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MAX97003：High-Efficiency, Low-Noise Audio Subsystem

Audio Subsystem with Best-in-Class EMI Reduction and Highly Efficient Class H Stereo Headphone Amplifiers

The MAX97003 audio subsystem combines a mono speaker amplifier with a stereo headphone amplifier. The headphone and speaker amplifiers have independent volume and on/off controls. The four inputs are configurable as two differential or four single-ended inputs. To minimize output noise, both the headphone and speaker outputs utilize a downward expander/noise gate to attenuate noise when no desired input signal is present. The speaker output incorporates an adjustable dynamic range compressor (DRC) and distortion limiter to protect the speaker and maximize loudness. This allows high gain for low-level signals without compromising the quality of large signals. All controls are performed using the two-wire I²C interface. The IC operates in the extended -40°C to +85°C temperature range, and is available in the 2.0mm x 2.4mm, 20-bump WLP package (0.4mm pitch).

Key Features 2.7V to 5.5V Speaker Supply Voltage 1.8V Headphone Supply Voltage 1.0W Speaker Output (VPVDD = 4.2V, ZSPK = 8Ω + 68µH, 1% THD+N) 32mW/Channel Headphone Output (RHP = 32Ω) Active Emissions Limiting for Enhanced EMI Reduction Efficient Class H Headphone Amplifier Ground-Referenced Headphone Outputs Headphone Ground Sense 2 Stereo Single-Ended/Mono Differential Inputs Integrated Expander/Noise Gate for Low Output Noise Integrated DRC (Speaker Outputs) Integrated Distortion Limiter (Speaker Outputs) Extensive Click-and-Pop Reduction Circuitry TDMA Noise Free 2.0mm x 2.4mm, 20-Bump WLP Package (0.4mm Pitch)

MAX97003: Simplified Block Diagram Applications/Uses Cell Phones Portable Media Players

DataSheet

Parametrics

Design kits & evaluation modules

• MAX97003EVKIT

Quality and Environmental Data

• MAX97003.pdf

Ordering Information