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Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifiers

2mm x 2.5mm, 20-Bump WLP Audio Subsystem with Limiter and Industry's Best Class D Speaker and Class H Headphone Amplifiers

Product Details

Key Features

Simplified Block Diagram

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Key Features

  • 2.7V to 5.5V Speaker Supply Voltage
  • 1.6V to 2V Headphone Supply Voltage
  • 700mW Speaker Output (VPVDD = 3.7V, ZSPK = 8Ω + 68µH)
  • 37mW/Channel Headphone Output (RHP = 16Ω)
  • Low-Emission Class D Amplifier
  • Efficient Class H Headphone Amplifier
  • Ground-Referenced Headphone Outputs
  • 2 Stereo Single-Ended/Mono Differential Inputs
  • Integrated Distortion Limiter (Speaker Outputs)
  • Integrated DPST Analog Switch
  • No Clicks and Pops
  • TDMA Noise Free
  • 2mm x 2.5mm, 20-Bump, 0.5mm Pitch WLP Package

Applications/Uses

  • Cell Phones
  • Portable Multimedia Players

Description

The MAX97001 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 MAX97001 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).

Simplified Block Diagram

MAX97001: Simplified Block Diagram MAX97001: Simplified Block Diagram 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 .