返回Analog Devices Inc.

Analog Devices / Maxim Integrated MAX30004集成生物电势HR检测AFE

Maxim MAX30004集成生物电势HR检测AFE是用于可穿戴应用的完备、生物电势、HR检测模拟前端 (AFE) 解决方案，特别适用于胸带和胸贴。 它为临床和健身应用提供出色性能，具有超低功耗和较长电池寿命。 MAX30004是一款提供心率监测R-R间歇的单通道生物电势模拟前端。 生物电势通道具有ESD保护、EMI滤波、内部导联偏置、直流导联关断检测。 它还包括待机模式下的超低功耗导联导通检测以及用于内部自检的齐全校准电压。 软启动顺序确保没有较大的瞬态电流注入到电极中。 生物电势通道还具有高输入阻抗、低噪声、高CMRR、可编程增益、各种低通和高通滤波器选项、以及高分辨率模数转换器。 生物电势通道为直流耦合，可应对较大的电极电压偏置。 该通道还具有快速恢复模式，可从过驱动条件下快速恢复，例如除颤和电外科手术。

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 and can handle large electrode voltage offsets. This channel also has a fast recovery mode to quickly recover from overdrive conditions, such as defibrillation and electrosurgery.

特性

  • 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 a 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)

应用

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

Functional Diagram

Analog Devices / Maxim Integrated MAX30004集成生物电势HR检测AFE
发布日期: 2017-06-21 | 更新日期: 2023-04-17