Analog Devices / Maxim Integrated MAX32690 Ultra-Efficient Microcontrollers (MCUs)

Analog Devices / Maxim Integrated MAX32690 Ultra-Efficient Microcontrollers (MCUs) are advanced system-on-chips (SoCs) featuring an Arm® Cortex®-M4F CPU, the latest generation BLUETOOTH® 5.2 Low Energy (LE) radio, and large flash and SRAM memories. These devices unite processing horsepower with the connectivity required for IoT applications. The MAX32690 MCUs operate within a -40°C to +105°C temperature range, ideal for industrial environments. All devices are available in a 68-lead TQFN-EP (0.40mm pitch) package and a 140-bump WLP (0.35mm pitch) package.

The BLUETOOTH 5.2 Low Energy (LE) radio supports multiple modes, including Mesh, angle of arrival (AoA), and angle of departure (AoD) for direction finding, long-range (coded), and high-throughput. LE Audio hardware implemented with the software codec is provided separately. Freeing the programmer from BLUETOOTH LE interrupt latency concerns, a RISC-V core optionally handles timing-critical controller tasks.

A Cryptographic Toolbox (CTB) provides advanced security features, including a Modular Arithmetic Accelerator (MAA) for quick Elliptic Curve Digital Signature Algorithm (ECDSA), Advanced Encryption Standard (AES) Engine, TRNG, SHA-256 hash, and secure boot loader. Internal code and SRAM space expand off-chip through two quad-SPI execute-in-place (SPIXF and SPIXR) interfaces up to 512MB each.

The Analog Devices / Maxim Integrated MAX32690 includes multiple QSPI, UART, CAN 2.0B, and I²C serial high-speed interfaces, plus one I²S port for connecting to an audio codec. All interfaces support efficient DMA-driven transfers between the peripheral and memory. A 12-input (8x external), 12-bit SAR ADC samples analog data at up to 1Msps.

Features

Ultra-efficient microcontroller for battery-powered applications
- 120MHz Arm Cortex-M4 processor with FPU
- Ultra-low-power, 32-bit RISC-V (RV32) coprocessor available to offload data processing
- 7.3728MHz and 60MHz low-power oscillators
- External crystal support (32MHz required for BLUETOOTH LE)
- 32.768kHz RTC clock (requires external crystal)
- 8kHz always-on ultra-low-power oscillator
- 3MB internal Flash, 1MB internal SRAM
- 76.5μW/MHz ACTIVE mode at 1.1V
- 1.8V and 3.3V I/O with no level translators
- External Flash and SRAM expansion interfaces
BLUETOOTH 5.2 LE radio
- Fully open-source BLUETOOTH 5.2 stack available
- Supports AoA, AoD, LE Audio, and Mesh
- High-throughput (2Mbps) mode
- Long-range (125kbps and 500kbps) modes
- -97dBm Rx sensitivity and +4.5dBm Tx power
- Single-ended antenna connection (50Ω)
Package options
- 68-lead TQFN-EP
- 140-bump WLP

Optimal peripheral mix provides platform scalability
- 16-channel DMA
- 5x quad-SPI controller (60MHz) / peripheral (30MHz)
- 4x UARTs with flow control
- 2x I²C
- I²S
- 8x external channel, 12-bit 1Msps SAR ADC
- USB 2.0 hi-speed device
- 16x pulse train engines
- 4x 32-bit/dual 16-bit timers with 8mA high drive
- 2x 32-bit/dual 16-bit low-power timers
- 2x CAN 2.0B controllers
- 4x micropower comparators
- 1-wire controller
Cryptographic Tool Box (CTB) for IP/data security
- Modular Arithmetic Accelerator (MAA), True Random Number Generator (TRNG)
- Secure nonvolatile key storage, SHA-256, AES-128/192/256
- Secure boot ROM
-40°C to +105°C operating temperature range