AFE4403

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community AFE4403 SBAS650B – MAY 2014 – REVISED JULY 2014 AFE4403 Ultra-Small, Integrated Analog Front-End for Heart Rate Monitors and Low-Cost Pulse Oximeters 1 Features 1 Fully-Integrated AFE for Pulse Oximeter and Heart Rate Monitoring Applications: Transmit: – Integrated Dual LED Driver (H-Bridge or Common Anode) – Option for a Third LED Support for Optimized SPO2, HRM, or Multi-Wavelength HRM – Up to 110-dB Dynamic Range – LED Current: – Programmable to 100 mA with 8-Bit Current Resolution – 30 µA + Average LED Current – Programmable LED On-Time – Independent LED2 and LED1 Current Reference Receive Channel with High Dynamic Range: – 22-Bit Output in Twos Complement Format – Up to 105-dB Dynamic Range – Low Power: < 650 µA – Dynamic Power-Down Mode to Reduce Current to 300 µA – Adaptable to a Very Wide Range of Signal Amplitudes: – Total Programmable Gain: 10 kΩ to 4 MΩ – Integrated Digital Ambient Estimation and Subtraction Flexible Clocking by External Clock or Crystal: – Pulse Frequency: 62.5 SPS to 2000 SPS – Flexible Pulse sequencing and Timing Control – Input Clock Range: 4 MHz (Min) to 60 MHz (Max) Integrated Fault Diagnostics: – Photodiode and LED Open and Short Detection Supplies: – Rx = 2.0 V to 3.6 V – Tx = 3.0 V to 5.25 V Package: Compact DSBGA-36 (3.07 mm × 3.07 mm × 0.5 mm) Specified Temperature Range: –20°C to 70°C 2 Applications Medical Pulse Oximeter Applica...