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Analog Devices Inc./Maxim Integrated MAX32675CALZ+T
- Part No.:
- MAX32675CALZ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Microcontrollers
- Package:
- 72-VFLGA Exposed Pad
- Datasheet:
-
MAX32675CALZ+T.pdf
- Description:
- IC MCU 12BIT 384KB FLASH 68TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,184
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Product details
Overview
The MAX32675CALZ+T from Analog Devices is an ultra-low-power Arm® Cortex®-M4F microcontroller with integrated HART modem, dual 12-channel Δ-Σ ADCs (16-/24-bit), 12-bit DAC, and ECC-protected 384KB flash/160KB SRAM. It delivers ≤2.1mA ACTIVE current at +85°C and supports 4–20mA loop-powered industrial sensors and transmitters.
For engineers reviewing the MAX32675CALZ+T datasheet, MAX32675CALZ+T pinout, MAX32675CALZ+T application, or MAX32675CALZ+T equivalent, key selection criteria include HART modem integration, dual precision ADCs with PGA (1×–128×), low-power operation down to 375μA in BACKUP mode, SEC-DED ECC coverage across memory, and -40°C to +105°C industrial temperature rating.
Technical Context
The MAX32675CALZ+T implements a full-featured Arm Cortex-M4F core running at 12MHz with hardware FPU and NVIC, coupled with a dedicated analog front-end featuring two independent Δ-Σ modulators, programmable gain amplifiers, and internal voltage reference options (1.024V, 1.5V, 2.048V, 2.5V). Its clocking architecture includes four oscillators: IBRO (7.3728MHz), INRO (115kHz), ERFO (16MHz crystal), and IPO (12MHz).
Power management supports five operational modes-ACTIVE, SLEEP, DEEPSLEEP, BACKUP, and STORAGE-with measured fixed currents of 875μA (ACTIVE idle), 840μA (SLEEP), 425μA (DEEPSLEEP), and 375μA (BACKUP with full SRAM retention). The HART modem operates over the 4–20mA loop using FSK signaling compliant with HART Physical Layer Specification (IEC 61000-4-4, IEC 61000-4-5).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4F with FPU, 12MHz max system clock - enables real-time sensor fusion and floating-point math for calibration and linearization. |
| Memory | 384KB flash (376KB user), 160KB SRAM (128KB with ECC) - supports secure firmware storage and large sensor data buffers with error correction. |
| ADC Performance | Dual 12-channel Δ-Σ ADCs, 24-bit @ 0.4ksps or 12-bit @ higher rates - provides high-resolution, low-noise measurement of pressure, temperature, and flow signals. |
| HART Modem | Integrated digital HART modem with FSK_IN/FSK_OUT, HART_REF, HART_RTS - eliminates external modem IC and reduces BOM for 4–20mA smart transmitters. |
| Power Consumption | 375μA in BACKUP mode with full 160KB SRAM retention - enables long-term data logging during main power loss without external backup. |
| Operating Range | -40°C to +105°C ambient, 2.7V–3.63V supply - qualified for harsh industrial and medical environments including process control cabinets and portable diagnostics. |
| Security | AES-128/192/256 engine, persistent key storage, ROM bootloader, 32-bit CRC accelerator - supports secure boot, encrypted firmware updates, and tamper-resistant configuration. |
Pinout & Package
MAX32675CALZ+T is housed in a 72-pin LGA package (7mm × 7mm, 0.4mm pitch), marked "L7288M+1", with thermal resistance θJA = 33.59°C/W on a four-layer board. Pin 1 is marked by a dot on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDIO / VDDA | Digital & analog supply rails | Must be tied together at 2.7–3.63V; powers all logic, AFE, and HART circuitry with shared regulation path. |
| AIN[0–11] | Analog input channels | 12 assignable inputs per ADC; support differential or single-ended sensing with PGA gain up to 128× before conversion. |
| ADC0_RDY / ADC1_RDY | Conversion ready flags | Open-drain outputs indicating end-of-conversion; used to trigger DMA or interrupt-driven data reads without polling. |
| FSK_IN / FSK_OUT | HART physical layer interface | Direct connection to current-loop transformer; FSK_IN receives HART signal, FSK_OUT drives modulation onto loop. |
| HART_REF | HART reference voltage | Provides stable 1.25V bias for HART receiver circuitry; requires 10nF decoupling to VSSA. |
