MAX9728A

60mW, DirectDrive, Stereo Headphone Amplifier with Shutdown

60mW DirectDrive Headphone Amplifiers Ideal for TV and Notebook Applications

Data Sheet (Rev. 1)
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Part Details

  • No Bulky DC-Blocking Capacitors Required
  • Low-Power Shutdown Mode, < 0.1µA
  • Adjustable Gain (MAX9728A) or Fixed -1.5V/V Gain (MAX9728B)
  • Low 0.02% THD+N
  • High PSRR (80dB at 1kHz) Eliminates LDO
  • Integrated Click-and-Pop Suppression
  • 4.5V to 5.5V Single-Supply Operation
  • Low Quiescent Current (3.5mA)
  • Available in Space-Saving Packages
    • 12-Pin Thin QFN (3mm x 3mm x 0.8mm)
    • 14-Pin TSSOP (5mm x 4.4mm x 1.1mm)
MAX9728A
60mW, DirectDrive, Stereo Headphone Amplifier with Shutdown
MAX9728A, MAX9728B: Typical Operating Circuit
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Evaluation Kits

MAX9728AEVKIT

Evaluation Kit for the MAX9728A and MAX9728B

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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.

Applications

  • CRT TVs
  • DVD Players
  • LCD/PDP Displays
  • Multimedia Monitors
  • Notebook PCs
MAX9728AEVKIT
Evaluation Kit for the MAX9728A and MAX9728B

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