Click here to ask about the production status of specific part numbers. MAX32680 Ultra-Low-Power Arm Cortex-M4F with Precision Analog Front-End and Bluetooth LE 5.2 General Description Benefits and Features The MAX32680 microcontroller (MCU) is an advanced Ultra-Low-Power Wireless Microcontroller system-on-chip (SoC), featuring an Arm Cortex -M4F Internal 100MHz Oscillator CPU for efficient computation of complex functions and 512KB Flash and 128KB SRAM algorithms that is qualified to operate at a temperature Optional ECC on One 32KB SRAM Bank range of -40C to +85C. The SoC integrates power reg- Bluetooth 5.2 LE Radio ulation and management with a single-inductor multiple- Dedicated, Ultra-Low-Power, 32-Bit RISC-V output (SIMO) buck regulator system. Onboard is the lat- Coprocessor to Offload Timing-Critical Bluetooth est generation Bluetooth 5.2 Low Energy (LE) radio, sup- Processing porting LE Audio, angle of arrival (AoA), and angle of Fully Open-Source Bluetooth 5.2 Stack Available departure (AoD) for direction finding, long-range (coded) Supports AoA, AoD, LE Audio, and Mesh modes, and high-throughput modes. High-Throughput (2Mbps) Mode The device offers large onboard memory with 512KB flash Long-Range (125kbps and 500kbps) Modes and 128KB SRAM, with optional error correction coding Rx Sensitivity: -97.5dBm Tx Power: +4.5dBm (ECC) on one 32KB SRAM bank. This 32KB bank can be Single-Ended Antenna Connection (50) optionally retained in BACKUP mode. An 8KB user one- Smart Integration Reduces BOM, Cost, and PCB Size time programmable (OTP) area is available, and 8 bytes Two 16-Bit to 24-Bit - ADCs are retained, even during power-down. 12 Channels, Assignable to Either ADC An analog front-end (AFE) provides two 12-channel delta- Flexible Resolution and Sample Rates sigma (-) analog-to-digital converters (ADC) with fea- 24-Bits at 0.4ksps, 16-Bits at 4ksps tures and specifications optimized for precision sensor Four External Input, 10-Bit - ADC 7.8ksps measurement. Each - ADC can digitize external analog 12-Bit DAC signals as well as system temperature. An optional pro- On-Die Temperature Sensor 2 grammable gain amplifier (PGA) with gains of 1x to 128x Digital Peripherals: Two SPI, Two I C, up to Four precedes each ADC. ADC outputs can be optionally con- UART, and up to 36 GPIOs verted on the fly from integer to single-precision floating- Timers: Six 32-Bit Timers, Two Watchdog Timers, point format. A 12-bit digital-to-analog converter (DAC) is Two Pulse Trains, 1-Wire Master also included. The device also provides robust security Power Management Maximizes Battery Life features such as an advanced encryption standard (AES) 2.0V to 3.6V Supply Voltage Range engine, true random number generator (TRNG), and se- Integrated SIMO Power Regulator cure boot. Dynamic Voltage Scaling (DVS) The device is available in an 88L LGA (10mm x 10mm, 23.8A/MHz