Single-channel 24-bit AFE in a 15-bump DSBGA
The AFE4404YZPR is a single-channel analog front-end (AFE) from Texas Instruments, delivering 24-bit resolution for precision signal acquisition. It targets applications where one high-resolution measurement channel is sufficient, such as photoplethysmography (PPG) in wearable health monitors or single-lead biopotential sensing.
Supply flexibility and package reality
The 15-bump DSBGA (0.4 mm pitch) demands careful board layout — the exposed bumps under the package require a via-in-pad or micro-via fan-out strategy; a 4-layer PCB with a solid ground plane under the BGA is the safe starting point.
The ROHS3 status covers the full substance restriction list including the four phthalates.
Sourcing and BOM fit
Sourced to order through independent distribution; current pricing and lead time confirmed at RFQ. The 24-bit single-channel architecture makes it a direct fit for BOM positions that previously specified a multi-channel AFE where only one channel was used — no rewiring needed if the pinout is verified against the existing footprint.