# AFE4950 - Ultra-Small Integrated AFE

## Features
️· Supports up to 24 PPG and 1 ECG signal acquisition
️· ECG signal chain: 1-lead, up to 2kHz, RLD output, low noise (0.7 µV-rms), supports up to +/- 0.65 V DC offset, programmable gain (11, 21), 300 Hz anti-aliasing filter, AC/DC lead-off detection.
️· Impedance signal chain: Continuous monitoring between 2 electrodes, 7 MΩ range, 1 kΩ accuracy.
️· PPG Transmitter: 8-bit programmable LED current (25 mA to 250 mA), supports parallel LEDs, Common Anode configuration.
️· PPG Receiver: 2 parallel receivers, supports 4 time-multiplexed photodiodes, ambient offset subtraction, LED offset subtraction, automatic ambient cancellation, noise filtering.
️· High SNR (up to 109dB), Low Current for Wearable devices (15 µA LED, 20 µA Receiver).
️· SPI, I2C interfaces, 2.6mm x 2.5mm DSBGA package.

## Applications
️· Optical Heart-Rate Monitoring (Wearables)
️· ECG signal acquisition
️· PPG & ECG synchronization (BP estimation)
️· Heart-rate variability (HRV)
️· Pulse oximetry (SpO2)

## Description
The AFE4950 is an analog front-end for synchronized PPG and ECG signal acquisition. It supports 2- and 3-electrode configurations and includes a Right Leg Drive (RLD) buffer. It also offers a low-power impedance monitoring capability and a fully-integrated LED driver with 8-bit current control.

## Device Information
️· Part Number: AFE4950
️· Package: DSBGA (36)
️· Body Size: 2.60mm x 2.50mm

## Support & Documentation
️· Documentation updates available via alert registration on the TI website.
️· Support resources (E2E forums) available.
️· Glossary available (SLYZ022).