AFE4405 Overview
Description
The AFE4405 is an analog front-end (AFE) for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports three switching light-emitting diodes (LEDs) and up to two photodiodes.
Key Features
- Pulse Frequency: 5 SPS to 1000 SPS
- Flexible Pulse Sequencing and Timing Control
- Flexible Clock Options: – External Clocking: 4-MHz to 60-MHz Input Clock – Internal Clocking: 4-MHz Oscillator
- FIFO with 240 Sample Depth: – Programmable Partitioning Across Phases
- I2C, SPI Interfaces: Selectable by Pin
- Operating Temperature Range: –20°C to +70°C
- 2.6-mm × 2.1-mm DSBGA, 0.4-mm Pitch
- Supplies: Rx: 2 V to 3.6 V, Tx: 3 V to 5.25 V, IO: 1.8 V to 3.6 V
