AD7153

Data Sheet 12-Bit Capacitance-to-Digital Converter AD7152/AD7153 07450-001 FEATURES Capacitance-to-digital converters Interfaces to floating sensors Resolution down to 0.25 fF (that is, up to 12 ENOB) Linearity: 0.05% Common-mode (not changing) capacitance up to 5 pF Four capacitance ranges selectable per operation mode ±0.25 pF to ±2 pF in differential mode 0.5 pF to 4 pF in single-ended mode Tolerant of parasitic capacitance to ground up to 50 pF Conversion time per channel: 5 ms, 20 ms, 50 ms, and 60 ms Internal clock oscillator 2-wire serial interface (I2C-compatible) Power 2.7 V to 3.6 V single-supply operation 100 μA current consumption Operating temperature: −40°C to +85°C 10-lead MSOP APPLICATIONS Automotive, industrial, and medical systems for Pressure measurement Position sensing Level sensing Flowmeters Humidity sensing FUNCTIONAL BLOCK DIAGRAMS VDD CIN1(+) CIN1(–) EXC1 CIN2(+) CIN2(–) EXC2 CAP+ CAP– AD7152 CLOCK VOLTAGE GENERATOR REFERENCE MUX 12-BI...