SBAS832B May   2017  – July 2019 AFE4410

PRODUCTION DATA.  

  1. 1Features
  2. 2Applications
  3. 3Description
    1.     Simplified Block Diagram
  4. 4Revision History
  5. 5Device and Documentation Support
    1. 5.1 Receiving Notification of Documentation Updates
    2. 5.2 Community Resources
    3. 5.3 Trademarks
    4. 5.4 Electrostatic Discharge Caution
    5. 5.5 Glossary
  6. 6Mechanical, Packaging, and Orderable Information

Features

  • Accurate, Continuous Heart-Rate Monitoring:
    • Up to 100-dB Dynamic Range for Accurate Heart-Rate Detection
    • Low Current for Continuous Operation on a Wearable Device With a Typical Value:
      • 30 µA for an LED, 25 µA for the Receiver
  • Transmitter:
    • 4 LEDs in Common Anode Configurations
    • 8-Bit Programmable LED Current to 200 mA
    • Mode to Fire Two LEDs in Parallel
    • Programmable LED On-Time
    • Simultaneous Support of 3 LEDs for Optimized SpO2, HRM, or Multiwavelength HRM
    • Average Current of 30 µA Adequate for a Typical Heart-Rate Monitoring Scenario:
      • 20-mA Setting, 60-µs Pulse Duration,
        25-Hz Sampling Rate
  • Receiver:
    • Supports 3 Time-Multiplexed PD Inputs
    • 24-Bit Representation of Current Input From PD in Two's-Complement Format
    • Individual DC Offset Subtraction DAC
      (Up to ±127-µA Range) at TIA Input for Each LED, Ambient
    • Digital Ambient Subtraction at ADC Output
    • Transimpedance Gain: 10 kΩ to 2 MΩ
    • Noise Filtering With Programmable Bandwidth
    • Receiver Operates at Approximately 1-µA/Hz Sampling Rate (Example, 25 µA at 25 Hz)
    • Hardware Power-Down Mode: Approximately 0-µA Current
  • Flexible Pulse Sequencing and Timing Control
  • Clocking Via External Clock or Internal Oscillator
  • FIFO With 128-Sample Depth:
    • Programmable Partitioning Across Phases
  • Pin-Selectable I2C, SPI Interface
  • Operating Temperature Range: –20°C to +70°C
  • 2.6-mm × 2.1-mm, 0.4-mm Pitch DSBGA Package
  • Supplies:
    • Tx: 3 V to 5.25 V
    • Rx: 1.8 V to 1.9 V (LDO Bypass),
      2.0 V to 3.6 V (LDO Enabled)
    • IO: 1.7 V to Rx_SUP