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SGM4917 Datasheet Stereo Headphone Amplifier

Manufacturer: SG Micro

Overview: Preliminary Datasheet SGM4917 125mW, Capless, Stereo Headphone Amplifier with Shutdown.

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General Description

The SGM4917 stereo headphone amplifier is designed for portable equipment where board space is at a premium.

The SGM4917 uses capless Direct-drive architecture to produce a ground-referenced output from a single power supply, eliminating the need for large DC-blocking capacitors for output, and saving cost, board space, and component height.

Additionally, for SGM4917B and SGM4917C, the gain is set internally (-2V/V or -1.5V/V), further reducing component count.

Key Features

  • SGM4917A: External Feedback Gain Network SGM4917B: Fixed -2V/V Gain SGM4917C: Fixed -1.5V/V Gain.
  • No Bulky DC-Blocking Capacitors Required.
  • Ground-Referenced Outputs Eliminate DC-Bias Voltage on Headphone Ground Pin.
  • No Degradation of Low-Frequency Response Due to Output Capacitors.
  • Differential Inputs for Enhanced Noise Cancellation.
  • 125mW per Channel into 32Ω Headset.
  • Low 0.02% THD+N.
  • High PSRR (78dB at 217Hz).
  • I.

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