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MAX9721 - 1V / Fixed-Gain / DirectDrive / Stereo Headphone Amplifier

General Description

The MAX9721 fixed-gain, stereo headphone amplifier is ideal for portable equipment where board space is at a premium.

Key Features

  • Single Cell, 0.9V to 1.8V Single-Supply Operation.
  • Fixed Gain Eliminates External Feedback Network MAX9721A: -2V/V MAX9721B: -1.5V/V MAX9721C: -1V/V.
  • Ground-Referenced Outputs Eliminate DC Bias.
  • No Degradation of Low-Frequency Response Due to Output Capacitors.
  • 20mW per Channel into 32Ω Low 0.006% THD+N High PSRR (80dB at 1kHz) Integrated Click-and-Pop Suppression MAX9721.
  • Low Quiescent Current (2.2mA).

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Other Datasheets by Maxim Integrated (now Analog Devices)

Part Number Description
MAX972 Single/Dual-Supply Comparators
MAX9720 50mW / DirectDrive / Stereo Headphone Amplifier
MAX9700 1.2W / Low-EMI / Filterless / Class D Audio Amplifier
MAX9703 15W / Filterless / Spread-Spectrum Mono/Stereo Class D Amplifiers
MAX971 Single/Dual-Supply Comparators

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-3167; Rev 0; 1/04 1V, Fixed-Gain, DirectDrive, Stereo Headphone Amplifier with Shutdown General Description The MAX9721 fixed-gain, stereo headphone amplifier is ideal for portable equipment where board space is at a premium. The MAX9721 uses a unique, patented DirectDrive architecture to produce a ground-referenced output from a single supply, eliminating the need for large DC-blocking capacitors, saving cost, board space, and component height. Fixed gains of -2V/V (MAX9721A), -1.5V/V (MAX9721B), and -1V/V (MAX9721C) further reduce external component count. The MAX9721 delivers up to 20mW per channel into a 32Ω load and achieves 0.006% THD+N.