Grįžti į Analog Devices Inc.

Analog Devices / Maxim Integrated MAX86176 PPG and ECG Analog Front-End (AFE)

Analog Devices MAX86176 PPG and ECG Analog Front-End (AFE) is a complete photoplethysmogram (PPG) and electrocardiogram (ECG) solution for wearable applications. The ECG channel of the MAX86176 features EMI filtering, internal lead biasing, AC and DC lead-off detection, right-leg drive, ultra-low power DC lead-on detection during standby mode, and extensive calibration voltages for built-in self-test. The PPG data acquisition system supports up to 6 LEDs and 4 photodiode inputs, which are fully synchronized with the ECG signal path. The MAX86176 can operate with either an internal or external clock. The device is designed to meet IEC 60601-2-47 Ambulatory ECG Systems monitoring compliance for even the most challenging dry electrode applications.

Analog Devices MAX86176 Analog Front-End is available in a 36-bump, 0.4mm pitch, 2.73mm x 2.71mm wafer-level package (WLP).

Features

  • System
    • 0.5μA shutdown current
    • 256-word FIFO for ECG and PPG
    • True synchronous ECG and PPG data from dedicated signal paths
    • Two fully configurable interrupts
    • High-speed SPI interface or I2C interface
    • LED driver with 128mA LED maximum current
    • -40°C to +85°C operating temperature range
    • 2.728mm x 2.708mm thin WLP36 package; 0.4mm pitch
  • Photoplethysmogram (PPG)
    • Complete dual-channel optical data acquisition system
    • Ultra-low-power operation for wearable devices
      • Optical readout channel <11μA at 25fps
      • 14.6μs to 117.1μs ADC integration time
      • Low shutdown current <1μA (typical)
    • Signal to Noise Ratio (SNR) up to 110dB with average mode and off-chip filtering
    • Supports frame rates from 1fps to 2kfps
    • High-resolution 20-bit charge-integrating ADCs
    • Low dark-current noise of < 50pARMS
    • Excellent ambient range and rejection capability
      • > 100μA ambient photodiode current
      • > 90dB ambient rejection at 120Hz
  • Electrocardiogram (ECG)
    • Clinical-grade ECG AFE with high-resolution ADC
      • 15.6 ENOB with 0.6μVRMS noise over 0.05Hz to 40Hz
    • Very low input bias current 
      • 233fARMS input-current noise (0.05Hz to 40Hz, TA = +25°C)
    • Fully differential input structure with Common-Mode Rejection Ratio (CMRR) > 110dB at power-line frequencies
    • High-input impedance > 1GΩ for extremely low common to differential-mode conversion
    • High DC-offset range of ±1300mV (1.8V typical) allows a wide variety of electrodes to be used
    • High AC-dynamic range of > 90mVP-P helps prevent saturation in the presence of motion
    • ECG biopotential channel can be used for some EEG applications
      • Higher-gain ranges available (480V/V, 960V/V)
      • Low input-referred voltage and current noise enables the use of small-area dry electrodes

Applications

  • Wearable devices for fitness, wellness, and medical applications with clinical accuracy
  • Suitable for wrist, finger, ear, and other locations
  • Optimized performance to detect heart rate, oxygen saturation (SpO2), muscle and tissue oxygen saturation (SmO2 and StO2), and body hydration
  • Single-lead event monitors for atrial fibrillation (AFib) and other arrhythmia detection
  • Single-lead wireless patches for at-home and in-hospital monitoring
  • Chest-band heart-rate monitors for fitness applications
  • Biometric authentication and ECG-on-demand applications
  • Fully synchronized PPG and ECG signal path for PTT measurements

Videos

Sub-System Block Diagram

Block Diagram - Analog Devices / Maxim Integrated MAX86176 PPG and ECG Analog Front-End (AFE)

Package Outline

Mechanical Drawing - Analog Devices / Maxim Integrated MAX86176 PPG and ECG Analog Front-End (AFE)
Paskelbta: 2021-07-26 | Atnaujinta: 2023-04-18