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Analog Devices / Maxim Integrated MAX98365 Digital Class D Amplifier Circuit

Analog Devices MAX98365 Digital Class-D Amplifier is an easy-to-use, low-cost digital input amplifier with high-performance efficiency. The MAX98365 Amplifier provides industry-leading Class-AB audio performance with Class-D efficiency. The MAX98365 is compact in size, cost-effective, and has a plug-and-play design. This device eliminates the need for the external MCLK signal, which is used for PCM communication, and reduces EMI and possible board coupling issues. The MAX98365 has a wide supply range of 3V to 14V, with 1ms turn-ON time and 92.7% efficiency. The MAX98365 Amplifier is optimized for use in smart speakers, notebook computers, IoT devices, gaming devices (audio and haptics), smartphones, tablets, and cameras. 

Analog Devices MAX98365 Digital Class-D Amplifier is housed in a compact 12-bump Wafer-Level Package (WLP) ideal for space-constrained applications.

Features

  • Simple plug-and-play design
  • 3V to 14V wide amplifier supply range 
  • 13.8W output power into 8Ω at 14V
  • 17.6W output power into 6Ω at 14V
  • 30mW quiescent power
  • 1ms turn-on time (for MAX98365A and MAX98365B)
  • 92.7% efficiency (7.0W into RL = 8Ω, PVDD = 12V)
  • 22μVRMS output noise
  • 111.5dB dynamic range
  • -85dB THD+N at 1kHz
  • No MCLK required
  • Sample rates of 8kHz to 192kHz
  • Supports left, right, or (left/2 + right/2) output in I2S and left-justified modes
  • Filterless Class-D outputs enabled by sophisticated edge rate control 
  • Low 0.5μA shutdown current
  • Low RF susceptibility rejects TDMA noise from GSM radios
  • Class-D switching frequency trimmed to 6% for better EMI planning
  • Extensive click-and-pop reduction circuitry
  • Robust short-circuit and thermal protection
  • 1.21mm x 1.78mm WLP-12 package; 0.4mm pitch

Applications

  • Smart speakers
  • Notebook computers
  • IoT devices
  • Gaming devices (Audio and Haptics)
  • Smartphones
  • Tablets
  • Cameras

Development Tools

Analog Devices / Maxim Integrated MAX98365 Evaluation System

Completely assembled system that evaluates MAX98365x Class-D audio amplifiers.

Learn Moreabout Analog Devices / Maxim Integrated MAX98365 Evaluation System View Productsrelated to Analog Devices / Maxim Integrated MAX98365 Evaluation System

Block diagram

Block Diagram - Analog Devices / Maxim Integrated MAX98365 Digital Class D Amplifier Circuit

Additional Resources

Deliver Superior Audio Performance with Plug-and-Play Digital Input Class D Amplifiers

Plug-and-play Class D amplifiers simplify system design by eliminating the need for I2C programming, low-jitter sample clocks, logic level shifters, careful board design, or EMI filtering.

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Published: 2022-04-18 | Updated: 2025-02-17