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MAX97002,pdf datasheet(Audio Subsystem with Mono Class D speaker amplifier)
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The MAX97002 mono audio subsystem combines a mono speaker amplifier with a stereo headphone amplifier and an analog DPST switch. The headphone and speaker amplifiers have independent volume control and on/off control. The 4 inputs are configurable as 2 differential inputs or 4 single-ended inputs.
The entire subsystem is designed for maximum efficiency. The high-efficiency, 700mW, Class D speaker amplifier operates directly from the battery and consumes no more than 1µA in shutdown mode. The Class H headphone amplifier utilizes a dual-mode charge pump to maximize efficiency while outputting a ground-referenced signal that does not require output coupling capacitors.
The speaker amplifier incorporates a distortion limiter to automatically reduce the volume level when excessive clipping occurs. This allows high gain for low-level signals without compromising the quality of large signals.
All control is performed using the 2-wire I²C interface. The MAX97002 operates over the extended -40°C to +85°C temperature range, and is available in the 2mm x 2.5mm, 20-bump WLP package (0.5mm pitch).
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