AFE49I30YZR

Analog Front End (AFE) Overview

The AFE49I30YZR is an ultra-small, integrated analog front-end (AFE) designed for multi-sensor wearable optical heart-rate monitoring and bio-sensing applications. It supports signal acquisition of up to 24 phases with flexible allocation of six LEDs and four photodiodes per phase. The device enables synchronized PPG and ECG signal acquisition at data rates up to 1 kHz. Key electrical parameters include a system SNR of up to 108 dB at 16 μA PD current, a transimpedance gain range of 3.7 kΩ to 1 MΩ, and input noise less than 1 μVrms in a 1-150 Hz bandwidth at a 4-kHz sample rate. It operates on supplies ranging from 1.7 V to 5.5 V depending on the specific rail.

Analog Front End (AFE) Feature Summary

• Supports up to 24 configurable signal phases with simultaneous PPG/ECG acquisition capabilities.
• PPG transmitter features 8-bit programmable LED current control adjustable from 25 mA to 250 mA.
• PPG receiver includes individual ambient offset subtraction DACs with up to 255-μA range adjustment.
• Integrated 128-sample depth FIFO and I2C interface for data handling and control.

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

Analog Front End (AFE) Procurement Notes

Verify the package type DSBGA (YZ) with 30 pins and the operating temperature range of -40°C to +85°C against design requirements. Confirm that the standard tape and reel quantity of 3000 units aligns with production volume needs. Ensure proper ESD handling precautions are observed during assembly due to the precision nature of the integrated circuit.

Analog Front End (AFE) Selection Notes

Select this component when designing systems requiring synchronized multi-wavelength optical sensing alongside ECG. The device is suitable for applications needing low power consumption, such as typical values of 15 μA for LEDs and 20 μA for receivers. Consider the 2.6-mm × 2.1-mm footprint if space constraints are critical for wearable form factors.

Analog Front End (AFE) Part Context

The AFE49I30YZR belongs to the AFE49I30 family manufactured by Texas Instruments. It is part of the biosensing AFE product line, specifically categorized under Data Converter ICs. The 'YZR' suffix indicates the DSBGA package variant supplied in a large tape and reel format, distinguishing it from cut-tape options like the YZT.

Analog Front End (AFE) Replacement Considerations

No direct public substitute part numbers are documented in the provided datasheet. Designers should evaluate other members of the AFE49I30 family or similar TI biosensing AFEs based on channel count and package compatibility.