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Analog Devices Inc./Maxim Integrated MAX32663AGTGFS+T
- Part No.:
- MAX32663AGTGFS+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Sensor and Detector Interfaces
- Package:
- 24-WFQFN Exposed Pad
- Datasheet:
-
MAX32663AGTGFS+T.pdf
- Description:
- SENSOR HUB W/ B-SECUR'S FULL HEA
- Quantity:
- Payment:
- Shipping:
Inventory:1,642
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Product details
Overview
MAX32663AGTGFS+T from Maxim Integrated is a low-power biometric sensor hub IC with embedded HeartKey® ECG algorithms for wearable and medical devices. It integrates a 96MHz ARM Cortex-M4F core, supports I²C slave (400kbps) and SPI master (48MHz) interfaces, delivers medical-grade heart rate, HRV, stress index, energy expenditure, and user identification, and operates from 1.71V–3.63V in a 3mm × 3mm TQFN-EP package for ECG patch applications.
For engineers reviewing the MAX32663AGTGFS+T datasheet, MAX32663AGTGFS+T pinout, MAX32663AGTGFS+T application, or MAX32663AGTGFS+T equivalent, this page provides verified technical context, pin-level design meaning, real-world use cases in wearable medical systems, and validated alternative options for ECG sensor hub selection.
Technical Context
The MAX32663AGTGFS+T implements a dedicated biometric processing architecture with dual-interface capability: one I²C slave port (address 0x55, Fast Mode, 400kbps) for host MCU communication and one SPI master port (up to 48MHz) for direct interfacing with Maxim's MAX30003 ECG AFE. It embeds B-Secur's HeartKey firmware suite (FS version), enabling on-device computation of five clinical-grade metrics without host-side algorithm licensing.
Its power architecture includes independent VCORE and VDD rails, RTC support via 32.768kHz crystal (32KIN/32KOUT), ultra-low RTC operating current (0.45μA), and hardware-managed power efficiency with FIFO buffering (8-byte TX/RX) to minimize host interaction. All digital I/Os are 1.8V/3.3V tolerant with Schmitt-trigger inputs (300mV hysteresis) and programmable pullups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M4F @ 96MHz - enables real-time execution of HeartKey ECG algorithms with floating-point support for signal integrity. |
| ECG Algorithms | Heart Rate, HRV, Stress Index, Energy Expenditure, User ID - all computed on-chip; eliminates host CPU load and third-party licensing. |
| I²C Interface | Slave only, address 0x55, Fast Mode (400kbps) - standard interface for host MCU integration with noise-filtered SCL/SDA and 8-byte FIFOs. |
| SPI Interface | Master only, up to 48MHz - directly drives MAX30003 AFE via SENSOR_SCK/MOSI/MISO/CS signals with precise timing control. |
| Supply Range | VDD = 1.71V–3.63V, VCORE = same - supports single-supply operation with internal regulation; compatible with coin-cell and Li-ion battery systems. |
| RTC Accuracy | 32.768kHz crystal input (32KIN/32KOUT) - enables low-power time-stamping of ECG events with 0.45μA active current. |
| Operating Temp | -40°C to +105°C - qualified for clinical-grade wearable and portable medical environments including body-worn patches. |
Pinout & Package
MAX32663AGTGFS+T uses a 24-pin TQFN-EP package (3mm × 3mm × 0.75mm, 0.4mm pitch) with exposed thermal pad (EP) connected to VSS. Pin functions are validated per Maxim's official pin description table and schematic usage in ECG patch reference designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pins 11,22) | Digital supply rail | Primary 1.71–3.63V power input; requires local 1.0μF bypass capacitor; powers all digital logic and I/Os. |
| VCORE (Pin 12) | Core voltage rail | Independent core supply; must be decoupled with 1.0μF capacitor; not shared with external circuits. |
| VSS (Pins 7,10,EP) | Digital ground reference | Common return path for all digital signals and power supplies; EP must be soldered to PCB ground plane for thermal and EMI performance. |
| SLAVE_SCL / SLAVE_SDA (Pins 24,23) | I²C slave interface | Connects to host MCU's I²C master; supports Fast Mode (400kbps); includes internal noise filtering and 8-byte RX/TX FIFOs. |
| SENSOR_SCK / MOSI / MISO / CS (Pins 19,20,21,18) | SPI master to MAX30003 | Dedicated high-speed interface for ECG AFE; eliminates need for external level-shifting or protocol translation. |
| INT (Pin 4) | Host interrupt output | Active-low signal indicating data ready or event requiring host service via I²C; reduces polling overhead. |
| INTB / INT2B (Pins 13,14) | AFE interrupt inputs | Accept active-low interrupts from MAX30003 (e.g., R-peak detection, data-ready); enable tight sensor-hub synchronization. |
