Fig. 1: MIO168 r1B2 prototype

Feature list

• On-board STM32F446ZCT6 high-performance foundation line MCU, ARM Cortex-M4 with DSP and FPU, 256 KiB Flash, LQFP-144 package
• 2 x 16-pin dual row 3.81 mm I/O connectors
• 8 x protected digital inputs (3.3/5/24 V), 2 x fast/slow, 6 x slow
• 8 x digital outputs (low-side) with multiple protections and FAULT detection, 550 mA per channel (current limit 1 A)
• 2 x PWM outputs, protected
• 4 x analog bipolar inputs with protection. Voltage or current selection per channel. 14-bit ADC, replaceable with pin compatible 12- or 16-bit version. Switchable bias for NTC sensors on first two channels
• 2 x analog bipolar outputs (+/-5 V, +/-10 V, 0-5 V, 0-10 V). Voltage or current output with protection. 12-bit DAC, replaceable with pin compatible 14- or 16-bit version
• 2 x analog bipolar outputs +/-10 V. 12-bit DAC, replaceable with pin compatible 14- or 16-bit version
• On-board isolated +/-15 V (2W) power supply with +/-12 V, +5 V and +3.3 V LDOs
• Firmware download via SPI
• Optional SWD for debugging
• Optional Micro SD card
• I2C EEPROM for storing board specific parameters
• Dimensions: 146 x 95 mm, 4-layer PCB

Fig. 2: Isolated DIB, EEPROM, isolated power rails

Fig. 3: MCU, optional micro SD card

Fig. 4: Voltage/Current output DACs

Fig. 5: Dual voltage output DAC, four low-side switches, 2 x PWM outputs

Fig. 6: 8 digital dual range inputs

Fig. 7: Four voltage/current analog input ADC