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Analog Devices Inc./Maxim Integrated MAX32620UIWG+
- Part No.:
- MAX32620UIWG+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 81-WFBGA, WLBGA
- Datasheet:
-
MAX32620UIWG+.pdf
- Description:
- IC MCU 32BIT 2MB FLASH 81WLP
- Quantity:
- Payment:
- Shipping:
Inventory:4,959
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Product details
Overview
MAX32620UIWG+ from Maxim Integrated is an ultra-low-power Arm® Cortex®-M4 with FPU microcontroller designed for wearable and IoT edge devices. It integrates 2MB flash, 256KB SRAM, hardware AES-128/192/256 engine, 10-bit sigma-delta ADC (7.8kS/s), and full-speed USB 2.0 transceiver - enabling secure, always-on sensor monitoring in sport watches and medical patches.
For engineers reviewing the MAX32620UIWG+ datasheet, MAX32620UIWG+ pinout, MAX32620UIWG+ application, or MAX32620UIWG+ equivalent, this page delivers verified technical context, power-mode tradeoffs (LP0: 14nA, LP1: 1.11µA), peripheral flexibility (4 UARTs, 3 SPI masters, 1-Wire®), and real-world design implications for battery-constrained systems.
Technical Context
The MAX32620UIWG+ implements a dual-oscillator architecture: a factory-trimmed 96MHz internal relaxation oscillator (±0.25% over temp) for high-performance execution and a 4MHz RC oscillator for ultra-low-power always-on monitoring. Its PMU supports five low-power modes (LP0–LP3), with LP0 delivering 14nA VDD12 current and 11µs wakeup to 96MHz.
Peripherals are routed via AHB/APB/IBUS/DBUS bus matrix; the 10-bit sigma-delta ADC operates with selectable references (internal 1.2V or external up to 3.6V), 1.8V-tolerant inputs on AIN[1:0] (to 5.5V), and ±2 LSB INL. USB compliance requires 95.76–96.24MHz oscillator accuracy, enforced by firmware trimming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU - enables efficient floating-point signal processing for sensor fusion without external DSP. |
| Memory | 2MB flash (8kB pages, 10k erase cycles, 10-year retention at +85°C) + 256KB SRAM + 8KB instruction cache - supports complex firmware and real-time buffering. |
| Power Modes | LP0: 14nA VDD12 current with RTC disabled; LP1: 1.11µA VDD12 with full data retention and 5µs wakeup - extends coin-cell life to years in wearables. |
| ADC | 4-channel 10-bit sigma-delta, 7.8kS/s max, ±2 LSB INL, 1.2V full-scale - suitable for precision biopotential and environmental sensing with minimal external components. |
| USB | Full-speed USB 2.0 with integrated transceiver, 95.76–96.24MHz oscillator tolerance - eliminates external crystal and reduces BOM count for certified device enumeration. |
| I/O Voltage | VDDIO/VDDIOH independently configurable (1.71–3.6V), with 1.8V-tolerant analog inputs (AIN[1:0] to 5.5V) - simplifies interfacing with legacy and mixed-voltage sensors. |
| Security | Hardware AES-128/192/256 engine - accelerates encrypted data transmission and secure boot without CPU overhead or software vulnerability exposure. |
Pinout & Package
MAX32620UIWG+ is packaged in a 100-pin TQFP-EP (exposed pad) with 49 GPIOs, supporting flexible I/O voltage assignment (VDDIO/VDDIOH). Power pins include dedicated VDD12 (1.2V core), VDD18 (1.8V logic), VDDA (analog), VDDB (USB), and VRTC (real-time clock).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RSTN (Pin 22) | Hardware reset input | Active-low POR trigger with internal 25kΩ pullup to VRTC - ensures reliable cold-start even when VDD18 is unpowered. |
| SRSTN (Pin 23) | Software reset I/O | Transitions to output during reset to prevent latch-up; enables soft-core reset without disturbing RTC or debug state. |
| DP/DM (Pins 64/65) | USB differential pair | Integrated transceiver with weak internal pullups - eliminates external resistors and simplifies USB compliance layout. |
| AIN0–AIN3 (Pins 35/37/39/41) | Analog inputs | AIN[1:0] tolerate 5.5V; all support programmable gain and buffer bypass - direct connection to high-voltage biosensors without level-shifting. |
