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MAX9700 - 1.2W / Low-EMI / Filterless / Class D Audio Amplifier

General Description

The MAX9700 mono class D audio power amplifier provides class AB amplifier performance with class D efficiency, conserving board space and extending battery life.

Using a class D architecture, the MAX9700 delivers 1.2W into an 8Ω load while offering efficiencies above 90%.

Key Features

  • high 72dB PSRR, a low 0.01% THD+N, and SNR in excess of 90dB. Short-circuit and thermal-overload protection prevent the device from damage during a fault condition. The MAX9700 is available in 10-pin TDFN (3mm ✕ 3mm ✕ 0.8mm), 10-pin µMAX, and 12-bump UCSP™ (1.5mm ✕ 2mm ✕ 0.6mm) packages. The MAX9700 is specified over the extended -40°C to +85°C temperature range. Features.
  • Filterless Amplifier Passes FCC Radiated Emissions Standards with 100mm of Cable.
  • Unique Spread-Spectrum.

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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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19-3030; Rev 1; 6/04 1.2W, Low-EMI, Filterless, Class D Audio Amplifier General Description The MAX9700 mono class D audio power amplifier provides class AB amplifier performance with class D efficiency, conserving board space and extending battery life. Using a class D architecture, the MAX9700 delivers 1.2W into an 8Ω load while offering efficiencies above 90%. A patented, low-EMI modulation scheme renders the traditional class D output filter unnecessary. The MAX9700 offers two modulation schemes: a fixedfrequency (FFM) mode, and a spread-spectrum (SSM) mode that reduces EMI-radiated emissions due to the modulation frequency. Furthermore, the MAX9700 oscillator can be synchronized to an external clock through the SYNC input, allowing the switching frequency to be user defined.