80mW, Fixed-Gain, DirectDrive, Stereo Headphone Amplifier with Shutdown

Unique Low-Cost Headphone Amplifier Eliminates DC-Blocking Capacitors and Gain-Setting Resistors

Please check latest availability status for a specific part variant.


The MAX4411 fixed-gain, stereo headphone amplifier is designed for portable equipment where board space is at a premium. The MAX4411 uses a unique DirectDrive® architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height. Additionally, the gain of the amplifier is set internally (-1.5V/V, MAX4411 and -2V/V, MAX4411B), further reducing component count.

The MAX4411 delivers up to 80mW per channel into a 16Ω load and has low 0.003% THD+N. An 86dB at 217Hz power-supply rejection ratio (PSRR) allows this device to operate from noisy digital supplies without an additional linear regulator. The MAX4411 includes ±8kV ESD protection on the headphone outputs. Comprehensive click-and-pop circuitry suppresses audible clicks and pops on startup and shutdown. Independent left/right, low-power shutdown controls make it possible to optimize power savings in mixed-mode, mono/stereo applications.

The MAX4411 operates from a single 1.8V to 3.6V supply, consumes only 5mA of supply current, has short-circuit and thermal-overload protection, and is specified over the extended -40°C to +85°C temperature range. The MAX4411 is available in a tiny (2mm x 2mm x 0.6mm), 16-bump chip-scale package (UCSP™) and a 20-pin thin QFN package (4mm x 4mm x 0.8mm).
MAX4411, MAX4411B: Typical Application Circuit MAX4411, MAX4411B: Typical Application Circuit Enlarge+

Key Features

  • No Bulky DC-Blocking Capacitors Required
  • Fixed -1.5V/V Gain Eliminates External Feedback Network
    • MAX4411: -1.5V/V
    • MAX4411B: -2V/V
  • Ground-Referenced Outputs Eliminate DC-Bias Voltages on Headphone Ground Pin
  • No Degradation of Low-Frequency Response Due to Output Capacitors
  • 80mW per Channel into 16Ω
  • Low 0.003% THD+N
  • High PSRR (86dB at 217Hz)
  • Integrated Click-and-Pop Suppression
  • 1.8V to 3.6V Single-Supply Operation
  • Low Quiescent Current (5mA)
  • Independent Left/Right, Low-Power Shutdown Controls
  • Short-Circuit and Thermal-Overload Protection
  • ±8kV ESD-Protected Amplifier Outputs
  • Available in Space-Saving Packages
    • 16-Bump UCSP (2mm x 2mm x 0.6mm)
    • 20-Pin Thin QFN (4mm x 4mm x 0.8mm)


  • Cell Phones
  • MP3 Players
  • Notebook Computers
  • PDAs
  • Portable Audio Equipment
  • Smartphones

MAX4411EVKIT: Evaluation Kit for the MAX4411

Technical Documents

App Note 4411 Headphone Attenuator Includes Microphone Monitor

Additional Resources

MAX4410: Product of the Year Award

Product Reliability Reports: MAX4411.pdf 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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