AFE4960PYBGT

Analog Front End (AFE) Overview

The AFE4960PYBGT is a Texas Instruments analog front end designed for clinical wearable applications, supporting synchronized acquisition of ECG, PPG, and bio-impedance signals. It features two configurable channels that operate as dual-channel ECG or one ECG plus one respiration impedance channel. The device includes an integrated pace pulse detection circuit, RLD output, and a dedicated PPG signal chain with LED drivers and PD receivers. Data conversion utilizes a single ADC storing results in a 128-sample, 24-bit FIFO. Power supplies require 1.7 V to 1.9 V for Rx and IO domains, and 3.0 V to 5.5 V for the Tx domain.

Analog Front End (AFE) Feature Summary

• Configurable dual-channel architecture supporting 2-channel ECG or 1-channel ECG plus 1-channel respiration impedance measurement
• Integrated PPG signal chain capable of acquiring up to 24 PPG signals with flexible allocation of 4 LEDs and 4 photodiodes per phase
• Supports IEC 60601-2-47:2012/(R)2016 and IEC 60601-2-27:2011(R)2016 compliant systems
• Includes pace pulse detection on one channel and continuous lead on/off detection modes

Analog Front End (AFE) Applications

• Wireless patches for in-patient and out-patient monitoring
• Event monitors for arrhythmia detection
• Hand-held ECG monitors
• Portable multi-lead ECG systems
• Patient vital sign monitoring including Holter, stress, and telemedicine devices

Analog Front End (AFE) Procurement Notes

Verify the specific ordering suffix 'GT' indicates a small tape and reel carrier quantity of 250 units. Confirm RoHS compliance and SNAGCU lead finish status via the manufacturer's orderable addendum. Ensure the selected package variant matches the required moisture sensitivity level and peak reflow temperature specifications for the assembly process.

Analog Front End (AFE) Selection Notes

Select this component when simultaneous ECG, SpO2, and respiration data are required within a compact form factor. The DSBGA (YBG 36) package measures 2.6 mm x 2.6 mm with a 0.4 mm pitch. Designers must account for separate power domains: 1.7 V to 1.9 V for analog/IO and 3.0 V to 5.5 V for the PPG transmitter. Interface selection between SPI and I2C is determined by hardware pin configuration.

Analog Front End (AFE) Part Context

The AFE4960P series integrates ECG, bio-impedance, and PPG functionalities into a single chip. The PYBGT suffix specifically denotes the DSBGA package type with a 250-unit small tape and reel packaging option. This distinguishes it from the YBGR suffix, which corresponds to a 3000-unit large tape and reel configuration. Both variants share identical electrical characteristics and pinouts.

Analog Front End (AFE) Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.