ZSSC3123 Datasheet | Renesas

ZSSC3123 c Lite TM Capacitive Sensor Signal Conditioner Description The ZSSC3123 is a CMOS integrated circuit for accurate capacitance-to-digital conversion and sensor-specific correction of capacitive sensor signals. Digital pensation of sensor offset, sensitivity, and temperature drift is acplished via an internal digital signal processor running a correction algorithm with calibration coefficients stored in a non-volatile EEPROM. The ZSSC3123 is configurable for capacitive sensors with capacitances up to 260p F and a sensitivity of 125a F/LSB to 1p F/LSB depending on resolution, speed, and range settings. It is patible with both single capacitive sensors (both terminals must be accessible) and differential capacitive sensors. Measured and corrected sensor values can be output as I2C, SPI, pulse density modulation (PDM), or alarms. The I2C interface can be used for a simple PC-controlled calibration procedure to program a set of calibration coefficients into an on-chip EEPROM. The calibrated ZSSC3123 and a specific sensor are mated digitally: fast, precise, and without the cost overhead of trimming by external devices or laser. Available Support - ZSSC3123 SSC Evaluation Kit available: SSC Evaluation Board, samples, software, documentation. - Support for industrial mass calibration available. - Quick circuit customization option for large production volumes. Application: Digital Output, Alarms VSUPPLY (2.3V to 5.5V) 0.1µF 0.1µF VDD Vcore VSS C0 CC c Lite Re ady SDA/MIS O SC L/SC LK SS Alarm_High Alarm_Low Features - Maximum target input capacitance: 260p F - Sampling rates as fast as 0.7ms at 8-bit resolution; 1.6ms at 10-bit; 5.0ms at 12-bit; 18.5ms at 14-bit - Digital pensation of sensor: piece-wise 1st and 2nd order sensor pensation or up to 3rd order single-region sensor pensation - Digital pensation of 1st and 2nd order temperature gain and offset drift - Internal temperature pensation reference (no external...