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