Class AB stereo headphone driver in a 2 mm × 2 mm footprint
The MAX9723BEBE+ is a stereo headphone amplifier from Analog Devices, built around a Class AB output stage that delivers 60 mW per channel into a 16 Ω load — enough drive for in-ear monitors and portable headphones without the crossover distortion of a Class B design. It operates from a 1.8 V to 3.6 V supply rail, which means it can run directly off a single Li-ion cell or a regulated 1.8 V digital rail without needing a separate audio supply. The -40°C to +85°C temperature range covers industrial and portable equipment that sees outdoor or enclosure heat.
Package and layout constraints for the 16-UCSP
Housed in a 16-ball WFBGA / CSPBGA (UCSP) package measuring 2.02 mm × 2.02 mm, the MAX9723BEBE+ demands a fine-pitch PCB layout with via-in-pad or microvia fan-out under the balls. The 0.50 mm ball pitch is typical for this class of CSP — the board house must support at least 0.25 mm trace/space for breakout between balls. Surface-mount assembly with lead-free reflow is standard; the package is ROHS3 compliant. No exposed thermal pad — the die heat dissipates through the solder balls into the board copper, so a solid ground plane under the package is recommended for thermal management.
Sourcing and lifecycle status
Sourced through authorized and independent distribution channels.