MCP62G

The MCP62 series is a new-generation capacitive sensing microprocessor SOC chip integrating a dual-channel capacitive analog front-end sensing circuit. It can be directly connected to single-ended grounded capacitive plates near the object under test, measuring minute capacitance changes through resonant excitation and signal processing. The excitation frequency is configurable in the range of 10–100MHz, with a 16-bit digital frequency measurement output and a maximum capacitance sensing resolution of 1fF. To address capacitive sensing applications across various industries, the SOC integrates an Arm Cortex-M0 core microprocessor capable of running various embedded sensing algorithms, converting raw oscillation frequency values into capacitance and specific physical quantities such as liquid level, moisture content, and displacement distance. In addition, the analog front end integrates a temperature sensing circuit for temperature-compensated sensing scenarios. The built-in 16KB Flash and 2KB SRAM allow developers to write application software and store sensing calibration and application data. The chip also integrates hardware resources including ADC, advanced timers, general-purpose timers, and basic timers, as well as USART, SPI, and I2C interfaces.

Applications

• Continuous liquid level detection
• Moisture content detection
• Water intrusion detection
• Dielectric property sensing
• Displacement sensing

Key features

• Capacitance Detection Front-End:
• Single-ended capacitance measurement
• Capacitance measurement range: 0~150pF
• Capacitance detection frequency: 10~100MHz
• Core and System:
• 32-bit Arm Cortex-M0
• Operating frequency up to 48MHz
• Memory:
• 16KB Flash
• 2KB SRAM
• Clock, Reset and Power Management:
• 2.5V~5.5V supply voltage
• Power-on/power-down reset (POR/PDR), programmable voltage detector (PVD)
• Embedded 48MHz HSI high-speed oscillator
• Embedded 40KHz LSI low-speed oscillator
• External clock input up to 48MHz (HSE, via OSCIN pin)
• Low Power:
• Multiple low-power modes: Sleep, Stop, and Deep Stop
• Average operating power consumption: 15μA @1Hz
• 5 Timers:
• 1× 16-bit 4-channel advanced-control timer (TIM1)
• 1× 16-bit 4-channel general-purpose timer (TIM3)
• 1× 16-bit basic timer (TIM14)
• 1× independent watchdog timer (IWDG)
• 1× SysTick timer: 24-bit down-counter
• 11 Fast I/O Ports:
• All I/O pins mappable to external interrupts
• All ports support signal voltage not exceeding VDD
• 3 Communication Interfaces:
• 1× USART (with SPI mode support)
• 1× I2C
• 1× SPI
• 1× 12-bit ADC, conversion time as fast as 1μs (1MSPS sample rate), with 5 external channels and 1 internal channel for built-in reference voltage measurement
• CRC calculation unit
• 96-bit unique device ID (UID)
• Debug mode — SWD interface
• Operating temperature range: -40°C ~ +85°C
• Available in QSOP24/QFN24 packages