Ultra-High PSRR Stereo Drivers + Microphone Amp + 100mA Linear Regulator

Ultra-High PSRR Stereo Headphone Driver

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The MAX4298 and MAX4299 are audio system ICs designed for single +5V applications. The MAX4299 features a stereo headphone driver, a microphone amplifier, and a +3.3V linear regulator; the MAX4298 features a stereo headphone driver. The MAX4298/MAX4299 are designed specifically for harsh digital environments where board space is at a premium and the digital power supply is noisy. The design uses innovative design techniques to achieve ultra-high power-supply rejection across the audio signal band while, at the same time, delivering a high-current Rail-to-Rail output drive capability. The chip is designed to drive highly capacitive loads that may be encountered when driving long cables to a remote load such as desktop/notebook headphones or speakers. These devices are fully compliant with PC99 standards.

The amplifiers exhibit 115dB of DC power-supply rejection and 80dB at 100kHz. The output amplifiers are capable of driving a 1.5VRMS signal into a 10-kilohm load with 0.0008% THD+N. They can also drive 32Ω headphones to 1.2VRMS with 0.02% distortion. At +3.3V, the linear regulator can output 100mA of current. The MAX4298 is available in a tiny 10-pin µMAX® while the MAX4299 is available in the space-saving 16-pin TSSOP package.
MAX4298: Typical Operating Circuit MAX4298: Typical Operating Circuit Enlarge+

Key Features

  • Audio System IC (MAX4299)
    • Ultra-High PSRR Stereo Headphone Driver
    • Ultra-High PSRR Microphone Amp
    • 100mA, 3.3V Linear Regulator
  • 93dB typ PSRR at 20kHz Operates Directly from Noisy Digital Supplies
  • Clickless/Popless Power Up, Power Down, Mute and Unmute
  • PC99 Compliant Output Drivers:
    • Better than 1VRMS Output into 16Ω Load and 1.5VRMS and 0.0008% THD+N into 10kΩ Load
  • PC99-Compliant Microphone Amplifier:
    • 0.005% THD+N into 10kΩ Load
  • 22nF Capacitive Load Drive Capability
  • 4.5V to 5.5V Single-Supply Operation
  • Internally Generated Bias Voltage
  • All Gains Externally Adjustable
  • Available in Space-Saving Packages
    • 10-Pin µMAX (MAX4298)
    • 16-Pin TSSOP (MAX4299)


  • Computers: Desktop, Workstation, Server
  • Consumer Audio
  • Cordless Phones
  • Notebook Computers
  • Palmtop Computers
  • Pen Entry Palmtops
Request Reliability Report for: MAX4299 
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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