Renesas Electronics ZSSC3230
The ZSSC3230 is a CMOS integrated circuit for accurate capacitance-to-digital conversion and sensor-specific correction of capacitive sensor signals. The interface is used for the PCcontrolled calibration procedure, which programs the set of calibration coefficients in memory. The ZSSC3230 is configurable for capacitive sensors with capacitances up to 30pF and will provide an output resolution that is scalable up to 18-bit.DESCRIPTION
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. Programming the ZSSC3230 is simple via the serial interface. It is compatible with single-ended capacitive sensors. Measured and corrected sensor values can be output as I2C (≤ 3.4MHz). The ZSSC3230 provides accelerated signal processing, increased resolution, and improved noise immunity in order to support highspeed control, safety, and real-time sensing applications with the highest requirements for energy efficiency. Basic Application Diagram VDD VSS VDD VSS C0 CC C1 EOC SCL SDA ZSSC3230 SCL SDAFEATURES
● Low current consumption: 1.3µA at 1 sample per second● Maximum target input capacitance: 30pF
● Programmable capacitance span and offset
● High sampling rate with 2ms at 14-bit resolution
● ADC resolution: Adjustab...