Features and Benefits

  • No Bulky DC-Blocking Capacitors Required
  • 2.7V to 5.5V DC Single-Supply Operation
  • 63mW Per Channel into 32Ω (VDD = 5V)
  • Low 0.02% THD+N at 1kHz
  • High 86dB PSRR Eliminates LDO
  • 2VRMS Audio Line Driver from a Single 3.3V Supply
  • Fully Assembled and Tested Surface-Mount Board

Product Details

The MAX9728A evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that evaluates the MAX9728A DirectDrive® stereo headphone amplifier. Maxim's DirectDrive technology eliminates the need for DC-blocking capacitors on the stereo outputs of the amplifier. Designed to operate from a 2.7V to 5.5V DC power supply, the EV kit is capable of delivering up to 42mW per channel into a 16Ω load or 63mW per channel into a 32Ω load at 1% THD+N (VDD = 5V).

The EV kit can be configured as a line driver to deliver 2VRMS into a 10kΩ load from a single 3.3V DC supply. The MAX9728A EV kit also evaluates the MAX9728B IC.


  • CRT TVs
  • DVD Players
  • LCD/PDP Displays
  • Multimedia Monitors
  • Notebook PCs


Pricing displayed is based on 1-piece.

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.