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Analog Devices Inc./Maxim Integrated MAX32675ATK+
- Part No.:
- MAX32675ATK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 68-WFQFN Exposed Pad
- Datasheet:
-
MAX32675ATK+.pdf
- Description:
- IC MCU 32BIT 384KB FLASH 68TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,115
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Product details
Overview
The MAX32675ATK+ from Analog Devices is an ultra-low-power Arm® Cortex®-M4F microcontroller with integrated precision analog front-end, designed for 4–20mA loop-powered industrial sensors and transmitters. It features a 100MHz CPU with FPU, 384KB flash (ECC-protected), 160KB SRAM (128KB ECC-enabled), dual 12-channel Δ-Σ ADCs (24-bit @ 0.4ksps), and a 12-bit DAC - enabling high-accuracy sensor signal acquisition and local processing in harsh environments.
For engineers reviewing the MAX32675ATK+ datasheet, MAX32675ATK+ pinout, MAX32675ATK+ application, or MAX32675ATK+ equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in industrial and medical sensing, and actionable alternative part guidance - all grounded in the official MAX32675 datasheet Rev 1 (Jan 2022).
Technical Context
The MAX32675ATK+ implements a dual Δ-Σ ADC architecture with independent PGAs (1×–128× gain) and on-the-fly integer-to-float conversion, supporting simultaneous high-resolution measurement of up to 12 external analog inputs per ADC plus on-die temperature. Its memory subsystem includes SEC-DED ECC across full flash, SRAM, and cache - critical for functional safety in industrial control loops.
Power management supports five operational modes: ACTIVE (64.5μA/MHz @ 1.1V/100MHz), SLEEP (21.1μA fixed @ 1.1V), DEEPSLEEP (4.0μA), BACKUP (2.84μA with full 160KB SRAM retention), and STORAGE (0.362μA). Security is enforced via AES-128/192/256 engine, SP800-90B-compliant TRNG, secure bootloader, and tamper-resistant NV key storage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4F @ 100MHz with hardware FPU - enables real-time floating-point math for sensor linearization and compensation algorithms. |
| Memory | 384KB flash (SEC-DED ECC), 160KB SRAM (128KB ECC-enabled) - ensures reliable firmware execution and data integrity in extended temperature ranges. |
| Analog Peripherals | Dual 12-channel Δ-Σ ADCs (24-bit @ 0.4ksps, 16-bit @ 4ksps), 12-bit DAC, on-die temp sensor, PGA (1×–128×) - supports multi-sensor fusion and closed-loop analog output in single-chip transmitters. |
| Power Efficiency | 2.84μA BACKUP mode current with full 160KB SRAM retention at VDDIO = 3.3V - enables battery-backed operation for >10 years in low-duty-cycle field devices. |
| Operating Range | −40°C to +105°C ambient, 2.7V–3.63V VDDIO/VDDA - qualified for deployment in industrial enclosures and medical equipment without derating. |
| Security | AES-128/192/256 engine, SP800-90B TRNG, secure boot, and nonvolatile key storage - meets IEC 62443-3-3 SL2 requirements for embedded device authentication and firmware protection. |
Pinout & Package
The MAX32675ATK+ is housed in a 68-pin TQFN package (package code T6888MK+2, outline 21-0510) with 0.4mm pitch and exposed thermal pad. Pin assignments are validated per datasheet Figure 34 (Pin Configuration, 68 TQFN) and Table 12 (Pin Description).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO / VDDA | Digital & analog supply input | Must be connected externally; powers GPIO, digital peripherals, and AFE - requires separate 2.7–3.63V rail with low-noise decoupling. |
| VCORE | Core voltage input | Supplies CPU and memory subsystem; internally regulated (0.9V/1.0V/1.1V selectable); requires 0.855–1.155V with tight tolerance. |
| AIN[0–11] | Analog input channels | 12 dedicated differential/single-ended inputs assignable to either ADC; support programmable bias (VBIAS) and reference selection (REF0P/N, REF1P/N). |
| ADC0_RDY / ADC1_RDY | Conversion ready flags | Active-low signals indicating end-of-conversion for each ADC - used for interrupt-driven sampling or DMA synchronization. |
| DAC12_OUT | 12-bit DAC output | Single buffered voltage output (rail-to-rail) with internal 1.024V/1.5V/2.048V/2.5V reference - drives 4–20mA loop drivers or calibration actuators. |
