MAX9875中文資料美信數(shù)據(jù)手冊PDF規(guī)格書

General Description

The MAX9875 combines a high-efficiency Class D audio power amplifier with a stereo Class AB capacitor less DirectDrive? headphone amplifier. Maxim’s 3rd generation, filterless Class D amplifier with active emissions limiting technology provides Class AB performance with Class D efficiency.

The MAX9875 delivers up to 725mW from a 3.7V supply into an 8Ω load with 87 efficiency to extend battery life. The filterless modulation scheme combined with active emissions limiting circuitry and spread-spectrum modulation greatly reduces EMI while eliminating the need for output filtering used in traditional Class D devices.

Features

? Low Emissions, Filterless Class D Amplifier

?? Achieves Better than 10dB Margin Under EN55022

?? Class B Limits

? Low RF Susceptibility Design Rejects TDMA

?? Noise from GSM Radios

? Input Mixer with User-Defined Input Mode

? 725mW Speaker Output (RSPK = 8Ω, PVDD = 3.7V)

? 53mW Headphone Output (RHP = 16Ω, VDD = 3.7V)

? Low 0.05 THD+N at 1kHz (Class D Power

?? Amplifier)

? Low 0.016 THD+N at 1kHz (Headphone

?? Amplifier)

? 87 Efficiency (RSPK = 8Ω, POUT = 750mW)

? High Speaker Amplifier PSRR (72dB at 217Hz)

? High Headphone Amplifier PSRR (84dB at 217Hz)

? I2C Control

? Hardware and Software Shutdown Mode

? Click-and-Pop Suppression

? Current-Limit and Thermal Protection

? Available in a Space-Saving, 2.5mm x 2.0mm WLP

?? Package

Applications

?? Cell Phones

?? Portable Multimedia Players