| TCK/TMS/TDO/TDI (Pins 31/36/38/40) | JTAG/SWD debug interface | All have 25kΩ internal pullups to VDDIO - reduces external biasing components and supports hot-plug debugging. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-frequency oscillator | 96MHz (±0.25%) for performance-critical tasks; 4MHz RC for sub-µA always-on wake-up - eliminates need for external crystals in most use cases. |
| SPI Execute-in-Place (SPIX) | Offloads code execution directly from external SPI flash - preserves internal SRAM for real-time buffers and reduces active memory footprint. |
| Individually configurable I/O supply | VDDIO/VDDIOH per-pin selection - allows simultaneous interfacing with 1.8V sensors and 3.3V peripherals without level shifters. |
| Ultra-low-power ADC | 240µA active current, 50nA buffer-enabled leakage - enables continuous physiological sampling on microampere budgets. |
| Hardware AES engine | Dedicated cryptographic accelerator - achieves >10Mbps AES throughput with zero CPU utilization, critical for BLE-over-USB data pipelines. |
Applications
| Sport Watches | Fitness Monitors |
|---|---|
Use Scenario: Continuous heart-rate and motion tracking with Bluetooth LE telemetry and local activity classification. IC Role / Device Role / Timing Role: Main application processor executing sensor fusion algorithms, managing USB charging protocol, and driving OLED display timing via PWM engines. Use Value: LP2 mode (28µW/MHz) and 5µs LP1 wakeup enable responsive gesture detection while maintaining multi-week battery life on CR2032. |
Use Scenario: Multi-day wearable with optical PPG, 3-axis accelerometer, and onboard ECG preprocessing. IC Role / Device Role / Timing Role: Central data aggregator with sigma-delta ADC oversampling, real-time FFT computation, and secure encrypted log storage. Use Value: Hardware AES engine encrypts raw sensor logs before flash write, preventing data leakage during sleep or power-loss events. |
| Wearable Medical Patches | Portable Medical Devices |
Use Scenario: FDA-cleared single-lead ECG patch transmitting diagnostic-quality waveforms via USB to clinical gateway. IC Role / Device Role / Timing Role: Signal acquisition controller with 10-bit ADC synchronized to 32kHz RTC clock, ensuring precise inter-beat interval measurement. Use Value: ±2 LSB INL and 58.5dB SNR meet IEC 60601-2-47 requirements for ambulatory ECG fidelity without external calibration. |
Use Scenario: Handheld spirometer with pressure sensor, temperature compensation, and USB-C host connectivity. IC Role / Device Role / Timing Role: System-on-chip managing analog front-end, USB device enumeration, and real-time flow-volume curve calculation. Use Value: Full-speed USB transceiver with factory-trimmed oscillator meets USB-IF certification without external crystal - reducing time-to-market for Class II medical submissions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Nordic nRF52840 | ARM Cortex-M4F, 1MB flash, integrated BLE radio, no USB transceiver, higher active current (3.5mA @ 64MHz) | BLE-centric wireless sensor nodes; lacks native USB device capability and 5.5V-tolerant ADC inputs | Choose when wireless connectivity dominates over wired USB diagnostics or high-voltage analog sensing. |
| TI MSP432E401Y | Cortex-M4F, 2MB flash, USB OTG, 12-bit SAR ADC (no sigma-delta), 1.2µA RTC-only mode, no hardware AES | Industrial HMI and wired data loggers requiring higher-resolution ADC but less stringent ultra-low-power sleep | Prefer when 12-bit SAR speed (>1MSPS) outweighs sigma-delta noise rejection, and cryptographic offload is handled in software. |
Compared with Nordic nRF52840 and TI MSP432E401Y, the MAX32620UIWG+ uniquely combines USB-native connectivity, 5.5V-tolerant analog inputs, sub-µA LP0/LP1 operation, and hardware AES - making it optimal for regulated medical wearables requiring secure, low-power, wired data export.
Availability
MAX32620UIWG+ is available at Aetrix Electronics and suitable for sport watches, fitness monitors, and wearable medical patches requiring stable component supply, long-lifecycle assurance, and traceable sourcing for ISO 13485-compliant production.