| SPI/I2C/UART pins | Serial interface terminals | Up to two I2C masters/slaves, two UARTs, one SPI master/slave, and one I2S slave - enable host communication and digital sensor interfacing without external level shifters. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Δ-Σ ADC with PGA | Two independent 12-channel modulators with 1×–128× programmable gain - eliminates external signal conditioning for pressure, temperature, and flow sensors. |
| Floating-point conversion | On-the-fly integer-to-single-precision float conversion in ADC data path - reduces firmware overhead for sensor linearization and unit scaling. |
| ECC memory protection | SEC-DED error correction across 384KB flash, 160KB SRAM, and 16KB cache - prevents silent data corruption in long-life industrial deployments. |
| Ultra-low-power BACKUP mode | 2.84μA current with full 160KB SRAM retention at 3.3V - preserves calibration coefficients, device state, and security keys during main power loss. |
| Hardware security engine | Dedicated AES-128/192/256 accelerator + SP800-90B TRNG + secure NV key storage - enables encrypted firmware updates and device identity attestation. |
Applications
| 4–20mA Loop-Powered Transmitter | Industrial Pressure Sensor |
|---|---|
Use Scenario: Compact, self-powered transmitter converting analog pressure sensor output into standardized 4–20mA current loop signal for PLC/DCS interfaces. IC Role / Device Role / Timing Role: Primary system-on-chip performing sensor excitation, precision Δ-Σ digitization, digital compensation, and DAC-driven current loop control. Use Value: Eliminates external ADC, DAC, and microcontroller - reduces BOM count by ≥7 components and PCB area by >35% versus discrete solutions. |
Use Scenario: High-accuracy pressure measurement in oil & gas wellhead monitoring, where long-term stability and wide temperature range are critical. IC Role / Device Role / Timing Role: Precision analog acquisition engine with on-die temperature compensation and ECC-protected calibration storage. Use Value: Achieves <±0.1%FS total error over −40°C to +105°C using factory-trimmed PGA and internal reference, reducing post-calibration labor. |
| Medical Flow Sensor Module | Smart Temperature Transmitter |
Use Scenario: Disposable or reusable respiratory flow sensor in ventilators, requiring low-power operation and medical-grade data integrity. IC Role / Device Role / Timing Role: Real-time flow computation unit with secure boot, encrypted data logging, and fail-safe diagnostics. Use Value: Meets IEC 62304 Class B software safety requirements via hardware-enforced memory protection and deterministic interrupt latency. |
Use Scenario: DIN-rail mounted temperature transmitter for HVAC or process control, converting RTD/thermistor signals to 4–20mA or digital Modbus output. IC Role / Device Role / Timing Role: Dual-role analog front-end and protocol stack processor - handles sensor linearization, cold-junction compensation, and UART-based Modbus RTU framing. Use Value: Integrates 24-bit Δ-Σ ADC, 12-bit DAC, and dual UARTs - enables single-chip Modbus slave implementation without external transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power mixed-signal MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADuCM4050BCPZ | Arm Cortex-M4F @ 52MHz, 512KB flash, 64KB SRAM, single 16-bit SAR ADC (no Δ-Σ), no integrated DAC | Better suited for lower-resolution, higher-speed control loops; lacks precision AFE for strain gauge or thermocouple inputs | Select when cost-sensitive designs prioritize flash size over analog precision and require only basic ADC functionality. |
| STM32L562VE | Arm Cortex-M33 @ 110MHz, 512KB flash, 256KB SRAM, 12-bit SAR ADC (5Msps), no PGA or Δ-Σ architecture | Optimized for general-purpose ultra-low-power control; lacks on-chip temperature sensor and ECC-protected SRAM | Choose for applications needing cryptographic acceleration (AES/SHA) and TrustZone but not high-precision sensor digitization. |
Compared with ADuCM4050BCPZ and STM32L562VE, the MAX32675ATK+ uniquely combines dual high-resolution Δ-Σ ADCs with PGA, ECC-protected memory, and sub-3μA BACKUP mode - making it the only option capable of replacing discrete AFE + MCU in certified 4–20mA loop transmitters.
