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MAX97001：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

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).

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

MAX97001: Simplified Block Diagram Applications/Uses Cell Phones Portable Multimedia Players

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Design kits & evaluation modules

• MAX97001EVKIT

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