SBASAL9 August   2022 AFE4432

PRODUCTION DATA  

  1. 1Features
  2. 2Applications
  3. 3Description
  4. 4Device and Documentation Support
    1. 4.1 Receiving Notification of Documentation Updates
    2. 4.2 Support Resources
    3. 4.3 Trademarks
    4. 4.4 Electrostatic Discharge Caution
    5. 4.5 Glossary
  5. 5Mechanical, Packaging, and Orderable Information
    1. 5.1 Package Option Addendum
    2. 5.2 Tape and Reel Information
    3. 5.3 Mechanical Data

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • YCH|25
Thermal pad, mechanical data (Package|Pins)

1 Features

  • Supports signal acquisition of up to 12 phase sets
  • Supports up to 4 LEDs, 3 PDs
  • Flexible allocation of LEDs, PDs in each phase
  • Simultaneous signal acquisition from different sensors at different data rates
  • Accurate, continuous PPG monitoring:
    • Low current for continuous heart-rate monitoring on a wearable device with a typical value: 12 μA for the receiver
    • Peak system SNR of 115 dB in 0.5-10 Hz band enables high-accuracy SpO2 measurement
  • Transmitter:
    • 8-Bit Programmable LED current with range adjustable from 25 mA to 250 mA
    • Mode to fire two LEDs in parallel with independent per-phase current control
    • Programmable LED on-time per-phase
    • Simultaneous support of 4 LEDs for SpO2, Multi-Wavelength HRM
  • Receiver:
    • Supports 3 Time-Multiplexed PD Inputs
    • 2 parallel receivers (2 sets of TIA/filter)
    • Individual ambient offset subtraction DAC at each TIA Input with 8-bit per-phase control and range adjustable up to 255-µA
    • Individual LED offset subtraction DAC at each TIA input with 9-bit per-phase control and 64-µA range
    • Digital ambient subtraction at ADC output
    • Noise filtering with programmable bandwidth
    • Transimpedance gain: 3.7 kΩ to 1 MΩ
  • Supports external clock or internal oscillator
  • Option to acquire data synchronized with a system clock
  • Automatic cancellation of DC from Ambient, LED
  • FIFO with 160-sample depth
  • SPI™ interface/ I2C interface
  • 1.9-mm × 1.8-mm DSBGA, 0.35-mm Pitch
  • Supplies: Rx:1.7 - 1.9 V, Tx: 3-5.5 V