MAX9725 Datasheet | Maxim Integrated

Description The MAX9725 fixed-gain, stereo headphone amplifier is ideal for portable equipment where board space is at a premium. The MAX9725 uses a unique, patented Direct Drive TM architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and ponent height. Fixed gains of -2V/V (MAX9725A), 1.5V/V (MAX9725B), -1V/V (MAX9725C), and -4V/V (MAX9725D) further reduce external ponent count. The MAX9725 delivers up to 20m W per channel into a 32Ω load and achieves 0.006% THD+N. An 80d B at 1k Hz power-supply rejection ratio (PSRR) allows the MAX9725 to operate from noisy digital supplies without an additional linear regulator. The MAX9725 includes ±8k V ESD protection on the headphone output. prehensive click-andpop circuitry suppresses audible clicks and pops at startup and shutdown. A low-power shutdown mode reduces supply current to 0.6µA (typ). The MAX9725 operates from a single 0.9V to 1.8V supply, allowing the device to be powered directly from a single AA or AAA battery. The MAX9725 consumes only 2.1m A of supply current, provides short-circuit protection, and is specified over the extended -40°C to +85°C temperature range. The MAX9725 is available in a tiny (1.54mm x 2.02mm x 0.6mm) 12-bump chip-scale package (UCSP™) and a 12-pin thin QFN package (4mm x 4mm x 0.8mm). Features - Low Quiescent Current (2.1m A) - Single-Cell, 0.9V to 1.8V Single-Supply Operation - Fixed Gain Eliminates External Feedback Network MAX9725A: -2V/V MAX9725B: -1.5V/V MAX9725C: -1V/V MAX9725D: -4V/V - Ground-Referenced Outputs Eliminate DC Bias - No Degradation of Low-Frequency Response Due to Output Capacitors - 20m W per Channel into 32Ω - Low 0.006% THD+N - High PSRR (80d B at 1k Hz) - Integrated Click-and-Pop Suppression - Low-Power Shutdown Control - Short-Circuit Protection - ±8k V ESD-Protected Amplifier Outputs - Available in Space-Saving Packages 12-Bump UCSP (1.54mm x 2.02mm x 0.6mm) 12-Pin Thin...