Availability
The MAX32675ATK+ is available at Aetrix Electronics and suitable for industrial pressure transmitters, medical flow sensors, and smart temperature transmitters requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant manufacturing.
Supply support for MAX32675ATK+ 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
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX32675ATK+ belongs to the MAX326xx family of ultra-low-power microcontrollers engineered specifically for battery- and loop-powered industrial and medical sensors - emphasizing precision analog integration, functional safety, and energy efficiency over raw compute throughput.
FAQ
What is the operating temperature range of the MAX32675ATK+?
The MAX32675ATK+ is rated for continuous operation from −40°C to +105°C ambient temperature. This specification is fully tested and guaranteed per the datasheet's Absolute Maximum Ratings and Electrical Characteristics tables, making it suitable for deployment in industrial enclosures, outdoor instrumentation, and medical equipment without thermal derating.
Does the MAX32675ATK+ support secure boot with hardware root of trust?
Yes, the MAX32675ATK+ implements a secure bootloader with hardware-enforced chain-of-trust. It verifies firmware signature using AES-256 before execution, stores cryptographic keys in tamper-resistant nonvolatile memory, and enforces secure boot policy via immutable ROM code - all confirmed in the "Security" section of the MAX32675 datasheet Rev 1.
How many analog input channels does the MAX32675ATK+ support, and how are they allocated?
The MAX32675ATK+ supports 12 analog input channels (AIN0–AIN11), assignable to either of its two independent Δ-Σ ADCs. Each ADC has its own PGA, reference mux, and conversion ready signal - enabling concurrent high-precision acquisition of multiple sensor types (e.g., pressure + temperature) with independent gain and filtering settings.
What package type and pin count does the MAX32675ATK+ use?
The MAX32675ATK+ uses a 68-pin Thin Quad Flat No-lead (TQFN) package with 0.4mm pitch and exposed thermal pad (package code T6888MK+2, outline 21-0510). This compact, thermally efficient package is optimized for space-constrained industrial sensor modules and supports automated optical inspection (AOI) and reflow soldering per JEDEC J-STD-020.
Can the MAX32675ATK+ operate from a single 3.3V supply, or does it require separate analog/digital rails?
The MAX32675ATK+ supports both single-supply and multi-supply operation. In single-supply mode, VDDIO and VDDA must be externally connected to the same 2.7–3.63V rail. VCORE is internally regulated (0.9V/1.0V/1.1V), so only one external supply is required - simplifying power design for loop-powered 4–20mA transmitters.
MAX32675ATK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 68-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4F
- Core Size:
- 32-Bit Single-Core
- Speed:
- 100MHz
- Connectivity:
- 4-Wire, I2C, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 23
- Program Memory Size:
- 384KB (384K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 160K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.63V
- Data Converters:
- A/D 24x16b, 24x24b Sigma-Delta; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MAX32675ATK+ FAQ
1.How can I place an order for MAX32675ATK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX32675ATK+ 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 MAX32675ATK+ reliable?
The price and inventory of MAX32675ATK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX32675ATK+ is usually 5 days.
3.What payment methods are accepted for MAX32675ATK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX32675ATK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX32675ATK+?
MAX32675ATK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX32675ATK+ 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 MAX32675ATK+?
For technical support, including MAX32675ATK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX32675ATK+ requirements.
6.How does Aetrix verify that MAX32675ATK+ is sourced from the original manufacturer or authorized distributors?
All MAX32675ATK+ 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 MAX32675ATK+ meets industry standards.
7.What is the process for return or replacement of MAX32675ATK+?
All MAX32675ATK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX32675ATK+, 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 MAX32675ATK+ part is unused and in its original packaging.
Return procedure for MAX32675ATK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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