ZHCSCQ6C August 2014 – October 2024 FDC1004
PRODUCTION DATA
The FDC1004 full-scale input range is ±15pF. The part can accept a higher capacitance on the input and the common-mode or offset (constant component) capacitance can be balanced by the programmable on-chip CAPDACs. The CAPDAC can be viewed as a negative capacitance connected internally to the CINn pin. The relation between the input capacitance and output data can be expressed as DATA = (CINn – CAPDAC), n = 1...4. The CAPDACs have a 5-bit resolution, monotonic transfer function, are well matched to each other, and have a defined temperature coefficient.