| RSTN | Active-low reset input | Asynchronous reset pin with internal pull-up; assertion time ≥6× system clock period required for reliable reset entry. |
| SPI/I²C/UART pins | Serial peripheral interfaces | Up to 2× SPI, 3× I²C, 3× UART (including LPUART); multiplexed on GPIOs with flexible AF configuration via register control. |
Key Features
| Feature | Design Value |
|---|---|
| SEC-DED ECC on Flash/SRAM/Cache | Ensures bit-error resilience in mission-critical industrial applications; corrects single-bit errors and detects double-bit faults across entire memory subsystem. |
| Dual Independent Δ-Σ ADCs | Each supports 12 external channels, selectable resolution (16/24-bit), and on-the-fly integer-to-float conversion - simplifies sensor signal chain and avoids external DSP. |
| Integrated HART Modem | Meets HART Physical Layer spec without external components; reduces bill-of-materials and PCB area versus discrete modem solutions. |
| Low-Power Operation Modes | BACKUP mode draws only 375μA while retaining full 160KB SRAM - enables seamless state recovery after brownout or maintenance interruption. |
| Hardware Security Accelerators | AES engine + persistent key storage + ROM bootloader - enables secure firmware authentication and encrypted communication for IIoT edge nodes. |
Applications
| 4–20mA Smart Transmitter | Industrial Pressure Sensor |
|---|---|
Use Scenario: Loop-powered field transmitter converting analog sensor output to digital HART data for remote configuration and diagnostics. IC Role / Device Role / Timing Role: Primary controller and HART physical layer interface; manages ADC sampling, digital signal processing, and FSK modulation/demodulation. Use Value: Eliminates need for separate MCU + HART modem + precision ADC, reducing component count and enabling compact, certified loop-powered designs. | Use Scenario: High-accuracy pressure measurement in oil & gas pipeline monitoring systems requiring long-term stability and EMC robustness. IC Role / Device Role / Timing Role: Precision analog front-end with PGA and 24-bit Δ-Σ ADC; performs cold-junction compensation and linearization in real time. Use Value: Achieves <±0.05% FS accuracy over -40°C to +105°C using on-chip reference and ECC-protected calibration coefficients stored in flash. |
| Medical Flow Sensor | Temperature Transmitter |
Use Scenario: Portable infusion pump with real-time fluid flow monitoring and alarm generation based on calibrated differential pressure. IC Role / Device Role / Timing Role: Dual ADC acquisition engine with simultaneous sampling; computes flow rate via Bernoulli equation using onboard FPU. Use Value: Enables battery-operated medical devices to achieve >100 hours runtime with 24-bit resolution and sub-millisecond latency. | Use Scenario: DIN-rail mounted RTD/thermocouple transmitter feeding data to PLC via 4–20mA loop with HART diagnostics. IC Role / Device Role / Timing Role: System-on-chip integrating excitation current sources, cold-junction compensation, linearization, and HART communication. Use Value: Reduces external component count by >15 parts versus discrete solutions while maintaining IEC 61000-4-x immunity compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar mixed-signal microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADuCM4050BCPZ-RL7 | Arm Cortex-M4F @ 52MHz, 512KB flash, 128KB SRAM, no integrated HART modem, single 16-bit SAR ADC | Lacks native HART support; requires external modem IC and additional signal conditioning for 4–20mA loop use | Preferred when higher CPU performance and larger code space are needed, but HART integration is not required. |
| STM32L562VET6 | Arm Cortex-M33 @ 110MHz, 512KB flash, 256KB SRAM, AES-256, no integrated HART or precision Δ-Σ ADC | No analog front-end optimized for sensor measurement; lacks PGA, internal reference, and HART PHY | Suitable for secure, high-performance IoT nodes where analog sensing is handled externally or via add-on AFE. |
Compared with ADuCM4050BCPZ-RL7 and STM32L562VET6, the MAX32675CALZ+T uniquely integrates HART modem, dual Δ-Σ ADCs with PGA, and ECC-protected memory in a single chip - delivering lowest BOM cost and smallest footprint for certified 4–20mA smart sensor designs.
