MCU temperature range copes with IoT environments

15th August 2023

DigiKey

Mick Elliott

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The MAX32690 microcontroller (MCU) from ADI/Maxim is an advanced system-on-chip (SoC) featuring an Arm Cortex-M4F CPU, large Flash and SRAM memories, and Bluetooth 5.2 low energy (LE) radio.

This device unites processing horsepower with the connectivity required for IoT applications.

It is in stock at distributor DigiKey.

Bluetooth 5.2 LE radio supports Mesh, angle-of-arrival (AoA), and angle-of-departure (AoD) for direction finding, long-range (coded), and high-throughput modes. LE audio hardware implemented with software codec is provided separately.

A RISC-V core optionally handles timing-critical controller tasks, freeing the programmer from Bluetooth LE interrupt latency concerns. A cryptographic toolbox (CTB) provides advanced security features, including an MAA for fast elliptic curve digital signature algorithm (ECDSA), advanced encryption standard (AES) engine, TRNG, SHA-256 hash, and secure boot loader.

Internal code and SRAM space can be expanded off-chip through two quad-SPI execute-in-place (SPIXF and SPIXR) interfaces up to 512 MB each. Many high-speed interfaces are supported on the device, including multiple QSPI, UART, CAN 2.0B, and I²C serial interfaces, plus one I²S port for connecting to an audio codec.

All interfaces support efficient DMA-driven transfers between peripheral and memory. A 12-input (8 external), 12-bit SAR ADC samples analogue data at up to 1 MSPS.

The MAX32690 is qualified to operate at a temperature range of -40°C to +105°C, ideal for industrial environments. All devices are available in a 68 TQFN-EP 0.40 mm pitch and a 140-bump WLP with a 0.35 mm pitch package.

The MAX32690EVKIT evaluation kit (EV kit) provides a platform for evaluating the capabilities of the MAX32690 microcontroller, which is an advanced SoC.

It features an Arm Cortex-M4F CPU for efficient computation of complex functions and algorithms, and Bluetooth 5 LE radio designed for wearable and hearable fitness devices, portable and wearable wireless medical devices, industrial sensors/networks, Internet of Things (IoT), and asset tracking.

Applications cover fitness/health wearables, portable and wearable wireless medical devices, asset tracking and industrial sensors and networks