CJMCU-30003 MAX30003 ECG AFE Single-Channel Biopotential Module

CJMCU-30003 MAX30003 Single-Channel Biopotential AFE ECG Module

The CJMCU-30003 is a compact, high-performance development module built around the MAX30003 single-channel biopotential analog front-end (AFE) integrated circuit. Designed for engineers, researchers, and hobbyists working on wearable electronics, biosignal acquisition systems, and ECG (electrocardiogram) prototyping, this board delivers accurate cardiac electrical signal capture with integrated R-R interval detection — all in a small, breadboard-friendly footprint.

Key Features

• MAX30003 AFE IC: Industry-leading single-channel biopotential analog front-end optimized for ECG signal acquisition and R-R interval measurement.
• R-R Detection: Onboard hardware R-R interval detection enables real-time heart rate calculation without extensive external processing.
• Ultra-Low Power Operation: Ideal for battery-powered wearable and portable biosignal acquisition designs.
• SPI Interface: Simple 4-wire SPI communication for easy integration with microcontrollers such as Arduino, STM32, ESP32, and Raspberry Pi.
• Integrated Lead Detection: Onboard electrode lead-on/lead-off detection circuitry for robust system-level design.
• High Common-Mode Rejection: Effectively filters out interference for clean, accurate biopotential signal capture.
• Compact PCB Design: Small form factor makes it perfect for space-constrained wearable prototypes and development boards.
• Wide Supply Voltage Range: Compatible with standard 3.3V and 5V development platforms.

Specifications

• IC: Maxim MAX30003
• Channels: 1 (Single-Channel Biopotential)
• Communication Interface: SPI
• Application: ECG Acquisition, R-R Interval Detection, Biopotential Signal Measurement
• Brand: GUANDO
• Made in Mainland China

What's in the Box

• 1× CJMCU-30003 MAX30003 ECG AFE Module

Who Is This For?

This module is ideal for electronics engineers, embedded systems developers, biomedical engineering students, and makers who need a reliable, easy-to-use biopotential acquisition front-end for ECG signal processing projects, wearable health monitoring prototypes, or academic research into cardiac biosignals.

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Frequently Asked Questions

Q: What microcontrollers are compatible with the CJMCU-30003 MAX30003 ECG AFE module?

A: The CJMCU-30003 uses a standard 4-wire SPI interface, making it compatible with a wide range of microcontrollers including Arduino (Uno, Mega, Nano), STM32, ESP32, ESP8266, Raspberry Pi, and most other development boards that support SPI communication.

Q: What is R-R detection and why is it important in an ECG AFE module?

A: R-R interval detection refers to the measurement of the time between successive R-peaks in an ECG waveform — the sharp, tall peaks corresponding to ventricular contraction. The MAX30003 performs this detection in hardware, allowing the host microcontroller to calculate heart rate and heart rate variability (HRV) with minimal processing overhead, which is especially valuable in low-power wearable applications.

Q: Does the CJMCU-30003 module require external electrodes?

A: Yes. To capture ECG biopotential signals, you will need standard surface electrodes (such as disposable Ag/AgCl snap or gel electrodes) connected to the module's electrode input pins. The module itself includes lead detection circuitry to indicate when electrodes are properly connected.

Q: What supply voltage does the CJMCU-30003 MAX30003 module require?

A: The module is designed to operate at 3.3V, which is the standard operating voltage for the MAX30003 IC. Many boards also include level-shifting or regulation circuitry to allow use with 5V systems — refer to the module's schematic or datasheet for your specific revision.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.