ACTIVE Mode Current at 3.0V 0.4mm pitch) package. Coremark 4.4A at 3.0V Retention Current for 32KB SRAM Selectable SRAM Retention in Low-Power Modes Applications Industrial Pressure, Temperature, Level, and Flow Robust Security and Reliability TRNG Sensors/Transmitters Medical Pressure and Temperature Sensors Secure Nonvolatile Key Storage and AES-128/192/ 256 Secure Boot to Protect IP/Firmware Wide, -40C to +85C Operating Temperature Ordering Information appears at end of data sheet. 1-Wire is a registered trademark of Maxim Integrated Products, Inc. Arm and Cortex are registered trademarks of Arm Limited. Bluetooth is a registered trademark of Bluetooth SIG, Inc. Cordio is a registered trademark of Sunrise Micro Devices, Inc. Coremark is a registered trademark of EMBCC. 19-101233 Rev 0 8/21ADC1 REF MUX ADC0 REF MUX MAX32680 Ultra-Low-Power Arm Cortex-M4F with Precision Analog Front-End and Bluetooth LE 5.2 Simplified Block Diagram MAX32680 100MHz (IPO) EXTERNAL CLOCK 32-BIT RISC-V (RV32) BLUETOOTH 5 RADIO TRANSCEIVER ANT HOST Arm Cortex M4 WITH HFXOUT 16MHz TO 32MHz (ERFO) FPU CPU HFXIN 7.3728MHz (IBRO) SERIAL WIRE DEBUG NVIC 8kHz (INRO) 2 I S MASTER/SLAVE 60MHz (ISO) MEMORY 2 2 HIGH-SPEED I C MASTER FLASH 512KB GPIO AND SHARED PAD FUNCTIONS POWER-ON RESET, 2 4-WIRE UART RSTN BROWNOUT MONITOR, SRAM0 32KB + ECC TIMERS/PWM CAPTURE/COMPARE SUPPLY VOLTAGE MONITORS SRAM1 32KB LOW-POWER TIMERS 2-WIRE UART SINGLE-WIRE DEBUG SRAM2 48KB 2-WIRE LPUART V REGI SPI SRAM3 16KB V 2 SSPWR I C BLE LDO IN UART GPIO/ CACHE 16KB V 2 x SPI MASTER/SLAVE LPUART SS SPECIAL 2 LXA I S FUNCTION BOOT ROM LXB 1-Wire UP TO 36 1-Wire MASTER (OWM) VBST 4-CH 10-BIT - ADC VREGO A 2 PULSE TRAIN ENGINES V REGO B 4-CH DMA EXT CLK INPUT/OUTPUT SIMO VOLTAGE REGULATION, V REGO C DYNAMIC VOLTAGE SCALING 4 32-BIT TIMERS 2 WATCHDOG MICROPOWER VREGO D AND WAKE-UP TIMER TIMER COMPARATORS V DDA BB POWER CONTROL V DDA RF UNIQUE ID 2 32-BIT LPTIMERS BLUETOOTH ANTENNA CONTROL V SSA BB V V SSA REGI EXTERNAL INTERRUPTS VDDA BB VDDA V DDA RF V DDIO VCOREA 4 EXT CHANNEL V V DDIOH COREB ANALOG 10-BIT - ADC VDDIOH VCOREA CONTROL/DATA VDDIO VCOREB (4-WIRE SPI) VDDA 2 MICROPOWER GND LNA COMPARATORS 4 2 4 SECURITY 2 32-BIT CRC AES-128/192/256 ACCELERATOR ANALOG FRONT-END (AFE)ANALOG FRONT-END (AFE) SECURE NV KEY SECURE BOOTLOADER INT REF TRUE RANDOM NUMBER GENERATOR (TRNG) VREF (1.024V,1.5V, 2.048V, 12-BIT DAC DAC12 OUT 2.5V) BUFFER 10A TO 1600A BUFFER AVDD BUFFER AIN0 AVDD AIN1 16-BIT TO 24-BIT - AGND PGA AIN2 3RD-ORDER MODULATOR AIN3 ADC1 REF1P AIN4 BUFFER AIN5 REF1N BUFFER AIN6 AIN7 REF0P BUFFER BUFFER AIN8 REF0N AIN9 AIN0 16-BIT TO 24-BIT - AIN1 PGA AIN10 3RD-ORDER MODULATOR AIN11 ADC0 VBIAS BUFFER TEMP AVDD SENSOR BUFFER www.maximintegrated.com Maxim Integrated 2 BUS MATRIX AHB, APB, IBUS, DBUS Tx/Rx Tx/Rx Tx/Rx Tx/Rx Tx/Rx Tx/Rx FIFO FIFO FIFO FIFO FIFO FIFO CAP1N CAP1P CAP0N CAP0P