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Quad Audio Line Driver with 3VRMS Output

Quad Audio Line Driver that Outputs 2VRMS Signals with a Single 5V Supply (1.6VRMS with VDD of 3.3V)

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • 2.7V to 5.5V Single-Supply Operation
  • High 100dB PSRR
  • 109dB Signal-to-Noise Ratio (SNR)
  • Ground-Referenced Outputs
  • No Audible Clicks or Pops at Power-Up/Down
  • Differential Inputs
  • 3VRMS into 1kΩ Load at 5V
  • 2VRMS into 1kΩ Load at 3.3V
  • 3mA Supply Current Per Channel
  • Unity-Gain Stable
  • 100nA Low-Power Shutdown Mode
  • CLOAD Drive > 220pF
  • ±8kV HBM ESD-Protected Outputs

Applications/Uses

  • A/V Receivers
  • CD and DVD Players
  • Consumer and Professional Audio Equipment
  • Portable Audio Devices
  • Set-Top Boxes
  • Soundcards

Description

The MAX9727 quad audio line driver with 3VRMS output is ideal for portable audio devices where board space and cost is at a premium. The device uses Maxim's DirectDrive® architecture that produces a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors and saving cost, board space, and component height. A high 100dB PSRR and low 0.0005% THD+N ensures clean, low-distortion amplification of the audio signal. Each MAX9727 amplifier can provide 3VRMS to a 1kΩ load with less than 0.003% THD+N while operating from a single +5V supply. Each MAX9727 amplifier can provide 2VRMS to a 1kΩ load with less than 0.003% THD+N while operating from a single +3.3V supply.

A shutdown input disables the amplifiers and reduces quiescent current consumption to less than 100nA. The MAX9727 features Maxim's comprehensive click-and-pop suppression circuitry that reduces audible clicks and pops during startup and shutdown.

The MAX9727 operates from a single 2.7V to 5.5V supply, consumes only 3mA of supply current per channel, and is specified over the -40°C to +85°C extended temperature range.

Simplified Block Diagram

MAX9727: Typical Operating Circuit MAX9727: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .