AFE4460YBGR

Analog Front End (AFE) Overview

The AFE4460YBGR is an analog front-end for optical bio-sensing applications, supporting up to 32 LEDs and 4 photodiodes. It features a peak system SNR of 115 dB and supports signal acquisition of up to 16 phase sets. The device includes two LED drivers with 8-bit current control (25 mA to 250 mA) and four parallel receiver channels with transimpedance gains from 3.7 kΩ to 1 MΩ. It operates on supplies of 1.7 V to 1.9 V for the receiver (LDO bypass), 1.9 V to 3.6 V (LDO enabled), 3 V to 5.5 V for the transmitter, and 1.7 V to RX_SUP for I/O. The component utilizes a DSBGA-36 package.

Analog Front End (AFE) Feature Summary

• Supports up to 32 LEDs and 4 PDs with flexible allocation across 16 phase sets
• Peak system SNR of 115 dB with low current consumption (typical 15 μA per LED/receiver)
• Integrated FIFO with 256-sample depth for data storage
• Dual interface support via SPI and I2C

Analog Front End (AFE) Applications

• Optical Heart-Rate Monitoring (HRM) for wearables and hearables
• Heart-Rate Variability (HRV) analysis
• Pulse Oximetry (SpO2) measurements
• Optical Spectroscopy

Analog Front End (AFE) Procurement Notes

Verify the specific ordering suffix against the Package Option Addendum to confirm the carrier type. The YBG suffix indicates a DSBGA package. Confirm that the required quantity aligns with the Large Tape & Reel specification of 3000 units per reel for this specific part number variant.

Analog Front End (AFE) Selection Notes

Select this component for designs requiring high dynamic range optical sensing in ultra-small form factors. Ensure the PCB layout accommodates the 2.6-mm × 2.6-mm DSBGA body size with a 0.4-mm pitch. Verify power supply constraints match the separate requirements for Rx, Tx, and IO domains.

Analog Front End (AFE) Part Context

This device belongs to the AFE4460 series of ultra-small integrated analog front-ends designed specifically for optical bio-sensing. It is manufactured by Texas Instruments and is intended for integration into compact wearable health monitoring devices where space and power efficiency are critical design parameters.

Analog Front End (AFE) Replacement Considerations

The AFE4460YBGT is a compatible alternative within the same family, offering identical electrical specifications but packaged in a Small Tape & Reel with a quantity of 250 units.