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Ultra-Low Power, Single-Channel Integrated Biopotential HR Detection AFE

Ultra-Low Power, Single Channel Integrated Biopotential HR Detection AFE

Product Details

Key Features

Applications/Uses

Parametric specs for Bio-Sensors
Integrated LEDs R-R Detection
ISUPPLY (µA) (typ) 100
Shutdown Mode Supply Current (µA) (typ) 0.42
VSUPPLY (V) (min) 1.1
VSUPPLY (V) (max) 2
Resolution (bits) (ADC) 18
Oper. Temp. (°C) 0 to +70
Package/Pins WLP/30
Budgetary
Price (See Notes)
3.39
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Simplified Block Diagram

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Parameters

Parametric specs for Bio-Sensors
Integrated LEDs R-R Detection
ISUPPLY (µA) (typ) 100
Shutdown Mode Supply Current (µA) (typ) 0.42
VSUPPLY (V) (min) 1.1
VSUPPLY (V) (max) 2
Resolution (bits) (ADC) 18
Oper. Temp. (°C) 0 to +70
Package/Pins WLP/30
Budgetary
Price (See Notes)
3.39

Key Features

  • Heart Rate Detection with Interrupt Feature Eliminates the Need to Extract and Process the ECG Data on the Microcontroller
    • Robust R-R Detection in High Motion Environment at Extremely Low Power
  • Clinical-Grade Biopotential 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 Keeps µC in Deep Sleep Mode with RTC Off Until Valid Lead Condition is Detected
    • Lead-On Detect Current: 0.7µA (typ)
  • Configurable Interrupts Allows the µC Wake-Up Only on Every Heart Beat Reducing the Overall System Power
  • High-Speed SPI Interface
  • Shutdown Current of 0.5µA (typ)

Applications/Uses

  • Chest Band Heart Rate Monitors for Fitness Applications
  • Single Lead Wireless Patches for At-Home/In-Hospital Monitoring

Description

The MAX30004 is a complete, biopotential, HR detection analog front-end solution for wearable applications, especially for chest straps and patches. It offers high performance for clinical and fitness applications, with ultra-low power for long battery life. The MAX30004 is a single biopotential channel providing R-R intervals for 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 MAX30004 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.

Simplified Block Diagram

MAX30004: Functional Diagram MAX30004: Functional Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .