Skip to main content
ZSSC3122 - Application Circuit
ZSSC3122 - Block Diagram
ZSSC3122 - Pinout


Low Voltage Capacitive Sensor Signal Conditioner with Digital Output

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 Specification

FunctionTemp. RangeSupply Voltage (V)Input TypeInterfaceResolution (bits)
Capacitive SSC-40 to 85°C, -40 to 125°C1.80 - 5.50Single-capacitorPDM, Two Alarms, I2C, SPI14

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. RangeCarrier TypeSample & Buy
ZSSC3122AA1BNActiveDICEWAFER0-40 to 125°CWaferCheck Availability
ZSSC3122AA1CNActiveDICEFWAFER0-40 to 125°CWaferCheck Availability
ZSSC3122AA2RNActivePGG14TSSOP14-40 to 125°CReelCheck Availability
ZSSC3122AA2TNActivePGG14TSSOP14-40 to 125°CTubeCheck Availability
ZSSC3122AA3BNActiveDICEWAFER0-40 to 125°CWaferCheck Availability
ZSSC3122AI1BNActiveDICEWAFER0-40 to 85°CWaferCheck Availability
ZSSC3122AI1CNActiveDICEFWAFER0-40 to 85°CWaferCheck Availability
ZSSC3122AI2RNActivePGG14TSSOP14-40 to 85°CReelCheck Availability
ZSSC3122AI2TNActivePGG14TSSOP14-40 to 85°CTubeCheck Availability
ZSSC3122AI3BNActiveDICEWAFER0-40 to 85°CWaferCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
ZSSC3122 Datasheet Datasheet PDF 905 KB Jan 25, 2016
ZSSC3122 Short-form Datasheet Short Form Datasheet PDF 72 KB Jan 25, 2016
User Guides & Manuals
ZSSC3122/ZSSC3123/ZSC31210 SSC Modular Evaluation Kit Description Manual PDF 708 KB Apr 26, 2016
Apps Notes & White Papers
IDT Wafer Dicing Guidelines Application Note PDF 44 KB Apr 17, 2016
ZSC3120-ZSSC3122-23 Calibration Sequence and Calibration DLL Application Note PDF 314 KB Apr 17, 2016
ZSSC3122-23 Application Note - Overvoltage and Reverse Polarity Protection Application Note PDF 92 KB Apr 17, 2016
IDT Sensing Solutions Overview 日本語 Overview PDF 593 KB Nov 2, 2016
IDT CAD Altium Libraries for AID Products Rev 20160819 PCB Design Files ZIP 1.20 MB Aug 19, 2016

Software & Tools

Title Type Format File Size Datesort icon
ZSSC3122 and ZSSC3123 Evaluation Kit Software Rev. Software ZIP 911 KB Apr 7, 2016