MAX9875 Overview
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 bined with active emissions limiting circuitry and spread-spectrum modulation greatly reduces EMI while eliminating the need...
MAX9875 Key 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)