MAX32675C

RECOMMENDED FOR NEW DESIGNS

Ultra-Low-Power Arm Cortex-M4F with Precision Analog Front-End and HART for Industrial and Medical Sensors

The MAX32675C is a highly integrated, mixed-signal, ultra-low-power microcontroller for industrial applications and is especially suitable for 4-20mA loop-powered sensors and transmitters.

Data Sheet (Rev. 0) Product Selection Table
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Overview

  • Low-Power, High-Performance for Industrial Applications
    • 12MHz Arm Cortex-M4 with FPU
    • 384KB (376KB User) Flash Memory
    • 160KB SRAM (128KB with ECC Enabled)
      • Optionally Retained in Low-Power Modes
    • ACTIVE Current (IDD_ACTS) ≤ 2.1mA at TA = +85°C
      • Ideal for 4-20mA Current Sense Loops
    • Startup Current Typical (IDD_STRT) of 1.02mA
    • 375μA Full Memory Retention Current in BACKUP(IDD_FBKUS)
  • Smart Integration Reduces BOM, Cost, and PCB Size
    • Integrated HART Modem
    • Two Δ-Σ ADCs
      • 12 Channels, Assignable to Either ADC
      • Flexible Resolution and Sample Rates
        • 24-Bits at up to 0.4ksps
    • 12-Bit DAC
    • Internal Reference
    • Digital Peripherals
      • Up to Two SPI
      • Up to Three I2C
      • Up to Three 4-Wire UART
      • Up to One 4-Wire Low-Power UART (LPUART)
    • 8-Channel Standard DMA Controller
    • Up to 36 GPIOs
    • Timers
      • Four 32-Bit Timers
      • Two 32-Bit Low-Power Timers (LPTMR)
      • Two Windowed Watchdog Timers
    • Robust Security and Reliability
      • UART ROM Bootloader
      • AES 128/192/256 Hardware Acceleration Engine
      • Persistent Key Storage
      • 32-Bit CRC Acceleration Engine
      • Wide, -40°C to +105°C Operating Temperature Range

The MAX32675C is a highly integrated, mixed-signal, ultra-low-power microcontroller for industrial applications and is especially suitable for 4-20mA loop-powered sensors and transmitters. It is based on an ultra-low-power Arm® Cortex®- M4 with floating point unit (FPU) and includes 384KB (376KB user) flash and 160KB of SRAM. Error correction coding (ECC), capable of single-error correction, double-error detection (SEC-DED), is implemented over the entire flash, SRAM, and cache to ensure ultra-reliable code execution for demanding applications.

An analog front-end (AFE) with an integrated, low-power HART modem enables the bidirectional transfer of digital data over a current loop with industrial sensors for configuration and diagnostics. The AFE also provides two 12-channel delta-sigma (Δ-Σ) ADCs with features and specifications optimized for precision sensor measurement. Each Δ-Σ ADC can digitize external analog signals as well as system temperature. A PGA with gains of 1x to128x precedes each ADC. ADC outputs can be optionally converted on the fly from integer to single-precision floating-point format. A 12-bit DAC is also included.

The device also provides robust security features, including an AES engine and persistent key storage.

APPLICATIONS

  • 4-20mA Industrial Sensors and Transmitters
  • Industrial Pressure, Temperature, Flow, and LevelSensors/Transmitters
  • Medical Pressure, Temperature, and Flow Sensors
MAX32675C
Ultra-Low-Power Arm Cortex-M4F with Precision Analog Front-End and HART for Industrial and Medical Sensors
MAX32675C Block Diagram 72L Land Grid Array Package Drawing MAX32675C Chip Image
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Documentation

Data Sheet 1

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Software Resources

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