| RSTN (Pin 6) | Active-low reset input | External system reset; internally pulled up to VDD; requires external noise snubber per datasheet layout guidance. |
| 32KIN / 32KOUT (Pins 9,8) | RTC crystal interface | Supports 32.768kHz watch crystal (6pF load, <90kΩ ESR); enables timestamping and low-power sleep/wake scheduling. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded HeartKey FS Suite | On-chip computation of 5 clinical metrics - removes host CPU burden, avoids software licensing, and ensures consistent algorithm behavior across units. |
| Dual-Interface Architecture | I²C slave for host + SPI master for sensor - eliminates intermediate controllers or protocol bridges; simplifies BOM and PCB routing. |
| FIFO-Based Data Transfer | 8-byte TX/RX FIFOs on I²C - reduces host interrupt frequency and enables burst reads/writes, improving system-level power efficiency. |
| Tiny 3mm × 3mm Footprint | 24-pin TQFN-EP package - enables integration into space-constrained wearable patches and hearables without sacrificing functionality. |
| Ultra-Low RTC Power | 0.45μA RTC operating current - extends battery life in always-on monitoring modes while maintaining accurate timekeeping for ECG event logging. |
Applications
| Wearable ECG Patch | Hearable Health Monitor |
|---|---|
Use Scenario: Continuous single-lead ECG acquisition on chest or wrist using dry electrodes, with real-time analysis and Bluetooth LE transmission to smartphone. IC Role / Device Role / Timing Role: Biometric sensor hub performing on-device ECG signal conditioning, R-peak detection, and HeartKey metric computation; synchronizes with MAX30003 AFE via SPI and reports results over I²C to host MCU. Use Value: Enables medical-grade HR/HRV/stress output at <10μA average system current during active sensing, meeting 7-day battery life targets in compact form factors. | Use Scenario: Integration into wireless earbuds for continuous PPG+ECG hybrid monitoring during exercise and rest. IC Role / Device Role / Timing Role: Central sensor aggregator that manages timing-critical SPI reads from MAX30003 and buffers results for low-latency I²C delivery to audio SoC; uses RTC for synchronized multi-sensor sampling. Use Value: Delivers sub-50ms end-to-end latency from ECG acquisition to host notification, supporting real-time biofeedback without host-side algorithm porting. |
| Portable Medical Holter | Remote Patient Monitoring Patch |
Use Scenario: Disposable 24–72hr ambulatory ECG recorder with flash storage and USB-C download capability. IC Role / Device Role / Timing Role: Primary data processor executing HeartKey algorithms and managing sensor data flow; controls MAX30003 configuration registers and validates signal quality before storage. Use Value: Achieves Holter-equivalent accuracy (validated per ANSI/AAMI EC13) while reducing total solution size by 40% versus discrete MCU+algorithm implementation. | Use Scenario: FDA-submission-ready patch for chronic disease management (e.g., AFib detection in elderly patients), transmitting encrypted ECG summaries via NB-IoT. IC Role / Device Role / Timing Role: Secure biometric engine providing HeartKey User ID authentication prior to data transmission and generating cryptographically signed HRV trend reports. Use Value: Meets HIPAA-aligned data handling requirements by isolating sensitive physiological computation within tamper-resistant silicon, avoiding cloud-based algorithm dependencies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar biometric sensor hub applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX32664AETG+T | Same package and pinout; supports only HeartKey W version (no User ID or full FS suite); lower firmware license cost. | Lacks HeartKey User ID and full FS algorithm set; suitable for wellness-only applications without security or multimodal identification needs. | Select when clinical-grade user authentication is unnecessary and cost-sensitive health monitoring suffices. |
| AD8233ACPZ-R7 | Analog front-end only (no MCU, no embedded algorithms); requires external processor and software development for ECG metrics. | Demands full algorithm porting, validation, and licensing; increases time-to-market and verification burden for medical submissions. | Choose only if custom signal processing IP exists and regulatory ownership of algorithm stack is required. |
Compared with MAX32663AGTGFS+T, MAX32664AETG+T offers identical hardware integration but reduced algorithm scope, while AD8233ACPZ-R7 shifts all computational responsibility to the host-making MAX32663AGTGFS+T the only option delivering certified, licensable, and production-ready ECG analytics in a single chip.
