Analog Devices Inc. MAX32675C Ultra-Low-Power Arm® Cortex®-M4F MCUs
Analog Devices MAX32675C Ultra-Low-Power Arm® Cortex®-M4F MCUs are highly integrated, mixed-signal microcontrollers for industrial applications and are especially suitable for 4mA to 20mA loop-powered sensors and transmitters. Based on an ultra-low-power Arm Cortex- M4 with a floating point unit (FPU), the MCUs include 384KB (376KB user) flash and 160KB of SRAM. Error correction coding (ECC), capable of single-error correction and 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 digital data transfer 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 to 128x precedes each ADC. ADC outputs can be optionally converted from integer to single-precision floating-point format on the fly. A 12-bit DAC is also included. The ADI MAX32675C MCUs also provide robust security features, including an AES engine and persistent key storage.
Features
- 12MHz Arm Cortex-M4 with FPU
- 384KB (376KB user) Flash memory
- 160KB SRAM (128KB with ECC enabled), optionally retained in low-power modes
- ≤2.1mA ACTIVE current (IDD_ACTS) at TA = +85°C, ideal for 4mA to 20mA current sense loops
- 1.02mA typical startup current (IDD_STRT)
- 375μA full memory retention current in BACKUP (IDD_FBKUS)
- Integrated HART modem
- 2x Δ-Σ ADCs
- 12x channels, assignable to either ADC
- Flexible resolution and sample rates, 24-bits at up to 0.4ksps
- 12-bit DAC
- Internal reference
- 8-channel standard DMA controller
- Digital peripherals
- Up to 2x SPI
- Up to 3x I2C
- Up to 3x 4-wire UART
- Up to 1x 4-wire low-power UART (LPUART)
- Up to 36x GPIOs
- Timers
- 4x 32-bit timers
- 2x 32-bit low-power timers (LPTMR)
- 2x 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
Applications
- 4mA to 20mA industrial sensors and transmitters
- Industrial pressure, temperature, flow, and level sensors/transmitters
- Medical pressure, temperature, and flow sensors
Additional Resource
Simplified Block Diagram
Publicado: 2024-09-10
| Actualizado: 2025-07-03