Test & Measurement
On Semiconductor’s New Capacitive Touch Control IC Simplifies Design And Reduces Component Count Of Touch Sensor Applications
ON Semiconductor has introduced a highly integrated capacitance-to-digital converter IC that will speed the implementation and reduce the component count of electrostatic capacitance touch sensor applications. The new high-performance LC717A00AR, which is the first in a series of ON Semiconductor touch sensor integrated circuits, simplifies the replacement of mechanical switches with capacitive touch sensors for applications including automotive instrument panels.Feat
“Because of its high sensitivity, the LC717A00AR is ideal for applications where users may wear gloves or where an air gap or a thick, protective glass cover is needed such as washing machines, refrigerators and cooking appliances,” said Takekiyo Okumura, general manager, of ON Semiconductor’s SANYO division. “In addition to integrated anti-noise circuitry, the device automatically compensates for changes in temperature and humidity to prevent false touch detection and operational failure from environmental changes.
As well as operating as a standalone device, the LC17A00AR allows parameters to be modified using an external microcontroller via a built-in serial interface that can be configured for I2C or SPI operation. The device is compatible with a supply voltage of 2.6 volts (V) to 5.5V and operates with a typical current consumption of 320 micro-amps (µA) at a supply voltage of 2.8 V. Rated operating temperature is -40°C to 105°C.
Package and Price
The LC717A00AR is available in a lead-free VCT28 package and budgetary pricing is $1.50 in quantities of 2,000.