ANALOG DEVICES AD7142ACPZ-1500RL7

AD7142 is an integrated capacitance-to-digital converter (CDC) with on-chip environmental calibration for use in systems requiring a novel user input method. It can interface to external capacitance sensors implementing functions such as capacitive buttons, scroll bars, or wheels. The CDC has 14 inputs channelled through a switch matrix to a 16bit, 250KHz sigma-delta (∑-∆) capacitance-to-digital converter. The CDC is capable of sensing changes in the capacitance of the external sensors and uses this information to register a sensor activation. The external sensors can be arranged as a series of buttons, as a scroll bar or wheel, or as a combination of sensor types. By programming the registers, the user has full control over the CDC setup. It is used in applications such as personal music and multimedia players, cell phones, digital still cameras, smart hand-held devices, television, A/V, and remote controls, gaming consoles.