The MC1081 series is a highly integrated, multi-channel, wide-frequency digital capacitive sensing chip. The chip is directly connected to the measurement electrode plate, sensing capacitance changes through oscillation frequency variations. The excitation frequency is configurable in the range of 0.1~30MHz, and the measurement frequency output is a 16-bit digital signal, with a corresponding maximum capacitance resolution of 1fF. The chip supports multiple working modes, including single-ended capacitance, differential floating capacitance, and mutual capacitance. The chip integrates a 16-bit high-precision digital temperature sensor internally, suitable for scenarios requiring temperature compensation and other temperature composite sensing. The chip adopts a fully digital design, configuring various functions and reading data through the I2C interface, supporting communication rates up to 1Mbps.
Capacitive sensing detects tiny capacitance changes of the measured substance under electric field excitation, enabling dielectric detection of different materials. It is a non-contact, high-resolution, high-speed, low-power, low-cost sensing method. Compared with similar domestic and international products, the MC1081 chip can measure up to 10 single-ended capacitances or 5 differential capacitances simultaneously. The capacitance excitation frequency adjustment range is wide, amplitude is configurable, capacitance measurement working modes are diverse and flexibly configurable, operating voltage range is wide, peripheral circuits are simple, and applicability is strong. The chip can be widely used in non-contact dielectric detection, liquid level measurement, touch control, proximity sensing, water immersion sensing, dry/humidity detection, moisture content analysis, and otherscenarios.
1. Characteristics of digital capacitive sensing chip - MC1081:
Supports up to 10 single-ended capacitance/5 differential capacitance measurements
Capacitance measurement range: 1pF~10nF
Measurement excitation: 100KHz~30MHz, amplitude configurable
Capacitance/frequency resolution: 16bit
Supports active shielding, adjacent mutual capacitance measurement
Supply voltage range: 2.3V~5.5V, built-in LDO
Single Channel Conversion Time: Configurable from 0.1ms to 23.5ms
Built-in 16-bit High-Precision Digital Temperature Measurement
Typical single-channel average current: 2.5μA@1Hz
Sleep current: 50nA
Communication interface: I2C
Operating temperature: -55℃~+125℃
QFN16/TSSOP16/DFN8 package options available
2. Applications of digital capacitive sensing chip - MC1081:
Liquid Level Measurement
Moisture Content Measurement
Water Immersion Sensing
Dryness and Humidity Analysis
Dielectric Detection
Proximity Sensing
Button touch control
Gesture Recognition
