MAX98314 Mono, 3.2W Class-D Amplifier

　The MAX98314 mono, 3.2D Class D amplifier combines the audio performance of a Class AB amplifier with the efficiency of a Class D amplifier. The device offers five gain options (0dB, 3dB, 6dB, 9dB, and 12dB) via a gain-select input (GAIN).

　　Active Emission Limitation (AEL) with edge rate limiting, overshoot control circuitry and a filterless spread spectrum modulation (SSM) architecture significantly reduce EMI and eliminate the output filter required by traditional Class D amplifiers.

　　The IC's low quiescent current (0.95mA at 3.7V and 1.2mA at 5.0V) helps extend the battery life of portable devices.

　　High linearity, integrated input coupling capacitors (CIN) reduce solution size and provide superior low-frequency sound performance compared to Class-D amplifiers using external input capacitors, providing excellent THD+N, PSRR and CMRR specifications.

　　The IC is available in a small, 9-bump, 0.3mm pitch WLP (1.0mm x 1.0mm x 0.80mm) package and is fully specified over the -40°C to +85°C extended temperature range.

　　Key Features

　　Integrated input coupling capacitors provide excellent linearity

　　fC = 100Hz (6dB)

　　fC = 200Hz (12dB)

　　Ultra-low quiescent current

　　Consumes 0.95mA at 3.7V supply

　　Consumes 1.2mA when powered by 5.0V

　　Capable of providing high power drive with 10% THD+N

　　3.2W into 4Ω load at VPVDD = 5V

　　960mW into 8Ω load at VPVDD = 3.7V

　　Ultra-low noise: 19µV

　　No output filtering required

　　Spread spectrum and active radiation suppression

　　Click and Pop Suppression

　　Overheat and overcurrent protection

　　Low Current Shutdown Mode

　　Small, space-saving package