Brief Description
The ZSSC3123 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: 260pF
• 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 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@ -40 to 125°C, 3V, 5V, Vsupply ±10%

Benefits
• Minimized calibration costs: no laser trimming, 
   one-pass calibration using a digital interface
• Wide capacitance range to support a broad portfolio of
   different sensor elements
• Excellent for low-power battery applications

Physical Characteristics
• Supply voltage: 2.3V to 5.5V
• Typical current consumption 650μA down to 60μA
   depending on configuration
• Typical Sleep Mode current: ≤ 1μA at 85°C
• Operation temperature: –40°C to +125°C
• Die or TSSOP14 package