Capacitive Sensor 3pF Sensibility, 460–600kHz Output Frequency

This macro-cell is a general purpose capacitive sensor core designed for X-FAB 0.35μm XH035 CMOS technology.

The circuit is intended for touch sensing applications for use in microcontrollers and has two multiplexed inputs. It detects a change in capacitance with a sensibility of 3pF in its inputs and sets the output frequency accordingly (from 460 to 600kHz).

The core is easily retargeted to any other CMOS technology with R-poly devices.