Capacitive sensor IC - MDC04

Product Specification

Capacitive sensor chips MDC 04 and MDC02 are high integrated digital analog mixed signal sensor integrated circuits. The chip is directly connected with the differential capacitance plate near the object. Using the difference between different dielectric constant and number of substances, the sensor is realized through amplification, digital conversion and compensation calculation of the small changes of material composition. The chip integrates a high-precision 16bit analog ADC circuit with a capacitance resolution of 0.1 fF and a linearity error of less than 0.3%. In addition, the chip has a temperature sensing circuit with an accuracy of 0.5℃, which can be used for temperature compensation and other temperature sensing scenarios.

MDC 04 and MDC02 are four-channel and two-channel measurement of high-precision capacitance conditioning chips, respectively. Each channel measures the mutual and inductive capacitance between the two poles, the programmable fixed measurement range is 0~103.5pF, the programmable variable conditioning range is ±15.5pF, and the chip can automatically search for the optimal range configuration. The chip measurement working mode is flexible, and can be configured with multi-channel measurement combination, single measurement, periodic cycle measurement and other working modes. MDC04 Chip supports digital single bus and I²C dual communication interface, and MDC02 chip supports digital single bus interface. The single-bus interface supports distributed sensing with long cables and multiple nodes.

Compared with similar products at home and abroad, MDC 04 and MDC02 have the advantages of wide measurement range, wide working voltage, low power consumption, a variety of interfaces, built-in, temperature measurement, small size, low cost and other advantages, which can be used for liquid level detection, food / soil and other water content measurement, frost detection, proximity / gesture sensing and other application scenarios.

Features：

Fixed measurement range can be configured: 0~103.5pF

Configurable variable measurement range: ±15.5pF

The chip can automatically search for the optimal range configuration

Capacitance resolution: 0.1 fF

Linear error: <0.3%

Wide power supply voltage range: 2.0V~5.5V

Low power consumption: typical standby current 0.2 µ A, peak current 0.45mA

Measured speed: 3-20ms is configurable

Maximum temperature measurement accuracy: ± 0.5℃ @0℃ ~50℃

Range of operating temperature: -55℃ ~125℃

MDC04 I²C / Single-bus interface

MDC 02, a single-bus interface

Application：

Washing machine liquid level

Smart small home appliances

Printer level

Distance sensing

Water sensing

Food moisture content

Soil water content 

Ice cream detection

Approach / gesture sensing