Renesas Electronics ZSSC3230 Capacitive Sensor Signal Conditioner ICs

Renesas Electronics 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. Digital compensation of sensor offset, sensitivity, and temperature drift is accomplished via an internal digital signal processor running a correction algorithm with calibration coefficients stored in a nonvolatile, multiple-time programmable (NVM) memory.

Renesas Electronics ZSSC3230 Capacitive Sensor Signal Conditioner ICs offer simple programming via the serial interface. The interface is used for the PC-controlled calibration procedure, which programs the set of calibration coefficients in memory. The ZSSC3230 is configurable for capacitive sensors offering capacitances up to 30pF and will provide 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 ZSSC3230 provides accelerated signal processing, increased resolution, and improved noise immunity. These features support high-speed control, safety, and real-time sensing applications with the highest requirements for energy efficiency.

Features

1.3µA current consumption at 1 sample per second
30pF maximum target input capacitance
Programmable capacitance span and offset
High sampling rate with 2ms at 14-bit resolution
ADC resolution: Adjustable in speed and resolution, 18-bit maximum
Internal auto-compensated temperature sensor; not stress-sensitive
Oversampling modes using internal averaging
Small die size

Programmable measurement sequence, single-shot, and automatic cycling of measurements with end-of-sequence interrupt output
Interrupt features
Integrated NVM for configuration and free space for customer use
External reset pin (low active)
No external trimming components required
Highly integrated CMOS design