SBAS910A June   2018  – July 2019 AFE4420

PRODUCTION DATA.  

  1. 1Features
  2. 2Applications
  3. 3Description
    1.     Device Images
      1.      Simplified Schematic
  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

Package Options

Mechanical Data (Package|Pins)
  • YZ|30
Thermal pad, mechanical data (Package|Pins)
Orderable Information

3 Description

The AFE4420 is an analog front-end for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports up to four switching light-emitting diodes (LEDs) and up to four photodiodes. Up to 16 signal phases can be defined and the signal can be acquired from each phase in a synchronized manner and stored in a 128-sample First in, First out (FIFO) block. The FIFO can be read out using either an I2C or a SPI interface. The AFE also has a fully integrated LED driver with an 8-bit current control. The device has a high dynamic range transmit-and-receive circuitry that helps with the sensing of very small signal levels.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
AFE4420 DSBGA (30) 2.60 mm × 2.10 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.