ZMD ZSSC3122 cLite Low Voltage Capacitive Sensor Signal Conditioner

ZMD introduced their ZSSC3122 cLite low voltage capacitive sensor signal conditioner (SSC). The ZSSC3122 can be configured to interface with capacitive sensors from 2 to 10 pF with sensitivity as low as 125 atto-Farads (aF) per digital bit. The ZSSC3122 cLite features 4-bit resolution, 0.25% full-scale output accuracy, and built-in sleep mode. The device is ideal for low-power battery applications and industrial and rugged environments. ZMD ZSSC3122 samples are available now. Unit prices start at 3.30 EUR ($4.54 USD) in volumes of 1k devices.

ZMD ZSSC3122 cLite low voltage capacitive sensor signal conditioner (SSC)

ZSSC3122 cLite Features

  • 14-bit capacitive-to-digital conversion and full 14-bit compensation of sensor offset
  • Connects to microcontrollers and can be utilized in stand-alone designs for transducer and switch applications
  • Built-in sleep mode lowers current consumption to <1uA for temperatures up to 85°C
  • 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
  • Calibration coefficients are stored in an on-board non-volatile EEPROM
  • 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)
  • I2C, SPI, PDM or alarm outputs
  • 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%
  • Minimized calibration costs: no laser trimming, one-pass calibration using a digital interface
  • Operating current as low as 60uA over the entire voltage range of 1.8V to 5.5V
  • Sensitivity and temperature via an internal digital signal processor running a correction algorithm
  • Includes TSSOP 14, development board, USB cable and calibration software
  • Ideal for low-power battery applications

More information: Zentrum Mikroelektronik Dresden AG (ZMDI)