Capacitive sensor signal conditioner ICs for energy-efficient solutions

IDT ZSSC3230 Capacitive Sensor Signal Conditioner ICs is a CMOS integrated circuit for accurate capacitance-to-digital conversion and sensor-specific correction of capacitive sensor signals. The devices are now available from Mouser. Digital compensation of sensor offset, sensitivity, and temperature drift is achieved through an internal digital signal processor operating a correction algorithm with calibration coefficients saved in a non-volatile, multiple-time programmable memory.

The ICs provide simple programming via the serial interface. The interface is employed for the PC-controlled calibration procedure, which programs the set of calibration coefficients in memory. The device is configurable for capacitive sensors providing capacitances up to 30pF and will offer an output resolution that is scalable up to 18-bit. The device is compatible with single-ended capacitive sensors. Sensor values that are measured and corrected can be output as I2C (≤3.4MHz).

The device offers accelerated signal processing, increased resolution, and improved noise immunity. These features assist highspeed control, safety, and real-time sensing applications with the highest demands for energy efficiency.

Typical applications include humidity sensors, pressure sensors, level sensors; smart, digital, capacitive sensors for energy-efficient solutions; consumer/white goods; and medical applications.