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Maxim Integrated MAX30003

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Maxim MAX30003: ultra-low power, single-channel integrated biopotential ECG AFE

The MAX30003 is a complete, biopotential, analog front-end solution for wearable applications. It offers high performance for clinical and fitness applications, with ultra-low power for long battery life. The MAX30003 is a single biopotential channel providing ECG waveforms and heart rate detection.

The biopotential channel has ESD protection, EMI filtering, internal lead biasing, DC leads-off detection, ultra-low power leads-on detection during standby mode, and extensive calibration voltages for built-in self-test. Soft power-up sequencing ensures no large transients are injected into the electrodes. The biopotential channel also has high input impedance, low noise, high CMRR, programmable gain, various low-pass and high-pass filter options, and a high-resolution analog-to-digital converter. The biopotential channel is DC coupled, can handle large electrode voltage offsets, and has a fast recovery mode to quickly recover from overdrive conditions, such as defibrillation and electrosurgery.

The MAX30003 is available in a 28-pin TQFN and 30-bump wafer-level package (WLP), operating over the 0°C to +70°C commercial temperature range.

Key features

  • Clinical-Grade ECG AFE with High-Resolution Data Converter
    • 15.5 Bits Effective Resolution with 5µVP-P Noise
  • Better Dry Starts Due to Much Improved Real World CMRR and High Input Impedance
    • Fully Differential Input Structure with CMRR > 100dB
  • Offers Better Common-Mode to Differential Mode Conversion Due to High Input Impedance
    • High Input Impedance > 500MΩ for Extremely Low Common-to-Differential Mode Conversion
  • Minimum Signal Attenuation at the Input During Dry Start Due to High Electrode Impedance
  • High DC Offset Range of ±650mV (1.8V, typ) Allows to Be Used with Wide Variety of Electrodes
  • High AC Dynamic Range of 65mVP-P Will Help the AFE Not Saturate in the Presence of Motion/Direct Electrode Hits
  • Longer Battery Life Compared to Competing Solutions
    • 85µW at 1.1V Supply Voltage
  • Leads-On Interrupt Feature Allows to Keep µC in Deep Sleep Mode with RTC Off Until Valid Lead Condition is Detected
    • Lead-On Detect Current: 0.7µA (typ)
  • Built-In Heart Rate Detection with Interrupt Feature Eliminates the Need to Run HR Algorithm on the μController
    • Robust R-R Detection in High Motion Environment at Extremely Low Power
  • Configurable Interrupts Allows the µC Wake Up Only on Every Heart Beat Reducing the Overall System Power
  • High Accuracy Allows for More Physiological Data Extractions
  • 32-Word FIFO Allows You to Wake Up µController Every 256ms with Full ECG Acquisition
  • High-Speed SPI Interface
  • Shutdown Current of 0.5µA (typ)
     

Applications

  • Bio Authentication and ECG-On-Demand Applications
  • Chest Band Heart Rate Monitors for Fitness Applications
  • Single Lead Event Monitors for Arrhythmia Detection
  • Single Lead Wireless Patches for At-Home/In-Hospital Monitoring
     

Block diagram

Maxim Integrated MAX30003 block diagram

Functional diagram

Maxim Integrated MAX30003 application diagram

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