CAN404

The CAN404 is a universal multipurpose interface for capacitive sensors and contains the complete signal conditioning unit on chip. The CAN404 detects the relative capacitive change of a measuring capacity to a fixed reference capacity. CAN404 IC is optimized for capacities in the wide range of 10pF to 2nF with possible changes of capacity of 5% to 100% of the reference capacity. The CAN404 offers an output signal proportional to the change of the measuring capacity and can be adjusted by an active lowpass filter. Referring the output signal to an internal reference allows a temperature compensation. In addition to the voltage output, a voltage- to-current interface according to the Namur norm is implemented. With only a few external components, the CAN404 is suitable for a great variety of applications including a zero compensation.