Class AB amplifier for microphone-level audio paths
The LMV1099TLX/NOPB is a Class AB audio amplifier in a 25-WFBGA package, designed to drive a mono earpiece or small speaker load from a microphone-level input signal. Its 83 mW output into a 32 Ω load is sized for a handset receiver or a headset earpiece — not a room-filling speaker — and the 2.7 V to 5.5 V supply range lets it run from a single Li-ion cell or a regulated 3.3 V / 5 V rail without a separate audio power supply. The -40°C to +85°C operating temperature range qualifies it for outdoor telecom base stations, automotive cabin audio, and industrial control panels where the ambient temperature swings beyond commercial limits.
Integration features that simplify the audio front-end
Differential inputs reject common-mode noise picked up on long microphone traces, while the I²C interface allows a host processor to adjust gain, mute the output, or put the amplifier into shutdown without a dedicated control line. The shutdown feature reduces quiescent current to near-zero when the audio path is idle — useful in battery-powered designs where every microamp matters between talk bursts. The 25-WFBGA package with 0.5 mm ball pitch demands a controlled reflow profile and post-assembly X-ray inspection to verify solder-joint integrity; the 25-uSMD supplier device package is the same footprint.
Active lifecycle and compliance status
The part is ROHS3 compliant, so it meets the latest EU lead-free directive without exemptions — no special handling or documentation is needed for RoHS-regulated markets.