ZSSC3122 Datasheet - Integrated Device Technology

Brief Description
The ZSSC3122 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 non-volatile EEPROM.

FEATUREs
• Maximum target input capacitance: 10pF
• Sampling rates as fast as 0.7ms at 8-bit resolution;
   1.6ms at 10-bit; 5.0ms at 12-bit; 18.5ms at14-bit
• Digital compensation of sensor: piece-wise 1st
   and 2nd order sensor compensation or up to
   3rd order single-region sensor compensation
• Digital compensation of 1st and 2nd order
   temperature gain and offset drift
• Internal temperature compensation reference
   (no external components)
• Programmable capacitance span and offset
• Layout customized for die-die bonding with sensor
   for low-cost, high-density chip-on-board assembly
• Accuracy † as high as
   ±0.25% FSO@ -20 to 125°C, 3V, 5V, Vsupply ±10%