AFE4900YZR

The Texas Instruments AFE4900YZR is an ultra-low-power integrated Analog Front End (AFE) designed for wearable optical and electrical biosensing applications. This device offers 3 input channels with a resolution of 22 bits, enabling precise signal acquisition.

Key electrical specifications include I2C and SPI interface support, a programmable INA gain ranging from 2.15 to 12.92, and low input noise characteristics. The PPG receiver supports up to 100 dB dynamic range, while the PPG transmitter features four LEDs with up to 200 mA current control. The operating temperature range is -20°C to 70°C.

The AFE4900YZR is housed in a compact 30-DSBGA package, suitable for surface mount applications. It supports synchronized PPG and ECG signal acquisition at data rates up to 1 kHz, with standalone ECG acquisition up to 4 kHz. A 128-sample FIFO buffer is included for ECG and PPG data.

This AFE is ideal for applications such as 1-lead ECG and Optical-HRM, providing a comprehensive solution for biosensing in wearable devices.