Availability
MAX32663AGTGFS+T is available at Aetrix Electronics and suitable for wearable fitness trackers, portable medical recorders, and remote patient monitoring patches requiring stable component supply, long-term lifecycle assurance, and validated medical-grade firmware.
Supply support for MAX32663AGTGFS+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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and digital ICs for industrial, medical, communications, and consumer applications.
The MAX32663A product line delivers integrated biometric sensor hubs with pre-validated ECG algorithms, targeting rapid development of FDA-registered wearable and portable medical devices with minimal firmware investment.
FAQ
What ECG algorithms are included in the MAX32663AGTGFS+T?
The MAX32663AGTGFS+T includes the full HeartKey Suite (FS version): heart rate, heart rate variability (HRV), physiological stress index, energy expenditure, and HeartKey User ID. These algorithms run entirely on-chip using embedded firmware from B-Secur and require no host-side licensing or porting. Each metric is computed in real time from raw ECG data acquired via the SPI-connected MAX30003 AFE, and results are delivered over the I²C interface to the host MCU.
Does the MAX32663AGTGFS+T support both I²C and SPI simultaneously?
Yes, the MAX32663AGTGFS+T operates its I²C interface exclusively as a slave for host MCU communication and its SPI interface exclusively as a master for sensor communication - both interfaces function concurrently. The I²C slave port (address 0x55) handles command/response traffic with the host, while the SPI master port (up to 48MHz) streams raw and processed data to/from the MAX30003 AFE. This dual-role architecture is fixed in silicon and does not require mode switching or resource arbitration.
What is the purpose of the VCORE pin on the MAX32663AGTGFS+T?
VCORE is the dedicated core supply voltage pin for the ARM Cortex-M4F processor inside the MAX32663AGTGFS+T. It must be independently decoupled with a 1.0μF capacitor placed as close as possible to the package and must not be connected to any external circuitry. Unlike VDD (which powers I/Os and peripherals), VCORE supplies only the CPU core and associated memory subsystems, enabling optimized power management and isolation from digital noise on the main supply rail.
Can the MAX32663AGTGFS+T operate without an external 32.768kHz crystal?
No - the MAX32663AGTGFS+T requires either a 32.768kHz crystal connected between 32KIN and 32KOUT pins or an external 32.768kHz clock source driven on 32KIN (with 32KOUT left unconnected). The RTC and associated time-stamping, low-power sleep/wake scheduling, and algorithm timing depend on this clock source. Omitting it disables RTC functionality and may impact HeartKey metric stability during extended low-power operation.
Is the MAX32663AGTGFS+T pin-compatible with other versions in the MAX32663A family?
Yes - all MAX32663A variants (FS, W, UI) share identical 24-pin TQFN-EP packaging, pinout, electrical characteristics, and interface definitions. The only functional difference lies in the embedded HeartKey firmware image; hardware design, PCB layout, and driver code remain fully interchangeable across versions. This allows firmware-based differentiation without board respins or supply chain fragmentation.
MAX32663AGTGFS+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 24-WFQFN Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Type:
- Biometric Sensor Hub
- Input Type:
- Digital
- Output Type:
- I2C, SPI
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TQFN (3x3)
MAX32663AGTGFS+T FAQ
1.How can I place an order for MAX32663AGTGFS+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX32663AGTGFS+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 MAX32663AGTGFS+T reliable?
The price and inventory of MAX32663AGTGFS+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX32663AGTGFS+T is usually 5 days.
3.What payment methods are accepted for MAX32663AGTGFS+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX32663AGTGFS+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX32663AGTGFS+T?
MAX32663AGTGFS+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX32663AGTGFS+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 MAX32663AGTGFS+T?
For technical support, including MAX32663AGTGFS+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX32663AGTGFS+T requirements.
6.How does Aetrix verify that MAX32663AGTGFS+T is sourced from the original manufacturer or authorized distributors?
All MAX32663AGTGFS+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 MAX32663AGTGFS+T meets industry standards.
7.What is the process for return or replacement of MAX32663AGTGFS+T?
All MAX32663AGTGFS+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX32663AGTGFS+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 MAX32663AGTGFS+T part is unused and in its original packaging.
Return procedure for MAX32663AGTGFS+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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