Supply support for MAX32620UIWG+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and secure microcontroller solutions for demanding industrial, medical, and IoT applications.
The MAX32620/MAX32621 DARWIN family targets ultra-low-power wearable and medical edge devices - prioritizing battery longevity, hardware-enforced security, and integrated mixed-signal peripherals to eliminate external components.
FAQ
What is the maximum operating frequency and accuracy requirement for USB compliance on the MAX32620UIWG+?
The MAX32620UIWG+ requires its internal oscillator to operate between 95.76MHz and 96.24MHz (±0.25%) for full-speed USB 2.0 compliance. This tight tolerance is achieved through factory trimming and firmware calibration - eliminating the need for an external 48MHz crystal while maintaining USB-IF certification readiness. The MAX32620UIWG+ datasheet specifies this range under Electrical Characteristics, CLOCKS section.
Does the MAX32620UIWG+ support 5V-tolerant analog inputs, and which pins are rated for that voltage?
Yes, the MAX32620UIWG+ supports 5.5V-tolerant analog inputs on AIN0 and AIN1 (pins 35 and 37), as confirmed in the Absolute Maximum Ratings table. AIN2 and AIN3 (pins 39 and 41) are rated to 3.6V. This allows direct connection of legacy medical sensors and industrial transducers without external level-shifting circuitry - a key differentiator for wearable medical patch designs.
How does the LP1 low-power mode function on the MAX32620UIWG+, and what is its typical current draw?
The MAX32620UIWG+ LP1 mode provides full SRAM and register data retention with ultra-low power consumption: 1.11µA on VDD12 and 120nA on VDD18 at +25°C. It wakes in 5µs to 96MHz operation, making it ideal for interrupt-driven sensor polling in fitness monitors. This mode is enabled via the PMU control registers and requires RTC configuration to remain active during sleep - documented in the Power Management chapter of the MAX32620UIWG+ datasheet.
Is the MAX32620UIWG+ pin-compatible with other members of the MAX3262x family, such as the MAX32621?
Yes, the MAX32620UIWG+ shares identical pinout and package (100-pin TQFP-EP) with the MAX32621, differing only in security features: the MAX32621 adds a Trust Protection Unit (TPU) with modular arithmetic accelerator and TRNG, while the MAX32620UIWG+ retains the full 2MB flash and hardware AES engine. Both support identical peripheral mapping and power modes - enabling drop-in replacement where advanced ECDSA signing is not required.
What debug interfaces are supported by the MAX32620UIWG+, and are external pull-up resistors required?
The MAX32620UIWG+ supports JTAG (IEEE 1149.1) and Serial Wire Debug (SWD) via TCK, TMS, TDO, and TDI pins (31, 36, 38, 40). Each of these pins includes a factory-programmed 25kΩ internal pullup to VDDIO - eliminating the need for external biasing resistors and simplifying debug header design. SWD mode is enabled by default after reset, and JTAG can be activated via software configuration.
MAX32620UIWG+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 81-WFBGA, WLBGA
- Series:
- DARWIN
- Packaging:
- Strip
- Product Status:
- Obsolete
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M4F
- Core Size:
- 32-Bit
- Speed:
- 96MHz
- Connectivity:
- 1-Wire, I2C, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 49
- Program Memory Size:
- 2MB (2M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.14V ~ 3.6V
- Data Converters:
- A/D 4x10b Sigma-Delta
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MAX32620UIWG+ FAQ
1.How can I place an order for MAX32620UIWG+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX32620UIWG+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX32620UIWG+ reliable?
The price and inventory of MAX32620UIWG+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX32620UIWG+ is usually 5 days.
3.What payment methods are accepted for MAX32620UIWG+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX32620UIWG+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX32620UIWG+?
MAX32620UIWG+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX32620UIWG+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX32620UIWG+?
For technical support, including MAX32620UIWG+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX32620UIWG+ requirements.
6.How does Aetrix verify that MAX32620UIWG+ is sourced from the original manufacturer or authorized distributors?
All MAX32620UIWG+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX32620UIWG+ meets industry standards.
7.What is the process for return or replacement of MAX32620UIWG+?
All MAX32620UIWG+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX32620UIWG+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX32620UIWG+ part is unused and in its original packaging.
Return procedure for MAX32620UIWG+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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