MAX9722AEUE+

Product Summary

The MAX9722AEUE+ stereo headphone amplifier is designed for portable equipment where board space is at a premium. The MAX9722AEUE+ uses a unique, patented DirectDrive architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, which saves cost, board space, and component height. Additionally, the gain of the amplifier is set internally or adjusted externally. The MAX9722AEUE+ delivers up to 70mW per channel into a 16Ω load or 130mW into a 32Ω load and have low 0.009% THD+N. An 80dB at 217Hz power-supply rejection ratio (PSRR) allows these devices to operate from noisy digital supplies without an additional linear regulator. The MAX9722AEUE+ includes ±8kV ESD protection on the headphone outputs. Comprehensive anticlick-and-pop circuitry suppresses audible clicks and pops on startup and shutdown. A low-power shutdown mode reduces the supply current to 0.1μA.

Parametrics

MAX9722AEUE+ absolute maximum ratings: (1)PGND to SGND: -0.3V to +0.3V; (2)PVDD and SVDD to PGND or SGND: -0.3V to +6V; (3)PVSS and SVSS to PGND:+0.3V to -6V; (4)IN_ to SGND: (SVSS - 0.3V) to (SVDD + 0.3V); (5)OUT_ to PGND: -3.0V to +3.0V; (6)SHDN to SGND: (SGND - 0.3V) to (SVDD + 0.3V); (7)C1P to PGND: -0.3V to (PVDD + 0.3V); (8)C1N to PGND: (SVSS - 0.3V) to +0.3V; (9)PVDD to SVDD: 0V; (10)PVSS to SVSS: 0V; (11)Output Short Circuit to GND: Continuous; (12)Continuous Power Dissipation (TA = +70℃), 16-Pin Thin QFN (derate 14.7mW/℃ above +70℃): 1176mW; (13)16-Pin TSSOP (derate 9.4mW/℃ above +70℃): 755mW; (14)Junction Temperature: +150℃; (15)Operating Temperature Range: -40℃ to +85℃; (16)Storage Temperature Range: -65℃ to +150℃; (17)Lead Temperature (soldering, 10s): +300℃.

Features

MAX9722AEUE+ features: (1)2.4V to 5.5V Single-Supply Operation; (2)High PSRR (80dB at 217Hz) Eliminates LDO; (3)No Bulky DC-Blocking Capacitors Required; (4)Ground-Referenced Outputs Eliminate DC Bias Voltage on Headphone Ground Pin; (5)No Degradation of Low-Frequency Response Due to Output Capacitors; (6)Differential Inputs for Enhanced Noise Cancellation; (7)Adjustable Gain (MAX9722A) or Fixed -2V/V Gain; (8)130mW per Channel into 32Ω; (9)Low 0.009% THD+N; (10)Integrated Click-and-Pop Suppression; (11)Low Quiescent Current (5.5mA); (12)Short-Circuit and Thermal-Overload Protection; (13)±8kV ESD-Protected Amplifier Outputs (Human Body Model); (14)Available in a Space-Saving 16-Pin Thin QFN (3mm* 3mm* 0.8mm) Package.

Diagrams