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马克MAXIMMAX97003高效低噪音频参

2020-07-27 14:16:53来源:励志吧0次阅读

MAXIM MAX97003高效低噪音频参考设计方案 - 音频/视频/显示 - 电子工程

MAXIM公司的MAX97003是一款立体声单声道扬声器耳机放大器,扬声器耳机放大器有独立的音量及开关控制单元,四路输入可以配置为两路差分输入或四路单端输入方式。该芯片通过内部集成可调动态范围紧缩及失真限制器使扬声器输出最大音量,在不衰减大信号品质的情况下提高小信号的增益。本文通过介绍MAX97003芯片的特性、运用方向和内部结构图实现对该芯片的理解,并通过MAX97003EVKIT开发参考设计实现快速运用,给出相应开发板设计特性,原理图、PCB制板图及元器件列表。

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 g有来自全国各地从事自动识别业、物流行业、零售行业、制造业(特别是汽车制造业)、食品加工业的上万人(次)观众、听众参加了展览及其同期活动。 亮点一参展企业规模扩大、整体效果良好 随着参展企业的增多ain for low-level signals without compromising the quality of large signals.

All controls are performed using the two-wire I sup2;C interface. The IC operates in the extended -40°C to +85℃ temperature range, and is available in the 2.0mm x 2.4mm, 20-bump WLP package (0.4mm pitch).

MAX97003主要特性:

2.7V to 5.5V Speaker Supply Voltage

1.8V Headphone Supply Voltage

1.0W Speaker Output (VPVDD = 4.2V, ZSPK = 8Ω + 68 micro;H, 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应用:

Cell Phones

Portable Media Players

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