Availability
MAX32675CALZ+T is available at Aetrix Electronics and suitable for 4–20mA loop-powered sensors, industrial pressure/temperature transmitters, and medical flow monitoring systems requiring stable component supply, long-term lifecycle support, and extended temperature qualification.
Supply support for MAX32675CALZ+T 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 technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX32675 product line is designed specifically for ultra-low-power, high-precision industrial and medical sensor signal conditioning and smart transmitter applications - combining Arm-based processing with integrated analog and HART connectivity.
FAQ
What is the maximum operating temperature for the MAX32675CALZ+T?
The MAX32675CALZ+T is rated for continuous operation from -40°C to +105°C ambient temperature, making it suitable for deployment inside industrial control cabinets, outdoor process instrumentation, and medical diagnostic equipment where thermal margins are constrained. This rating is validated across all electrical specifications including flash endurance, ADC accuracy, and HART modem timing compliance.
Does the MAX32675CALZ+T include hardware support for HART communication?
Yes, the MAX32675CALZ+T integrates a fully compliant HART physical layer modem with dedicated pins (FSK_IN, FSK_OUT, HART_REF, HART_RTS) and internal signal conditioning. It meets IEC 61000-4-4 and IEC 61000-4-5 immunity requirements and requires no external modem IC - significantly reducing design complexity and PCB area for 4–20mA smart transmitters.
How much SRAM is available with ECC enabled on the MAX32675CALZ+T?
When ECC is enabled on the MAX32675CALZ+T, 128KB of the total 160KB SRAM is available for application use. The remaining 32KB is reserved for ECC parity bits and internal cache structures. This configuration ensures SEC-DED protection across all user-accessible SRAM while maintaining deterministic real-time behavior for critical sensor tasks.
Can the MAX32675CALZ+T operate in BACKUP mode with full SRAM retention?
Yes, the MAX32675CALZ+T supports full 160KB SRAM retention in BACKUP mode at a typical current draw of 375μA (VDDIO = VDDA = 3.0V, HART modem biased). This allows complete application state preservation during main power interruption - essential for maintaining calibration data, fault logs, and configuration settings in safety-critical industrial systems.
What oscillator options are available for the MAX32675CALZ+T system clock?
The MAX32675CALZ+T provides four internal/external clock sources: IBRO (7.3728MHz), INRO (115kHz), ERFO (16MHz crystal), and IPO (12MHz). The system clock can be derived from any of these, with automatic failover and dynamic switching supported via register control - enabling precise timing for ADC sampling, UART baud generation, and HART symbol timing without external clock components.
MAX32675CALZ+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 72-VFLGA Exposed Pad
- Series:
- DARWIN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M4F
- Core Size:
- 32-Bit
- Speed:
- 120MHz
- Connectivity:
- 4-Wire, I2C, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 36
- Program Memory Size:
- 384KB (384K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 160K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 3.63V
- Data Converters:
- A/D 12x16/24b Sigma-Delta; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MAX32675CALZ+T FAQ
1.How can I place an order for MAX32675CALZ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX32675CALZ+T 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 MAX32675CALZ+T reliable?
The price and inventory of MAX32675CALZ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX32675CALZ+T is usually 5 days.
3.What payment methods are accepted for MAX32675CALZ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX32675CALZ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX32675CALZ+T?
MAX32675CALZ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX32675CALZ+T 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 MAX32675CALZ+T?
For technical support, including MAX32675CALZ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX32675CALZ+T requirements.
6.How does Aetrix verify that MAX32675CALZ+T is sourced from the original manufacturer or authorized distributors?
All MAX32675CALZ+T 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 MAX32675CALZ+T meets industry standards.
7.What is the process for return or replacement of MAX32675CALZ+T?
All MAX32675CALZ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX32675CALZ+T, 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 MAX32675CALZ+T part is unused and in its original packaging.
Return procedure for MAX32675CALZ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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