MAX98314 Mono 3.2 W Class D Amplifier with Integrated Input Coupling Capacitors


Maxim's industry's-smallest Class D solution integrates input capacitors, saving more than 25% board space

The MAX98314 mono 3.2 W Class D amplifier provides Class AB audio performance with Class D efficiency. This device offers five selectable gain settings (0 dB, 3 dB, 6 dB, 9 dB, and 12 dB) set by a single gain-select input (GAIN).

Active emissions limiting (AEL) edge rate and overshoot control circuitry and a filterless spread-spectrum modulation (SSM) scheme greatly reduce EMI and eliminate the need for output filtering found in traditional Class D devices.

The IC's low 0.95 mA at 3.7 V (1.2 mA at 5.0 V) quiescent current extends battery life in portable applications.

Highly linear, integrated input coupling capacitors (CIN) reduce solution size and provide excellent THD+N, PSRR, and CMRR performance at low frequencies versus standard Class D amplifiers using external input capacitors.

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


Key Features
  • Integrated input coupling capacitors with excellent linearity
    • fC = 100 Hz (6 dB)
    • fC = 200 Hz (12 dB)
  • Low quiescent current
    • 0.95 mA at 3.7 V
    • 1.2 mA at 5.0 V
  • Delivers high output power at 10% THD+N
    • 3.2 W into 4 Ω, VPVDD = 5 V
    • 960 mW into 8 Ω, VPVDD = 3.7 V
  • Ultra-low noise: 19 µV
  • Eliminates output filtering requirement
    • Spread spectrum and active emissions limiting
  • Click-and-pop suppression
  • Thermal and overcurrent protection
  • Low-current shutdown mode
  • Small, space-saving package
Applications/Uses
  • Mobile phones
  • MP3 players
  • Netbook computers
  • Notebook computers
  • Portable audio
  • VoIP phones

MAX98314 Series

Manufacturer Part Number Description Available Quantity Datasheets
MAX98314EWL+T IC AMP AUDIO 3.2W MONO D 9WLP 2377