAPSENSE QFN-In Stock: 2188 piece(s)
hotBU21024FV-ME2 BU21024FV-ME2Rohm SemiconductorData Acquisition - Touch Screen Controllers, IC SCREEN CNTRL 8BIT 28SSOPB28-LSSOP (0.220", 5.60mm Width)In Stock: 4000 piece(s)
BU21029MUV-E2 BU21029MUV-E2Rohm SemiconductorData Acquisition - Touch Screen Controllers, IC SCREEN CON 12BIT VQFN020V404020-VFQFN Exposed PadIn Stock: 409 piece(s)
BU21026MUV-E2 BU21026MUV-E2Rohm SemiconductorData Acquisition - Touch Screen Controllers, IC SCREEN CON 12BIT VQFN020V404020-VFQFN Exposed PadIn Stock: 199 piece(s)
MAX11803EWC+ MAX11803EWC+Maxim IntegratedData Acquisition - Touch Screen Controllers, IC INTEGRATED CIRCUIT-In Stock: 487 piece(s)