The ZSSC3122 cLite™ 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. The ZSSC3122 is configurable for capacitive sensors with capacitances up to 10pF and a sensitivity of 125aF/LSB. It is compatible 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, 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 ZSSC3122 and a specific sensor are mated digitally: fast, precise, and without the cost overhead of trimming by external devices or laser.


  • Maximum target input capacitance: 10pF
  • Sampling rates as fast as 0.7ms @ 8-bit, 1.6ms @ 10-bit, 5.0ms @ 12-bit, 18.5ms @ 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% full-scale output @ -20 to 125°C, 3V, 5V, Vsupply ±10% (see data sheet for restrictions)

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Range Carrier Type Package Buy Sample
ZSSC3122AA1BN Obsolete WAFER 0 -20 to 125°C Wafer Package Info
ZSSC3122AA1CN Obsolete WAFER 0 -20 to 125°C Wafer Package Info
ZSSC3122AA2RN Obsolete TSSOP 14 -20 to 125°C Reel Package Info
ZSSC3122AA2TN Obsolete TSSOP 14 -20 to 125°C Tube Package Info
ZSSC3122AA3BN Obsolete WAFER 0 -20 to 125°C Wafer Package Info
ZSSC3122AI1BN Obsolete WAFER 0 -20 to 85°C Wafer Package Info
ZSSC3122AI1CN Obsolete WAFER 0 -20 to 85°C Wafer Package Info
ZSSC3122AI2RN Obsolete TSSOP 14 -20 to 85°C Reel Package Info
ZSSC3122AI2TN Obsolete TSSOP 14 -20 to 85°C Tube Package Info
ZSSC3122AI3BN Obsolete WAFER 0 -20 to 85°C Wafer Package Info

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
ZSSC3122 Short-Form Datasheet Short Form Datasheet PDF 405 KB
ZSSC3122 Datasheet Datasheet PDF 1.60 MB
User Guides & Manuals
IDT CAD Altium Libraries for AID Products Rev 20160819 Guide ZIP 1.20 MB
ZSSC3122/ZSSC3123/ZSC31210 SSC Modular Evaluation Kit Description Manual PDF 777 KB
Application Notes & White Papers
ZSSC3122-23 Application Note - Overvoltage and Reverse Polarity Protection Application Note PDF 209 KB
ZSC3120-ZSSC3122-23 Calibration Sequence and Calibration DLL Application Note PDF 455 KB
IDT Wafer Dicing Guidelines Application Note PDF 144 KB
ZSSC3122 and ZSSC3123 Evaluation Kit Software Rev. Software ZIP 911 KB
Sensing Technologies and Sensor Solutions Overview 简体中文 Overview PDF 1.96 MB
Choosing the Right Sensor Signal Conditioning IC Miscellaneous PDF 300 KB
Sensor Signal Conditioning ICs for Industrial and Consumer Applications 日本語 Overview PDF 2.93 MB

Boards & Kits

Part Number Title Type Company
ZSSC3122-3123KIT Evaluation Kit for ZSSC3122 and ZSSC3123
ZSSC3122-MCS Mass Calibration System for ZSSC3122