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ZMD 31210
功能简介
  • 样片试用(1~10片):
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  • 小批量采购(10~100片):
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  • 整包装订购或大批量(MPQ):
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订购专线:+86-0755-82127888
详细介绍

The ZMD31210 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 ZMD31210 is adjustable to many capacitive sensors with capacitances ranging from 2pF to 260pF and a sensitivity of 125aF/LSB to 1pF/LSB depending on the resolution, speed, and range settings (using 3-bit reference and 3-bit offset capacitances). 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 ZMD31210 and a specific sensor are mated digitally: fast, precise, and without the cost overhead associated with trimming by external devices or laser.


For quick and easy evaluation of the ZMD31210 and support for calibrating prototypes, ZMD offers the ZMD31210 development kit, which includes the development board, TSSOP14 samples, and software. Order using part number ZMD31210KIT.



  • Target input capacitance range: 2pF to 260pF

  • Programmable sampling rates: 8 to 14bit; as fast as 0.75ms

  • Digital compensation of sensor offset; piece-wise 1st and 2nd order digital compensation of sensor gain

  • 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

  • Supply voltage: 2.7 to 5.5V; optional Vcore pin: 1.8 to 3.6V

  • Current consumption as low as 60µA

  • Sleep mode current <1µA(25°C)

  • Operating temperature -40 to 125°C

  • I²C and SPI for easy interface to microcontroller

  • Two alarms that can act as full push-pull or open-drain switches

  • Die or TSSOP14 package available


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