CapSense® Touch Controllers, Cypress SemiconductorA range of Programmable System-on-chip (PSoC®) products from Cypress Semiconductor incorporating analogue sub-systems with capacitive sensing hardware. These configurable devices include an on-board MCU and are aimed primarily at capacitive touch screen applications.Register-configurable CapSense Express controllerNo firmware development requiredPatented CSD sensing algorithmHigh sensitivity (0.1 pF)Overlay thickness of up to 15 mm for glass and 5 mm for plasticProximity solutionsSensitivity up to 2 fF per countBest-in-class >,100:1 SNR performanceSuperior noise-immunity performance against conducted and radiated noiseUltra-low radiated emissionsSmartSense Auto-tuningSets and maintains optimal sensor performance during run timeEliminates manual tuning during development and productionLow-power CapSenseAverage current consumption of 22 μA per sensor at 120-ms refresh intervalWide parasitic capacitance (CP) range: 5–45 pFAdvanced user interface featuresLiquid toleranceUser-configurable LED brightness for visual touch feedbackUp to eight high-sink current GPOs to drive LEDsBuzzer signal output for audible touch feedbackFlanking Sensor Suppression (FSS) to eliminate false touches in closely spaced buttonsAnalog voltage outputAttention line interrupt to the host to indicate any change in sensor statusTouch Screen Controllers