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High-precision digital capacitive sensing chip - MDC02

Configurable fixed measurement range: 0~103.5pF
Configurable variable measurement range: ±15.5pF
The chip can automatically search for the optimal range configuration
Capacitance resolution: 0.1fF
Linearity error: <0.3%
Wide supply voltage range: 2.0V~5.5V
Low power consumption: typical standby current 0.2µA, peak current 0.45mA
Measurement speed: 3-20ms configurable
High temperature measurement accuracy: ±0.5℃@0℃~50℃  Operating temperature range: -55℃~125℃
MDC04 I²C/single-bus interface
MDC02 single-bus interface

Product Model: MDC02

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Product Introduction

High-precision digital capacitive sensing chips - MDC04 and MDC02 are highly integrated digital-analog mixed-signal sensing integrated circuits. The chip is directly connected to the differential capacitive plates near the object under test, utilizing the differences in dielectric constants of different materials. By amplifying, digitally converting, and compensating for tiny capacitance changes, it achieves sensing of material composition. The chip integrates a high-precision 16-bit analog-to-digital converter (ADC) circuit with a capacitance resolution of 0.1fF and a linearity error of less than 0.3%. Additionally, the chip includes a built-in temperature sensing circuit with an accuracy of 0.5℃, which can be used for temperature compensation and otherTemperature sensing scenarios.

MDC04 and MDC02 are four-channel and two-channel high-precision capacitance conditioning chips, respectively. Each channel measures the mutual capacitance between the two electrodes of the capacitor. The programmable fixed measurement range is 0~103.5pF, and the programmable variable conditioning range is ±15.5pF. The chip can automatically search for the optimal range configuration. The chip's measurement operation is flexible, supporting configurable multi-channel measurement combinations, single measurement, periodic cyclic measurement, and other operating modes. The MDC04 chip supports both digital single-bus and I²C communication interfaces, while the MDC02 chip supports the digital single-bus interface. The single-bus interface supports long cable, multi-node distributed sensing.

Compared with similar domestic and international products, MDC04 and MDC02 offer advantages such as wide measurement range, wide operating voltage, low power consumption, multiple interfaces, built-in temperature measurement, small size, and low cost. They can be used in application scenarios such as liquid level detection, moisture content measurement of food/soil, frost detection, and proximity/gesture sensing.

1. Features of the high-precision digital capacitive sensing chip - MDC02:

2. Applications of the high-precision digital capacitive sensing chip - MDC02:

Washing machine liquid level

Smart small home appliances

Printer liquid level

Distance sensing

Water Immersion Sensing

Food moisture content

Soil moisture content

Frost detection

Proximity/gesture sensing