Analog Input/Output

• Dual-channel, 24-bit ADC (ADuCM360)
• Single-channel, 24-bit ADC (ADuCM361)
• Programmable ADC output rate (3.5 Hz to 3.906 kHz)
• 50 Hz/60 Hz synchronous noise suppression
• 50 SPS continuous conversion mode
• 16.67 SPS single conversion mode
• All ADCs adopt flexible input multiplexing, with selectable input channels
• Two 24-bit multi-channel ADCs (ADC0 and ADC1)
• 6 differential or 11 single-ended input channels
• 4 internal channels, used for monitoring DAC, temperature sensor, IOVDD/4 and AVDD/4 (only ADC1)
• Programmable gain (1 to 128)
• Root Mean Square (RMS) noise: 52 nV (at 3.53 Hz), 200 nV (at 50 Hz)
• Programmable sensor excitation current source
• On-chip precise reference voltage source
• Single 12-bit voltage output DAC
• NPN mode for 4 mA to 20 mA loop applications

Microcontroller

• ARM Cortex-M3 32-bit processor
• Serial line download and debugging
• Internal clock crystal for wake-up timer
• 16 MHz oscillator with 8 programmable dividers

Memory

• 128 kB Flash/EE memory, 8 kB SRAM
• Online debugging/download via serial line and UART

Power supply voltage range

• 1.8 V to 3.6 V (maximum)

Power consumption during MCU active mode

• Core power consumption: 290 μA/MHz
• System total current consumption when the core operates at 500 kHz is 1.0 mA (both ADCs are on, input buffers are off, PGA gain is 4, one SPI port is on, all timers are on)

Power consumption during power-saving mode

• 4 μA (wake-up timer is active)

On-chip peripherals

• UART, I 2
  C and 2 * SPI serial I/O
• 16-bit PWM controller
• 19-pin multi-function GPIO port
• 2 general-purpose timers
• Wakeup timer/watchdog timer
• Multi-channel DMA and interrupt controller

Package and temperature range

• 48-pin, 7 mm * 7 mm LFCSP package
• Rated operating temperature range: -40°C to +125°C

Development tools

• Low-cost QuickStart development system
• Supports third-party compilers and simulation tools
• Multifunctional security features enhance diagnostic capabilities

Application

• Industrial automation and process control
• Intelligent precision detection system
• 4 mA to 20 mA loop-powered intelligent sensor system
• Medical equipment, patient monitoring