ZMDI ZSSC3123 14-Bit Capacitive Sensor Conditioning IC

ZMDI announced the ZSSC3123 capacitive sensor signal conditioning integrated circuit. The ZMD IC features 14-bit resolution, 0.25% accuracy (over a -20 to +85°C temperature range), built-in sleep mode, and 60uA operating current (over a voltage range of 2.3V to 5.5V). The ZSSC3123 is ideal for low power battery driven sensor applications, sensors for humidity, weight scales, load and compression sensing, and tension control. The chip is in production now. Unit prices start at $3.82 (2.85 EUR) in volumes of 1k devices.

ZMDI ZSSC3123 capacitive sensor signal conditioning integrated circuit

ZMD ZSSC3123 IC Features

  • Can be configured to interface with capacitive sensors from 0.5 to 260 pF
  • 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% FSO@ -40 to 125°C, 3V, 5V, Vsupply ±10%
  • Can connect to microcontrollers or used in stand-alone designs for transducer and switch applications
  • Operating current as low as 60uA over the entire voltage range of 2.3V to 5.5V
  • Built-in sleep mode lowers the current consumption to <1uA for temperatures up to 85°C
  • Sensitivity as low as 125 atto-Farads (aF) per digital bit
  • Supports single- and differential-input sensor configurations
  • All calibration is digital and completed in one pass
  • Accurate to 0.25% over the -20 to +85°C range, and 0.5 % from -40 to +125°C at the standard supply voltage of 2.3 to 5.5 V
  • I2C and SPI interfaces, and PDM or alarm outputs
  • Ideal for MEMS-based sensor elements, such as pressure sensors for hydraulic control systems, humidity sensors, and liquid level gauges

More info: Zentrum Mikroelektronik Dresden AG (ZMDI)