AFE49I30YZT

Analog Front End (AFE) Overview

The AFE49I30YZT is an ultra-small integrated analog front-end designed for multi-sensor wearable optical biosensing and ECG applications. It supports up to six LEDs and four photodiodes, enabling synchronized PPG and ECG acquisition with a system SNR of 108 dB at 16 μA PD current. The device features a 24-bit resolution, I2C interface, and a 128-sample FIFO buffer. It operates within a supply voltage range of 1.7 V to 5.5 V across separate Rx, Tx, and IO rails, housed in a 2.6-mm × 2.1-mm DSBGA-30 package.

Analog Front End (AFE) Feature Summary

• Supports up to 24 signal phases with flexible allocation of 6 LEDs and 4 PDs per phase
• Synchronized PPG/ECG acquisition supporting up to 1 kHz data rate (PPG/ECG) or 4 kHz (ECG-only)
• Integrated LED driver with 8-bit programmable current control (25 mA to 250 mA) and parallel firing mode
• Low power consumption with typical values of 15 μA for LED and 20 μA for receiver during continuous operation

Analog Front End (AFE) Applications

• ECG monitoring on wearable devices
• Synchronized PPG and ECG for PTT-based blood pressure measurement
• Optical heart-rate monitoring (HRM) and heart-rate variability (HRV)
• Pulse oximetry (SpO2) measurements
• Maximum oxygen consumption (VO2 Max) estimation

Analog Front End (AFE) Procurement Notes

Verify the specific ordering suffix 'YZT' corresponds to the small tape-and-reel carrier containing 250 units. Confirm that the moisture sensitivity level (MSL 1) and peak reflow temperature (260°C) align with your assembly process capabilities. Ensure the DSBGA-30 package dimensions are compatible with your PCB footprint design rules.

Analog Front End (AFE) Selection Notes

Select this component when designing systems requiring simultaneous optical biosensing and electrocardiogram recording. The device is suitable for applications demanding high channel count flexibility with up to 24 configurable phases. Consider the separate supply rails if your system requires distinct voltage levels for the transmitter and receiver sections.

Analog Front End (AFE) Part Context

The AFE49I30 belongs to Texas Instruments' family of integrated analog front-ends for wearable biosensing. It is specifically engineered to address the size and power constraints of modern health monitoring wearables. The YZT suffix indicates the specific packaging configuration used for surface-mount assembly.

Analog Front End (AFE) Replacement Considerations

The datasheet lists the AFE49I30YZR as an alternative package option with identical electrical characteristics but a larger 3000-unit tape-and-reel quantity. No other direct functional substitutes are documented in the provided source material.