Analog Devices Inc./Maxim Integrated MAX32626ITK+

Overview

MAX32626ITK+ from Maxim Integrated is an ultra-low-power Arm® Cortex®-M4 with FPU microcontroller designed for wearable and IoT edge nodes. It integrates 512KB flash, 160KB SRAM, hardware AES-128/192/256, Trust Protection Unit (TPU) with modular arithmetic accelerator, and a 10-bit delta-sigma ADC operating at 7.8ksps-enabling secure, battery-constrained biomedical sensing and always-on monitoring in sports watches and medical patches.

For engineers reviewing the MAX32626ITK+ datasheet, MAX32626ITK+ pinout, MAX32626ITK+ application, or MAX32626ITK+ equivalent, this page delivers verified technical context, low-power mode current values (600nA LP0, 2.56μW LP1), secure boot loader support, USB 2.0 full-speed device interface with internal transceiver, and TQFN-68 package–specific pin mapping for rapid schematic integration and firmware validation.

Technical Context

The MAX32626ITK+ implements a dual-oscillator clock architecture: a factory-trimmed 96MHz internal relaxation oscillator for high-performance execution and a 4MHz RC oscillator optimized for ultra-low-power always-on monitoring. Its Peripheral Management Unit (PMU) enables dynamic clock gating and per-peripheral power control across three distinct low-power modes (LP0–LP3), with sub-microamp retention and 5μs wake-up from LP1 using the 96MHz clock source.

Security is implemented at silicon level via a dedicated Trust Protection Unit (TPU) supporting ECDSA signature generation, a true random number generator (TRNG), and a secure boot loader that validates firmware authenticity before execution. The TPU operates independently of the main CPU core and includes a modular arithmetic accelerator (MAA) to offload cryptographic computations without compromising real-time sensor processing latency.

Key Specifications

Pinout & Package

MAX32626ITK+ is housed in a 68-pin TQFN-EP (6mm × 6mm, 0.4mm pitch) with exposed thermal pad. Pin functions are validated per Maxim's official pin configuration diagram (Rev 6, p.14) and pin description table (p.16).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power secure MCU applications.

Compared with Nordic nRF52840 and STMicro STM32L562VE, the MAX32626ITK+ uniquely combines USB PHY integration, 5.5V-tolerant ADC inputs, and TPU-based ECDSA acceleration in a single 6mm × 6mm package-reducing bill-of-materials count and simplifying regulatory testing for Class II wearable medical devices.

Availability

MAX32626ITK+ is available at Aetrix Electronics and suitable for sports watches, wearable medical patches, and portable diagnostic devices requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for FDA-submission-grade designs.

Supply support for MAX32626ITK+ 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 and mixed-signal ICs for demanding applications in healthcare, industrial, and communications markets.

The MAX32626ITK+ belongs to the DARWIN family of ultra-low-power MCUs engineered specifically for battery-operated, security-critical wearable and IoT endpoints-prioritizing energy efficiency, cryptographic integrity, and sensor interface flexibility over raw compute throughput.

FAQ

What is the maximum system clock frequency supported by the MAX32626ITK+?

The MAX32626ITK+ supports a maximum system clock frequency of 96MHz, delivered by its factory-trimmed internal relaxation oscillator. This frequency is USB-compliant (±0.25% tolerance) and enables high-efficiency signal processing for biosensor algorithms without requiring an external crystal. The MAX32626ITK+ also provides a 4MHz RC oscillator option for ultra-low-power monitoring modes.

Does the MAX32626ITK+ include hardware security features beyond AES encryption?

Yes, the MAX32626ITK+ includes a dedicated Trust Protection Unit (TPU) with modular arithmetic accelerator (MAA) for fast ECDSA operations, a true random number generator (TRNG), and a secure boot loader that validates firmware signatures before execution. These features are exclusive to the MAX32626 variant and are not present in the MAX32625. The MAX32626ITK+ implements these capabilities in hardened silicon, meeting IEC 62443-3-3 SL2 requirements.

What package type and pin count does the MAX32626ITK+ use?

The MAX32626ITK+ uses a 68-pin TQFN-EP package (6mm × 6mm, 0.4mm pitch) with exposed thermal pad. This package is explicitly listed in the official datasheet (Rev 6, p.5) and supports reflow soldering at +260°C. The "+" suffix in the part number denotes RoHS-compliant packaging. Pin assignments are documented in the "Pin Configurations" (p.14) and "Pin Description" (p.16) sections of the datasheet.

Can the MAX32626ITK+ operate with a single 3.3V supply, or are multiple voltage rails required?

The MAX32626ITK+ requires three distinct supply domains: VDD12 (1.14–1.26V core), VDD18 (1.71–1.89V digital), and VDDIO/VDDIOH (1.71–3.6V I/O). While a single 3.3V input can be used with external regulators, the device does not support direct 3.3V connection to VDD12 or VDD18. The MAX32626ITK+ integrates internal LDOs but mandates separate 1.2V and 1.8V supplies for guaranteed operation across -30°C to +85°C.

What ADC performance specifications are guaranteed for the MAX32626ITK+ over temperature?

The MAX32626ITK+ guarantees 10-bit resolution, ±2 LSB integral nonlinearity (INL), ±1 LSB differential nonlinearity (DNL), and 58.5dB SNR for its delta-sigma ADC across the full -30°C to +85°C operating range. Sampling rate is fixed at 7.8ksps. Input voltage ranges are specified per channel: AIN0–AIN1 support 0.05V to 5.5V (buffer bypassed), while AIN2–AIN3 are limited to 0.05V to 3.6V. All specs are production-tested at +25°C and +85°C, with -30°C coverage confirmed by design.